Compound
urea
A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.
Structure
Loading the model…
- Class
- Organic compound
- Formula
- CH4N2O
- Mass
- 60.056 g/mol
- Charge
- 0
- InChIKey
- XSQUKJJJFZCRTK-UHFFFAOYSA-N
- SMILES
- NC(N)=O
- Look it up
- ChEBIPubChemBy InChIKey
Identity from ChEBI, geometry from PubChem. Not evidence.
What it touches on the way
Mechanistic reach
13 entities
13 entities reached.
0 reported hops13 assembled from the scaffold
- AQP3ProteinUNIPROT:Q92482transported byInferred only76 paths68 endpoints
- CA2ProteinUNIPROT:P00918substrate ofInferred only28 paths28 endpoints
- AQP9ProteinUNIPROT:O43315transported byInferred only24 paths7 endpoints
- PXDNProteinUNIPROT:Q92626substrate ofInferred only20 paths10 endpoints
- PRDX6ProteinUNIPROT:P30041substrate ofInferred only15 paths15 endpoints
- CA1ProteinUNIPROT:P00915substrate ofInferred only14 paths14 endpoints
- MPOProteinUNIPROT:P05164substrate ofInferred only13 paths13 endpoints
- LPOProteinUNIPROT:P22079substrate ofInferred only10 paths5 endpoints
- AQP7ProteinUNIPROT:O14520transported byInferred only8 paths8 endpoints
- EPXProteinUNIPROT:P11678substrate ofInferred only6 paths3 endpoints
- AQP10ProteinUNIPROT:Q96PS8transported byInferred only4 paths4 endpoints
- SLC14A1ProteinUNIPROT:Q13336transported byInferred only3 paths1 endpoint
Show the remaining 1
What the reference databases state
Statements
26 statements
26 statements · 2 reference databases · Subject: urea · Sources: Human-GEM, Rhea
- urea is converted to cyanamideCompoundRhea RHEA:23056Inferred only
- cyanamide is converted to ureaCompoundRhea RHEA:23056Inferred only
- urea is converted to isocyanateCompoundRhea RHEA:25338Inferred only
- isocyanate is converted to ureaCompoundRhea RHEA:25338Inferred only
- urea is a substrate of CA1ProteinRhea RHEA:23056Inferred only
- urea is a substrate of CA2ProteinRhea RHEA:23056Inferred only
- urea is a substrate of EPXProteinHuman-GEM MAR06602Inferred only
- urea is a substrate of EPXProteinHuman-GEM MAR06603Inferred only
- urea is a substrate of LPOProteinHuman-GEM MAR06602Inferred only
- urea is a substrate of LPOProteinHuman-GEM MAR06603Inferred only
- urea is a substrate of MPOProteinHuman-GEM MAR03263Inferred only
- urea is a substrate of PRDX6ProteinHuman-GEM MAR06602Inferred only
Show the remaining 14
- urea is a substrate of PXDNProteinHuman-GEM MAR06603Inferred only
- urea is a substrate of PXDNProteinHuman-GEM MAR06602Inferred only
- urea is transported by AQP10ProteinRhea RHEA:32799Inferred only
- urea is transported by AQP3ProteinRhea RHEA:32799Inferred only
- urea is transported by AQP7ProteinRhea RHEA:32799Inferred only
- urea is transported by AQP9ProteinRhea RHEA:32799Inferred only
- urea is transported by AQP9ProteinHuman-GEM MAR04949Inferred only
- urea is transported by AQP9ProteinHuman-GEM MAR04951Inferred only
- urea is transported by SLC14A1ProteinHuman-GEM MAR08861Inferred only
- urea is transported by SLC14A1ProteinHuman-GEM MAR04949Inferred only
- urea is transported by SLC14A1ProteinRhea RHEA:32799Inferred only
- urea is transported by SLC14A2ProteinHuman-GEM MAR04949Inferred only
- urea is transported by SLC14A2ProteinRhea RHEA:32799Inferred only
- urea is transported by SLC14A2ProteinHuman-GEM MAR08861Inferred only
Reactions
36 reactions
hydrogen peroxide+urateCHEBI:730073+2proton+urea
Catalysed by MPO
Reaction pageReversibleBalancedEC 1.11.1.7nucleus
Human-GEM MAR03263CC BY 4.0Reference data
L-arginine+waterL-ornithine+urea
Catalysed by ARG1
Reaction pageLeft to rightBalancedEC 3.5.3.1cytosol
Human-GEM MAR03816CC BY 4.0Reference data
Catalysed by AGMAT
Reaction pageLeft to rightBalancedEC 3.5.3.11mitochondrial matrix
Human-GEM MAR04424CC BY 4.0Reference data
Transported by AQP9 or SLC14A2 or SLC14A1
Reaction pageReversibleBalancedcytosol, extracellular space
Human-GEM MAR04949CC BY 4.0Reference data
Transported by AQP9
Reaction pageReversibleBalancedcytosol, mitochondrial matrix
Human-GEM MAR04951CC BY 4.0Reference data
allantoic acid+waterurea+(-)-ureidoglycolic acid
Catalysed by ALLC
Reaction pageLeft to rightBalancedEC 3.5.3.4cytosol
Human-GEM MAR06601CC BY 4.0Reference data
hydrogen peroxide+urateCHEBI:730073+2proton+urea
Catalysed by PRDX6 or EPX or PXDN or LPO
Reaction pageReversibleBalancedEC 1.11.1.7cytosol
Human-GEM MAR06602CC BY 4.0Reference data
hydrogen peroxide+urateCHEBI:730073+2proton+urea
Catalysed by EPX or PXDN or LPO
Reaction pageReversibleBalancedEC 1.11.1.7extracellular space
Human-GEM MAR06603CC BY 4.0Reference data
L-arginine+waterL-ornithine+urea
Catalysed by ARG2
Reaction pageLeft to rightBalancedEC 3.5.3.1mitochondrial matrix
Human-GEM MAR08426CC BY 4.0Reference data
Transported by SLC14A2 or SLC14A1
Reaction pageReversibleBalancedcytosol, extracellular space
Human-GEM MAR08861CC BY 4.0Reference data
Reaction pageReversibleBalance undeterminableextracellular space
Human-GEM MAR09438CC BY 4.0Reference data
allantoic acid+water(-)-ureidoglycolic acid+urea
Reaction pageDirection not assertedBalanced
Rhea RHEA:11016CC BY 4.0Reference data
On the label
Labelled products
2 products
Source: NIH DSLD · Ingredient: urea · 2 products · Declared amount per serving: 200–200 mg (2 products)
2 labels state an amount0 do not
- Endo-met LaboratoriesRenamideCarbamide (Alt. Name: Urea powder) Note: USP200 mgper 1 Tablet(s)DSLD:229047
- Endo-met LaboratoriesRenamideCarbamide (Alt. Name: Urea powder) Note: USP200 mgper 1 Tablet(s)DSLD:229048
Label record: NIH Office of Dietary Supplements · CC0
Where it reaches
10 systems, 23 regions, 80 tissues, 86 transporter routes — routes, not measurements: transporters known to carry urea are expressed there, and no source reports it arriving.
Loading the model…
Papers screened
788 papers
- Compound
- urea
- Screened
- 788
- Admitted
- 0
- Discarded
- 235
- Not read
- 553
- Showing
- 200 of 788
Discarded: another reason, stated per paper121 papers
- PMID:21824976no claim extracted — design_has_no_evidence_type2026-10-12
- PMID:36800572no claim extracted — other2026-10-12
- PMID:38805436no claim extracted — other2026-10-12
- PMID:40317012no claim extracted — other2026-10-12
- PMID:40440346no claim extracted — design_has_no_evidence_type2026-10-12
- PMID:41535079no claim extracted — design_has_no_evidence_type2026-10-12
- PMID:10652239no claim extracted — cause not determined — DOSED: lipopolysaccharide injected intraperitoneally in rats, abstract; urea itself is not given or measured2026-10-05
- PMID:20570704no claim extracted — subject_absent — DOSED: Flax and Pumpkin seeds mixture fed in diet to alloxan-diabetic rats; abstract never mentions urea | Flax and Pumpkin seeds mixture, dietary, diabetic rats, abstract2026-10-05
- PMID:25242266no claim extracted — subject_absent — DOSED: riboflavin (1 and 2 mg/kg) with cisplatin (2 mg/kg) under photoillumination in mice; paper is about riboflavin and cisplatin, never mentions urea | riboflavin (2 mg/kg) with cisplatin, mice, abstract; the paper never mentions urea2026-10-05
- PMID:40990656no claim extracted — cause not determined2026-10-05
- PMID:41452958no claim extracted — cause not determined2026-10-05
- PMID:41789750no claim extracted — cause not determined2026-10-05
and 109 more.
Discarded: the wrong intervention101 papers
- PMID:25632206no claim extracted — reagent_not_exposure2026-10-12
- PMID:31348624no claim extracted — reagent_not_exposure2026-10-12
- PMID:38463019no claim extracted — reagent_not_exposure2026-10-12
- PMID:16563947cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:16879248cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:17485246cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:17531120cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:19950211cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:20355053cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:20863784cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:22435020cited by PMID:25538335; not about the subject it would be filed under2026-10-08
- PMID:3710719cited by PMID:25538335; not about the subject it would be filed under2026-10-08
and 89 more.
Discarded: not retrievable8 papers
- PMID:9754322no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-08
- PMID:15337731no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-07
- PMID:4623845no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-07
- PMID:6890632no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-07
- PMID:7098275no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-07
- PMID:751721no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-07
- PMID:7784310no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-07
- PMID:6727660no PMID parsed, abstract under 200 characters, or no record returned by efetch2026-10-01
Discarded: no comparator3 papers
- PMID:39973079no claim extracted — comparator_not_absence — measured: SCORAD, EASI, DLQI, pruritus VAS, transepidermal water loss, skin hydration, skin pH in atopic dermatitis2026-10-12
- PMID:42541394no claim extracted — comparator_not_absence — measured: wart lesion count and size, time to complete resolution2026-10-12
- PMID:41807289no claim extracted — within_arm_only2026-10-05
Discarded: an endpoint this vocabulary does not hold1 paper
- PMID:39962445no claim extracted — no_outcome_node — measured: capecitabine-associated hand-foot syndrome incidence (any grade and grade 3 or higher), CTCAE v5.0, patient- and physician-reported | proportion of patients with any-grade hand-foot syndrome on capecitabine, patient-reported electronic questionnaire graded by CTCAE v5.02026-10-12
Discarded: no extractable result1 paper
and 1 more.
Not read yet553 papers
- PMID:244842802026-10-09
- PMID:104698592026-10-08
- PMID:172411722026-10-07
- PMID:192396342026-10-07
- PMID:26758002026-10-07
- PMID:30754492026-10-07
- PMID:32541272026-10-07
- PMID:38980002026-10-07
- PMID:39386572026-10-07
- PMID:76214912026-10-07
- PMID:94385742026-10-07
- PMID:186806312026-10-07
and 541 more.
Measured, not recorded
- Compound
- urea
- Endpoints measured
- 804 endpoints
- Recorded as a finding
- No
Show what was measured
cationic amino acid transporter-2 and C/EBPbeta mRNA in liver
increases
Cationic amino acid transporter-2 and C/EBPbeta mRNAs were also highly increased
PMID:10652239 · one of two readings recorded this
iNOS mRNA in liver
increases
When rats were injected intraperitoneally with LPS, iNOS mRNA was markedly induced
PMID:10652239 · one of two readings recorded this
mRNAs of urea cycle enzymes except ornithine transcarbamylase
decreases
mRNAs for all the urea cycle enzymes except ornithine transcarbamylase were gradually decreased and reached 16-28% of controls at 12 h
PMID:10652239 · one of two readings recorded this
urea cycle enzyme protein levels
no effect
However, all these enzymes remained unchanged at protein level up to 24 h
PMID:10652239 · one of two readings recorded this
adriamycin- and light-induced lipid and lipoprotein changes
modulates
All changes induced by adriamycin and constant light were reverted toward normality by melatonin administration
PMID:12435086 · one of two readings recorded this
LDL-c increase and HDL-c decrease
modulates
Constant light exposure also prompted an increase in LDL-c levels and a decrease in HDL-c values, and intensified the effects of adriamycin on these two lipoproteins
PMID:12435086 · one of two readings recorded this
melatonin levels in serum and kidney
decreases
Results show a decrease in melatonin levels induced by both adriamycin and constant light
PMID:12435086 · one of two readings recorded this
triglycerides, total cholesterol and LDL cholesterol
increases
adriamycin induced significant increases in triglycerides, total cholesterol and light-density lipoprotein cholesterol, and lowered high-density lipoprotein cholesterol levels
PMID:12435086 · one of two readings recorded this
inulin clearance
no effect
No differences were observed in inulin (0.28+/-0.08 vs 0.25+/-0.08 ml/min/100 g; P=NS) or creatinine clearance rates
PMID:12543878 · one of two readings recorded this
serum creatine and intramuscular total creatine concentrations
increases, p = 0.05
Serum creatine and intramuscular total creatine concentrations were higher in creatine-supplemented groups (P<0.05)
PMID:12543878 · one of two readings recorded this
urea clearance
no effect
Serum cystatin C concentration, urinary protein excretion, and albumin and urea clearance were comparable between creatine-supplemented and control-diet fed animals in both sham-operated and two-thirds nephrectomized animals
PMID:12543878 · one of two readings recorded this
urea production by bovine pulmonary arterial endothelial cells under L-valine, L-arginine
decreases, L-Val decreased urea production, concentration-dependent
Not recorded as a finding: the compound is what was measured, not what was given
Addition of L-Val to the medium led to a concentration-dependent decrease in urea production and a concentration-dependent increase in NO production in both control and L/T-treated bPAEC.
PMID:14977627 · one of two readings recorded this
urea production
increases
Treatment with L-Arg increased both urea and NO production
PMID:14977627 · one of two readings recorded this
urea production
decreases
In both control and L/T bPAEC, treatment with L-Val decreased urea production and increased NO production
PMID:14977627 · one of two readings recorded this
urea production
decreases
The addition of the combination L-Arg and L-Val decreased urea production compared with the addition of L-Arg alone
PMID:14977627 · one of two readings recorded this
urea production
decreases
Addition of L-Val to the medium led to a concentration-dependent decrease in urea production and a concentration-dependent increase in NO production in both control and L/T-treated bPAEC
PMID:14977627 · one of two readings recorded this
average daily weight gain
increases, p = 0.05
enhanced (P < 0.05) average daily weight gain by 28 and 66%, and body weight by 15 and 32%
PMID:14988458 · one of two readings recorded this
average daily weight gain
increases, p = 0.05
enhanced (P < 0.05) average daily weight gain by 28 and 66%, and body weight by 15 and 32%
PMID:14988458 · one of two readings recorded this
body weight
increases, p = 0.05
enhanced (P < 0.05) average daily weight gain by 28 and 66%, and body weight by 15 and 32%
PMID:14988458 · one of two readings recorded this
body weight
increases, p = 0.05
enhanced (P < 0.05) average daily weight gain by 28 and 66%, and body weight by 15 and 32%
PMID:14988458 · one of two readings recorded this
food intake
no effect
Food intake did not differ between control and arginine-supplemented piglets [66.7 vs. 69.5 g dry matter/(kg body wt. d)]
PMID:14988458 · one of two readings recorded this
plasma ammonia concentration
decreases, p = 0.05
decreased (P < 0.05) plasma concentrations of ammonia by 20 and 35%, and those of urea by 19 and 33%
PMID:14988458 · one of two readings recorded this
plasma ammonia concentration
decreases, p = 0.05
decreased (P < 0.05) plasma concentrations of ammonia by 20 and 35%, and those of urea by 19 and 33%
PMID:14988458 · one of two readings recorded this
plasma arginine concentration
increases, p = 0.05
increased (P < 0.05) plasma concentrations of arginine by 30 and 61%
PMID:14988458 · one of two readings recorded this
plasma arginine concentration
increases, p = 0.05
increased (P < 0.05) plasma concentrations of arginine by 30 and 61%
PMID:14988458 · one of two readings recorded this
plasma insulin and growth hormone concentrations
increases, p = 0.05
Dietary supplementation with 0.4% L-arginine also increased (P < 0.05) plasma concentrations of insulin and growth hormone by 24-27% in piglets
PMID:14988458 · one of two readings recorded this
plasma urea concentration
decreases, p = 0.05
decreased (P < 0.05) plasma concentrations of ammonia by 20 and 35%, and those of urea by 19 and 33%
PMID:14988458 · one of two readings recorded this
plasma urea concentration
decreases, p = 0.05
decreased (P < 0.05) plasma concentrations of ammonia by 20 and 35%, and those of urea by 19 and 33%
PMID:14988458 · one of two readings recorded this
ureagenesis
increases
ureagenesis (approximately 130%, EC50 7.0 x 10(-8) M)
PMID:16352677 · one of two readings recorded this
kidney MDA
decreases
Diet supplemented with Flax and Pumpkin seeds mixture ameliorated the antioxidant enzymes activities observed in diabetic rats and significantly decreased MDA levels
PMID:20570704 · one of two readings recorded this
bladder cancer susceptibility, rs10775480/rs10853535 (SLC14A1, 18q12.3)
increases
rs10775480/rs10853535 (r(2)= 1.00; P = 8.9 × 10(-9); allelic odds ratio 1.16 with 95% CI: 1.10-1.22)
PMID:21824976 · one of two readings recorded this
bladder cancer susceptibility, rs7238033 (SLC14A1, 18q12.3)
increases
rs7238033 (P = 8.7 × 10(-9); allelic odds ratio 1.20 with 95% CI: 1.13-1.28)
PMID:21824976 · one of two readings recorded this
serum urea in cisplatin-injected rats, standard diagnostic kit
decreases, urea lower with rosuvastatin than cisplatin alone
Not recorded as a finding: the compound is what was measured, not what was given
The treatment with RST showed highly significant decrease in BUN (P < 0.001), urea (P < 0.001), creatinine (P < 0.01) and significant increase in albumin (P < 0.001) as compared to CIS-treated group.
PMID:24014910 · one of two readings recorded this
serum urea
increases, p = 0.001
significant (P < 0.001) increase in serum urea, BUN, creatinine, uric acid
PMID:24014910 · one of two readings recorded this
serum urea
decreases, p = 0.001
The treatment with RST showed highly significant decrease in BUN (P < 0.001), urea (P < 0.001), creatinine (P < 0.01)
PMID:24014910 · one of two readings recorded this
serum urea
decreases, p = 0.01
The treatment with SIM showed significant decrease in BUN (P < 0.01), urea (P < 0.01), and creatinine (P < 0.05)
PMID:24014910 · one of two readings recorded this
antioxidant enzyme activities, MDA and carbonyl levels after cisplatin plus riboflavin
decreases
Hence, this study reveals that cisplatin is more toxic in male mice and the ameliorative effect of riboflavin against cisplatin toxicity is stronger in female mice
PMID:25242266 · one of two readings recorded this
glycated haemoglobin (HbA1c)
decreases, significant reduction in HbA1c with coenzyme Q10
The diabetic rats treated with coenzyme Q10 showed a significant (P < 0.05) reduction in HbA1C level as compared to diabetic control rats.
PMID:25538335 · one of two readings recorded this
glycated hemoglobin (HbA1c)
decreases, p = 0.05
The diabetic rats treated with coenzyme Q10 showed a significant (P < 0.05) reduction in HbA1C level as compared to diabetic control rats.
PMID:25538335 · one of two readings recorded this
renal TNF-alpha, MPO activity and TGF-beta
decreases
The treatment with coenzyme Q10 in STZ-nicotinamide treated rats showed a significant reduction in TNF-α (P < 0.001) level, MPO activity (P < 0.05) and TGF-β (P < 0.01) in renal tissue when compared to diabetic control rats.
PMID:25538335 · one of two readings recorded this
renal TNF-alpha, myeloperoxidase (MPO) activity, TGF-beta
decreases, significant reduction in TNF-alpha, MPO activity and TGF-beta versus diabetic control
The treatment with coenzyme Q10 in STZ-nicotinamide treated rats showed a significant reduction in TNF-α (P < 0.001) level, MPO activity (P < 0.05) and TGF-β (P < 0.01) in renal tissue when compared to diabetic control rats.
PMID:25538335 · one of two readings recorded this
serum urea concentration by standard diagnostic kit
decreases, significant reduction in urea levels with coenzyme Q10, metformin, or their combination compared to diabetic control rats
Not recorded as a finding: the compound is what was measured, not what was given
The treatment with coenzyme Q10, metformin or coenzyme Q10 + metformin showed a significant (P < 0.01; P < 0.05 and P < 0.001) reduction in urea levels as compared to diabetic control rats.
PMID:25538335 · one of two readings recorded this
serum urea concentration, standard diagnostic kit assay
decreases, significant reduction in serum urea levels with coenzyme Q10, metformin, or the combination versus diabetic control rats
Not recorded as a finding: the compound is what was measured, not what was given
The treatment with coenzyme Q10, metformin or coenzyme Q10 + metformin showed a significant (P < 0.01; P < 0.05 and P < 0.001) reduction in urea levels as compared to diabetic control rats.
PMID:25538335 · one of two readings recorded this
serum urea
decreases
The treatment with coenzyme Q10, metformin or coenzyme Q10 + metformin showed a significant (P < 0.01; P < 0.05 and P < 0.001) reduction in urea levels as compared to diabetic control rats.
PMID:25538335 · both readings recorded this
negative likelihood ratio
Likelihood ratio for a positive test was 12 and for a negative test was 0.05 with an area under thecurve of 0.985
PMID:25632206 · one of two readings recorded this
positive likelihood ratio
Likelihood ratio for a positive test was 12 and for a negative test was 0.05 with an area under thecurve of 0.985
PMID:25632206 · one of two readings recorded this
area under the curve
Likelihood ratio for a positive test was 12 and for a negative test was 0.05 with an area under thecurve of 0.985
PMID:25632206 · one of two readings recorded this
pooled sensitivity of urea breath test for H. pylori
Pooled sensitivity was 0.96 (95%CI: 0.95-0.97)
PMID:25632206 · one of two readings recorded this
pooled specificity of urea breath test for H. pylori
andpooled specificity was 0.93 (95%CI: 0.91-0.94)
PMID:25632206 · one of two readings recorded this
plasma urea
no effect, p = 0.05
creatinine, urea, and creatinine clearance, compared to control group (p> 0.05)
PMID:26016930 · one of two readings recorded this
pooled sensitivity of 13C-UBT for H. pylori
the summary estimate for sensitivity was 97% (95% CI: 96, 98%)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
100 mg | 5 | 0.07 (53.0%) | <0.01 (76.1%) | 0.98 (0.97, 0.99) | 0.94 (0.92, 0.96)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
50 mg | 4 | 0.24# (28.7%) | 0.17# (40.6%) | 1.00 (0.98, 1.00) | 0.99 (0.96, 1.00)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
75 mg | 4 | 0.01 (76.5%) | 0.28# (21.0%) | 0.93 (0.90, 0.96) | 0.96 (0.94, 0.98)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
10 to 15 minutes | 5 | <0.01 (83.0%) | 0.06 (55.4%) | 0.96 (0.94, 0.98) | 0.94 (0.90, 0.96)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
20 minutes | 5 | 0.26# (24.0%) | 0.15# (40.3%) | 0.99 (0.98, 1.00) | 0.99 (0.97, 1.00)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
30 minutes | 5 | 0.07 (54.6%) | 0.10# (48.4%) | 0.96 (0.94, 0.97) | 0.96 (0.94, 0.98)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
<5.0 δ over baseline | 9 | 0.02 (54.4%) | <0.01 (75.9%) | 0.98 (0.97, 0.99) | 0.96 (0.95, 0.97)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
Hong Kong | 6 | <0.01 (75.5%) | 0.36# (8.4%) | 0.96 (0.94, 0.98) | 0.98 (0.96, 0.99)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
Taiwan | 5 | 0.13# (44.0%) | 0.06 (54.8%) | 0.98 (0.96, 0.99) | 0.93 (0.91, 0.96)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
13C-UBT (INER, Taiwan) | 5 | 0.13# (44.0%) | 0.06 (54.8%) | 0.98 (0.96, 0.99) | 0.93 (0.91, 0.96)
PMID:31348624 · one of two readings recorded this
pooled sensitivity
Others | 10 | <0.01 (77.5%) | 0.05 (46.7%) | 0.96 (0.94, 0.97) | 0.98 (0.97, 0.99)
PMID:31348624 · one of two readings recorded this
pooled specificity of 13C-UBT for H. pylori
and specificity was 96% (95% CI: 95, 97%)
PMID:31348624 · one of two readings recorded this
pooled specificity
100 mg | 5 | 0.07 (53.0%) | <0.01 (76.1%) | 0.98 (0.97, 0.99) | 0.94 (0.92, 0.96)
PMID:31348624 · one of two readings recorded this
pooled specificity
50 mg | 4 | 0.24# (28.7%) | 0.17# (40.6%) | 1.00 (0.98, 1.00) | 0.99 (0.96, 1.00)
PMID:31348624 · one of two readings recorded this
pooled specificity
75 mg | 4 | 0.01 (76.5%) | 0.28# (21.0%) | 0.93 (0.90, 0.96) | 0.96 (0.94, 0.98)
PMID:31348624 · one of two readings recorded this
pooled specificity
10 to 15 minutes | 5 | <0.01 (83.0%) | 0.06 (55.4%) | 0.96 (0.94, 0.98) | 0.94 (0.90, 0.96)
PMID:31348624 · one of two readings recorded this
pooled specificity
20 minutes | 5 | 0.26# (24.0%) | 0.15# (40.3%) | 0.99 (0.98, 1.00) | 0.99 (0.97, 1.00)
PMID:31348624 · one of two readings recorded this
pooled specificity
30 minutes | 5 | 0.07 (54.6%) | 0.10# (48.4%) | 0.96 (0.94, 0.97) | 0.96 (0.94, 0.98)
PMID:31348624 · one of two readings recorded this
pooled specificity
<5.0 δ over baseline | 9 | 0.02 (54.4%) | <0.01 (75.9%) | 0.98 (0.97, 0.99) | 0.96 (0.95, 0.97)
PMID:31348624 · one of two readings recorded this
pooled specificity
Hong Kong | 6 | <0.01 (75.5%) | 0.36# (8.4%) | 0.96 (0.94, 0.98) | 0.98 (0.96, 0.99)
PMID:31348624 · one of two readings recorded this
pooled specificity
Taiwan | 5 | 0.13# (44.0%) | 0.06 (54.8%) | 0.98 (0.96, 0.99) | 0.93 (0.91, 0.96)
PMID:31348624 · one of two readings recorded this
pooled specificity
13C-UBT (INER, Taiwan) | 5 | 0.13# (44.0%) | 0.06 (54.8%) | 0.98 (0.96, 0.99) | 0.93 (0.91, 0.96)
PMID:31348624 · one of two readings recorded this
pooled specificity
Others | 10 | <0.01 (77.5%) | 0.05 (46.7%) | 0.96 (0.94, 0.97) | 0.98 (0.97, 0.99)
PMID:31348624 · one of two readings recorded this
sensitivity
n = 100
5. | Chua (2002) | 100 | 65 | 31 | 0 | 4 | 94.2 | 100.0 | 96.0 | 100.0 | 88.6
PMID:31348624 · one of two readings recorded this
sensitivity
n = 220
6. | Kato (2002) | 220 | i87 | i129 | i2 | i2 | 97.8 | 98.5 | 98.2 | 97.8 | 98.5
PMID:31348624 · one of two readings recorded this
sensitivity
n = 136
9. | Peng (2000) | 136 | i76 | i49 | i6 | i5 | 93.8 | 89.1 | 91.9 | 92.7 | 90.7
PMID:31348624 · one of two readings recorded this
sensitivity
n = 50
2. | Peng (2005a) | 50 | 27 | 22 | 0 | 1 | 96.4 | 100.0 | 98.0 | 100.0 | 95.6
PMID:31348624 · one of two readings recorded this
sensitivity
n = 50
Peng (2005b) | 50 | 18 | 32 | 0 | 0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
PMID:31348624 · one of two readings recorded this
sensitivity
n = 127
3. | Urita (2004) | 127 | i42 | i85 | i0 | i0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
PMID:31348624 · one of two readings recorded this
sensitivity
n = 352
11. | Wang (1998a) | 352 | 197 | 143 | 10 | 2 | 99.0 | 93.4 | 96.6 | 95.2 | 98.6
PMID:31348624 · one of two readings recorded this
sensitivity
n = 352
Wang (1998b) | 352 | 196 | 142 | 11 | 3 | 98.5 | 92.8 | 96.0 | 94.7 | 97.9
PMID:31348624 · one of two readings recorded this
sensitivity
n = 76
1. | Wardi (2012) | 76 | i9 | i57 | i5 | i5 | 64.2 | 91.9 | 86.8 | 64.2 | 91.9
PMID:31348624 · one of two readings recorded this
sensitivity
n = 202
10. | Wong (2000a) | 202 | i110 | i86 | i2 | i4 | 96.5 | 97.7 | 97.0 | 98.2 | 95.6
PMID:31348624 · one of two readings recorded this
sensitivity
n = 202
Wong (2000b) | 202 | i108 | i86 | i2 | i6 | 94.7 | 97.7 | 96.0 | 98.2 | 93.5
PMID:31348624 · one of two readings recorded this
sensitivity
n = 200
4. | Wong (2003) | 200 | i99 | i101 | i0 | i0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
PMID:31348624 · one of two readings recorded this
sensitivity
n = 294
8. | Wong BCY (2001) | 294 | i151 | i127 | i4 | i12 | 92.6 | 96.9 | 94.5 | 97.4 | 91.2
PMID:31348624 · one of two readings recorded this
sensitivity
n = 101
7. | Wong WM (2001a) | 101 | i49 | i50 | i2 | i0 | 100.0 | 96.2 | 98.0 | 96.1 | 100.0
PMID:31348624 · one of two readings recorded this
sensitivity
n = 105
Wong WM (2001b) | 105 | i50 | i54 | i1 | i0 | 100.0 | 98.2 | 99.1 | 98.0 | 100.0
PMID:31348624 · one of two readings recorded this
specificity
n = 100
5. | Chua (2002) | 100 | 65 | 31 | 0 | 4 | 94.2 | 100.0 | 96.0 | 100.0 | 88.6
PMID:31348624 · one of two readings recorded this
specificity
n = 220
6. | Kato (2002) | 220 | i87 | i129 | i2 | i2 | 97.8 | 98.5 | 98.2 | 97.8 | 98.5
PMID:31348624 · one of two readings recorded this
specificity
n = 136
9. | Peng (2000) | 136 | i76 | i49 | i6 | i5 | 93.8 | 89.1 | 91.9 | 92.7 | 90.7
PMID:31348624 · one of two readings recorded this
specificity
n = 50
2. | Peng (2005a) | 50 | 27 | 22 | 0 | 1 | 96.4 | 100.0 | 98.0 | 100.0 | 95.6
PMID:31348624 · one of two readings recorded this
specificity
n = 50
Peng (2005b) | 50 | 18 | 32 | 0 | 0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
PMID:31348624 · one of two readings recorded this
specificity
n = 127
3. | Urita (2004) | 127 | i42 | i85 | i0 | i0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
PMID:31348624 · one of two readings recorded this
specificity
n = 352
11. | Wang (1998a) | 352 | 197 | 143 | 10 | 2 | 99.0 | 93.4 | 96.6 | 95.2 | 98.6
PMID:31348624 · one of two readings recorded this
specificity
n = 352
Wang (1998b) | 352 | 196 | 142 | 11 | 3 | 98.5 | 92.8 | 96.0 | 94.7 | 97.9
PMID:31348624 · one of two readings recorded this
specificity
n = 76
1. | Wardi (2012) | 76 | i9 | i57 | i5 | i5 | 64.2 | 91.9 | 86.8 | 64.2 | 91.9
PMID:31348624 · one of two readings recorded this
specificity
n = 202
10. | Wong (2000a) | 202 | i110 | i86 | i2 | i4 | 96.5 | 97.7 | 97.0 | 98.2 | 95.6
PMID:31348624 · one of two readings recorded this
specificity
n = 202
Wong (2000b) | 202 | i108 | i86 | i2 | i6 | 94.7 | 97.7 | 96.0 | 98.2 | 93.5
PMID:31348624 · one of two readings recorded this
specificity
n = 200
4. | Wong (2003) | 200 | i99 | i101 | i0 | i0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
PMID:31348624 · one of two readings recorded this
specificity
n = 294
8. | Wong BCY (2001) | 294 | i151 | i127 | i4 | i12 | 92.6 | 96.9 | 94.5 | 97.4 | 91.2
PMID:31348624 · one of two readings recorded this
specificity
n = 101
7. | Wong WM (2001a) | 101 | i49 | i50 | i2 | i0 | 100.0 | 96.2 | 98.0 | 96.1 | 100.0
PMID:31348624 · one of two readings recorded this
specificity
n = 105
Wong WM (2001b) | 105 | i50 | i54 | i1 | i0 | 100.0 | 98.2 | 99.1 | 98.0 | 100.0
PMID:31348624 · one of two readings recorded this
correlation between rate of blood ammonia increase and total running time
decreases, r = -0.57, p = 0.05, n = 19
The rate of increase of blood ammonia concentration was significantly negatively correlated with total running time, which was measured as an index of exercise endurance capacity (r = −0.57, P < 0.05).
PMID:32269254 · one of two readings recorded this
energy metabolism (respiratory exchange ratio, fat and carbohydrate expenditure) under chronic hyperammonaemia
increases
we did observe significantly increased respiratory exchange ratio, significantly decreased fat expenditure, and significantly increased carbohydrate expenditure during the day.
PMID:32269254 · one of two readings recorded this
exercise time to exhaustion (endurance capacity)
increases, GTC plus training improved endurance versus training alone
Four weeks of continuous oral administration of GTCs and training intervention significantly improved exercise endurance in mice, whereas no improvement was observed in the mice subjected to training alone (control group).
PMID:32269254 · one of two readings recorded this
liver ammonia concentration after GTC intake
decreases, n = 7
Administration of GTCs did not change the amount of ammonia in the gastrocnemius muscle, but it did significantly decrease the amount of ammonia in the liver.
PMID:32269254 · one of two readings recorded this
liver ammonia concentration
decreases, GTCs significantly decreased liver ammonia, no change in muscle ammonia
Administration of GTCs did not change the amount of ammonia in the gastrocnemius muscle, but it did significantly decrease the amount of ammonia in the liver.
PMID:32269254 · one of two readings recorded this
mitochondrial OCR in C2C12 myotubes pre-incubated with GTCs then exposed to ammonium chloride
increases, n = 6
Exposure to 5 mM ammonium chloride significantly decreased OCR in the C2C12 myotubes, and exposure to 0.01%, but not 0.001%, GTCs rescued the ammonium chloride-induced reduction in OCR.
PMID:32269254 · one of two readings recorded this
mitochondrial oxygen consumption rate (OCR) in C2C12 myotubes and soleus under ammonium chloride exposure
decreases
Administration of 5 mM ammonium chloride significantly suppressed OCR compared with control in C2C12 myotubes and soleus, but not in extensor digitorum longus.
PMID:32269254 · one of two readings recorded this
mitochondrial oxygen consumption rate (OCR) in C2C12 myotubes
increases, GTC pre-incubation increased OCR and rescued ammonium-chloride-induced suppression
Pre-incubation of the muscle cells with 0.01% GTCs significantly increased OCR in C2C12 myotubes compared with control.
PMID:32269254 · one of two readings recorded this
running time to exhaustion after GTC intake plus exercise training
increases, n = 7
Four weeks of continuous oral administration of GTCs and training intervention significantly improved exercise endurance in mice, whereas no improvement was observed in the mice subjected to training alone (control group).
PMID:32269254 · one of two readings recorded this
urea-cycle enzyme gene expression (Cps1, Otc, Ass1, Arg1, Nags, Asl) in primary mouse liver cells treated with GTCs
increases, n = 4
GTC treatment significantly increased the expression of Cps1, Otc, Ass1, and Arg1, but significantly decreased the expression of Nags and Asl, compared with control.
PMID:32269254 · one of two readings recorded this
urea-cycle enzyme gene expression (Nags, Cps1, Asl, Arg1) in mouse liver after 8-week GTC intake
increases, n = 8
ingestion of GTCs significantly increased the expression of Nags, Cps1, Asl, and Arg1, compared with control; the expression of Otc tended to increase (P = 0.07) and the expression of Ass1 remained unchanged.
PMID:32269254 · one of two readings recorded this
urea cycle enzyme gene expression (Nags, Cps1, Otc, Ass1, Asl, Arg1) in liver
increases, increased Nags, Cps1, Asl, Arg1; Otc trend; Ass1 unchanged
ingestion of GTCs significantly increased the expression of Nags, Cps1, Asl, and Arg1, compared with control; the expression of Otc tended to increase (P = 0.07) and the expression of Ass1 remained unchanged.
PMID:32269254 · one of two readings recorded this
urea cycle enzyme gene expression (Nags, Cps1, Otc, Ass1, Asl, Arg1) in mouse liver by qRT-PCR
increases, increased expression of Nags, Cps1, Asl and Arg1; Otc trended up (P = 0.07); Ass1 unchanged
Not recorded as a finding: subject_absent
ingestion of GTCs significantly increased the expression of Nags, Cps1, Asl, and Arg1, compared with control; the expression of Otc tended to increase (P = 0.07) and the expression of Ass1 remained unchanged.
PMID:32269254 · one of two readings recorded this
decrease in conformational stability, modified alpha-crystallin
decreases
The decrease in conformational stability is estimated to be 0.22- and 0.92 kcal mol-1 for modified alpha- and gamma-II crystallin, respectively
PMID:3409984 · one of two readings recorded this
decrease in conformational stability, modified gamma-II crystallin
decreases
The decrease in conformational stability is estimated to be 0.22- and 0.92 kcal mol-1 for modified alpha- and gamma-II crystallin, respectively
PMID:3409984 · one of two readings recorded this
proteolytic degradation rate
increases
Proteolytic digestion also shows a faster rate of degradation for the modified crystallins
PMID:3409984 · one of two readings recorded this
urea and Gdn-HCl denaturation curve midpoint
decreases
The denaturation curves of both urea and Gdn-HCl shift to lower denaturant concentration for crystallins of glutathione mixed disulfide
PMID:3409984 · one of two readings recorded this
AUC of BUN/albumin ratio for mortality
n = 433
Alirezaei (2022) | 72 vs 56 | 63 vs 60 | 433 | 0.733 | 75.8/70.8 | 4.94 | Mortality | Iran
PMID:36800572 · one of two readings recorded this
AUC of BUN/albumin ratio for mortality
n = 358
Ata (2021) † | 66 vs 48 | 44 vs 39 | 358 | 0.823 | 74.5/75.6 | 3.4 | Mortality | Turkey
PMID:36800572 · one of two readings recorded this
AUC of BUN/albumin ratio for mortality
n = 602
Kucukceran (2021) | 75 vs 60 | 66 vs 49 | 602 | 0.809 | 87.5/59.9 | 3.9 | Mortality | Turkey
PMID:36800572 · one of two readings recorded this
AUC of BUN/albumin ratio for mortality
n = 131
Singh (2022) | 56 vs 53 | 31 vs 69 | 131 | 0.695 | 79/54 | 6.23 | Mortality | India
PMID:36800572 · one of two readings recorded this
AUC of BUN/albumin ratio for severity
n = 609
Gemcioglu (2021) | 68 vs 46 | 56 vs 57 | 609 | 0.795 | 63.37/84.89 | 4.83 | Severity | Turkey
PMID:36800572 · one of two readings recorded this
AUC of BUN/albumin ratio for severity
n = 1370
Huang (2021) | 67 vs 54 | 62 vs 44 | 1370 | 0.821 | 69/78.6 | 3.79 | Severity | China
PMID:36800572 · one of two readings recorded this
BUN/albumin ratio, poor vs good prognosis
increases, p = 0.001
Mean difference: 2.838, 95% CI: 2.015–3.66, P <.001, I2 = 92.5%, 7 studies
PMID:36800572 · one of two readings recorded this
pooled area under the sROC curve for poor prognosis
an AUC of 0.81 (95% CI = 0.77–0.84)
PMID:36800572 · one of two readings recorded this
pooled sensitivity for poor prognosis
0.76 (95% CI = 0.68–0.82; I2 = 70.59%)
PMID:36800572 · one of two readings recorded this
pooled specificity for poor prognosis
0.72 (95% CI = 0.63–0. 8; I2 = 95.79%)
PMID:36800572 · one of two readings recorded this
risk of poor prognosis, high vs low BUN/albumin ratio
increases, p = 0.001
OR: 3.009, 95% CI: 1.565–5.783, P =.001, I2 = 93.7%
PMID:36800572 · one of two readings recorded this
sensitivity of BUN/albumin ratio at study cut-off
n = 433
Alirezaei (2022) | 72 vs 56 | 63 vs 60 | 433 | 0.733 | 75.8/70.8 | 4.94 | Mortality | Iran
PMID:36800572 · one of two readings recorded this
sensitivity of BUN/albumin ratio at study cut-off
n = 358
Ata (2021) † | 66 vs 48 | 44 vs 39 | 358 | 0.823 | 74.5/75.6 | 3.4 | Mortality | Turkey
PMID:36800572 · one of two readings recorded this
sensitivity of BUN/albumin ratio at study cut-off
n = 609
Gemcioglu (2021) | 68 vs 46 | 56 vs 57 | 609 | 0.795 | 63.37/84.89 | 4.83 | Severity | Turkey
PMID:36800572 · one of two readings recorded this
sensitivity of BUN/albumin ratio at study cut-off
n = 1370
Huang (2021) | 67 vs 54 | 62 vs 44 | 1370 | 0.821 | 69/78.6 | 3.79 | Severity | China
PMID:36800572 · one of two readings recorded this
sensitivity of BUN/albumin ratio at study cut-off
n = 602
Kucukceran (2021) | 75 vs 60 | 66 vs 49 | 602 | 0.809 | 87.5/59.9 | 3.9 | Mortality | Turkey
PMID:36800572 · one of two readings recorded this
sensitivity of BUN/albumin ratio at study cut-off
n = 131
Singh (2022) | 56 vs 53 | 31 vs 69 | 131 | 0.695 | 79/54 | 6.23 | Mortality | India
PMID:36800572 · one of two readings recorded this
specificity of BUN/albumin ratio at study cut-off
n = 433
Alirezaei (2022) | 72 vs 56 | 63 vs 60 | 433 | 0.733 | 75.8/70.8 | 4.94 | Mortality | Iran
PMID:36800572 · one of two readings recorded this
specificity of BUN/albumin ratio at study cut-off
n = 358
Ata (2021) † | 66 vs 48 | 44 vs 39 | 358 | 0.823 | 74.5/75.6 | 3.4 | Mortality | Turkey
PMID:36800572 · one of two readings recorded this
specificity of BUN/albumin ratio at study cut-off
n = 609
Gemcioglu (2021) | 68 vs 46 | 56 vs 57 | 609 | 0.795 | 63.37/84.89 | 4.83 | Severity | Turkey
PMID:36800572 · one of two readings recorded this
specificity of BUN/albumin ratio at study cut-off
n = 1370
Huang (2021) | 67 vs 54 | 62 vs 44 | 1370 | 0.821 | 69/78.6 | 3.79 | Severity | China
PMID:36800572 · one of two readings recorded this
specificity of BUN/albumin ratio at study cut-off
n = 602
Kucukceran (2021) | 75 vs 60 | 66 vs 49 | 602 | 0.809 | 87.5/59.9 | 3.9 | Mortality | Turkey
PMID:36800572 · one of two readings recorded this
specificity of BUN/albumin ratio at study cut-off
n = 131
Singh (2022) | 56 vs 53 | 31 vs 69 | 131 | 0.695 | 79/54 | 6.23 | Mortality | India
PMID:36800572 · one of two readings recorded this
negative likelihood ratio
a negative likelihood ratio (LR-) of 0.05 (95%CI: 0.04-0.06)
PMID:38463019 · one of two readings recorded this
negative likelihood ratio
a negative likelihood ratio (LR-) of 0.06 (95%CI: 0.04-0.08)
PMID:38463019 · one of two readings recorded this
positive likelihood ratio
a positive likelihood ratio (LR+) of 22.00 (95%CI: 15.60-30.10)
PMID:38463019 · one of two readings recorded this
positive likelihood ratio
a positive likelihood ratio (LR+) of 10.10 (95%CI: 5.74-16.90)
PMID:38463019 · one of two readings recorded this
diagnostic odds ratio
the DOR was calculated at 586.47 (95%CI: 340.03-1011.51)
PMID:38463019 · one of two readings recorded this
diagnostic odds ratio
a DOR of 226.50 (95%CI: 102.57-500.15)
PMID:38463019 · one of two readings recorded this
Egger test intercept for publication bias
p = 0.001
The intercept was 2.54 with a P value < 0.001 for 13C-UBT and 3.04 with a P value < 0.001 for 14C-UBT
PMID:38463019 · one of two readings recorded this
Egger test intercept for publication bias
p = 0.001
The intercept was 2.54 with a P value < 0.001 for 13C-UBT and 3.04 with a P value < 0.001 for 14C-UBT
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
In cases where 100 mg of urea was used (in 12 studies), the 13C-UBT demonstrated a sensitivity of 97.31% (95%CI: 95.92-98.70) and a specificity of 96.08% (95%CI: 94.34-97.82)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Two studies employing 125 mg of urea showed a sensitivity of 93.76% (95%CI: 86.13-100.00) and a specificity of 88.66% (95%CI: 81.07-96.25)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
a 25 mg urea dose demonstrated notably high sensitivity (98.85%; 95%CI: 95.68-100.00) and specificity (99.13%; 95%CI: 96.73-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
in a single study using 250 mg of urea, the 13C-UBT exhibited a sensitivity of 97.06% (95%CI: 91.38-100.00) and a specificity of 98.59% (95%CI: 94.72-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Increasing the urea dose to 50 mg across four studies resulted in a sensitivity of 95.28% (95%CI: 88.51-100.00) and a specificity of 94.91% (95%CI: 87.67-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Seventeen studies explored the use of 75 mg of urea in the 13C-UBT, revealing a sensitivity of 96.47% (95%CI: 95.14-97.79) and a specificity of 98.33% (95%CI: 97.59-99.07)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
two studies using 0.75 µCi of urea reported a sensitivity of 88.94% (95%CI: 76.10-100.00) and a specificity of 91.32% (95%CI: 78.18-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
when employing 1 µCi of marked urea (in 14 studies), the 14C-UBT exhibited a sensitivity of 96.78% (95%CI: 95.46-98.09) and a specificity of 87.19% (95%CI: 59.76-95.81)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Elevating the urea dose to 10 µCi, as explored in a single study, resulted in a sensitivity of 96.72% (95%CI: 92.15-100.00) and a specificity of 80.00% (95%CI: 56.76-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
the use of a 5 µCi marked urea dose, as examined in four studies, demonstrated exceptional sensitivity (99.21%; 95%CI: 98.20-100.00) and specificity (93.43%; 95%CI 86.45-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
p = 0.01
sensitivity of 96.60% (95%CI: 95.64-97.56; P value < 0.01; I2 = 65.0%)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
p = 0.01
sensitivity of 96.15% (95%CI: 94.47-97.82; P value < 0.01; I2 = 62.0%)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
yielded a sensitivity of 91.67% (95%CI: 84.67-98.66) and a specificity of 93.02% (95%CI: 85.41-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
ICOS demonstrated a sensitivity of 98.99% (95%CI: 96.20-100.00) and a specificity of 98.55% (95%CI: 94.56-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Infrared spectrometry, assessed in 8 studies, displayed a sensitivity of 94.72% (95%CI: 90.91-98.54) and a specificity of 98.55% (95%CI: 88.17-98.22)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Isotope-ratio mass spectrometry, scrutinized in 17 studies, demonstrated a sensitivity of 97.37% (95%CI: 96.45-98.28) and a specificity of 98.38% (95%CI: 84.67-98.66)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
recorded a sensitivity of 91.65% (95%CI: 88.31-94.78) and a specificity of 91.92% (95%CI: 88.61-98.21)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
exhibited a sensitivity of 97.83% (95%CI: 93.61-100.00) and a specificity of 96.08% (95%CI: 90.75-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
the use of Beta-scintillation counter for the assessment of 14C-UBT resulted in a sensitivity of 98.11% (95%CI: 95.33-100.00) and a specificity of 93.47% (95%CI: 88.11-98.82)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
the Heliprobe Analyser, assessed in 7 studies, displayed a sensitivity of 95.41% (95%CI: 93.32-97.50) and a specificity of 88.10% (95%CI: 74.43-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
liquid scintillation counting yielded a higher sensitivity of 98.79% (95%CI: 97.90-99.69) while maintaining a specificity of 87.24% (95%CI: 77.69-96.79)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Solid Scintillation UBT (scintillation counting) demonstrated higher specificity, reaching 97.46% (95%CI: 94.62-100.00), with a sensitivity of 95.40% (95%CI: 91.00-99.80)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Tests performed 10 min after urea administration (based on one study) yielded a sensitivity of 97.56% (95%CI: 90.88-100.0) and a specificity of 97.56% (95%CI: 90.88-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
tests carried out at 15 min post-urea administration (as reported in five studies), sensitivity averaged at 97.61% (95%CI: 95.68-99.55), with specificity at 95.85% (95%CI: 91.33-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
optimal sensitivity (98.87%; 95%CI: 98.14-99.60) and specificity (98.14%; 95%CI: 96.98-99.30) were achieved when the assessment was conducted 20 min after urea administration
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
tests performed 30 min after urea administration (in 19 studies) had a sensitivity of 95.15% (95%CI: 93.30-96.92) and a specificity of 96.18% (95%CI: 94.48-97.87)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
For tests conducted 5 min post-urea administration (in one study), sensitivity was 97.83% (95%CI: 93.61-100.0), and specificity was 96.08% (95%CI: 90.75-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
A single study conducting tests 60 min post-urea administration reported a sensitivity of 96.03% (95%CI: 92.62-99.44) and a specificity of 97.83% (95%CI: 93.61-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
four studies investigating multiple time points after urea administration, the sensitivity was 96.13% (95%CI: 92.13-100.0), and the specificity was 97.95% (95%CI: 96.08-99.81)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
A single study, conducted at 12.5 minutes post-administration, reported a sensitivity of 96.05% (95%CI: 91.67-100.00) and a specificity of 95.12% (95%CI: 88.53-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
highest sensitivity (98.39%; 95%CI: 96.36-100.00) and specificity (98.71%; 95%CI: 96.58-100.00) when the tests were conducted 15 minutes after urea administration
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
studies conducted at 20 min post-administration (n = 3) showed a sensitivity of 96.52% (95%CI: 93.50-97.55) and a specificity of 97.23% (95%CI: 94.48-99.97)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
A single study conducted at 25 min post-urea administration reported a sensitivity of 82.29% (95%CI: 76.89-87.69) and a specificity of 84.00% (95%CI: 75.70-92.30)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
A study conducted at 30 minutes post-administration yielded a sensitivity of 97.78% (95%CI: 91.69-100.00) and a specificity of 95.12% (95%CI: 88.53-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
the sensitivity was 96.03% (95%CI: 91.79-100.00), and the specificity was 91.02% (95%CI: 76.07-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
Studies conducted between 10- and 15-minutes post-urea administration (n = 3) showed a sensitivity of 94.92% (95%CI: 89.31-100.00) and a specificity of 96.00% (95%CI: 88.32-100.00)
PMID:38463019 · one of two readings recorded this
pooled sensitivity for H. pylori infection
the sensitivity was consistently high at 97.83% (95%CI: 96.34-99.33), while specificity was somewhat lower at 79.90% (95%CI: 66.15-93.65)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
In cases where 100 mg of urea was used (in 12 studies), the 13C-UBT demonstrated a sensitivity of 97.31% (95%CI: 95.92-98.70) and a specificity of 96.08% (95%CI: 94.34-97.82)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
Two studies employing 125 mg of urea showed a sensitivity of 93.76% (95%CI: 86.13-100.00) and a specificity of 88.66% (95%CI: 81.07-96.25)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
a 25 mg urea dose demonstrated notably high sensitivity (98.85%; 95%CI: 95.68-100.00) and specificity (99.13%; 95%CI: 96.73-100.00)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
in a single study using 250 mg of urea, the 13C-UBT exhibited a sensitivity of 97.06% (95%CI: 91.38-100.00) and a specificity of 98.59% (95%CI: 94.72-100.00)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
Increasing the urea dose to 50 mg across four studies resulted in a sensitivity of 95.28% (95%CI: 88.51-100.00) and a specificity of 94.91% (95%CI: 87.67-100.00)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
Seventeen studies explored the use of 75 mg of urea in the 13C-UBT, revealing a sensitivity of 96.47% (95%CI: 95.14-97.79) and a specificity of 98.33% (95%CI: 97.59-99.07)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
two studies using 0.75 µCi of urea reported a sensitivity of 88.94% (95%CI: 76.10-100.00) and a specificity of 91.32% (95%CI: 78.18-100.00)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
when employing 1 µCi of marked urea (in 14 studies), the 14C-UBT exhibited a sensitivity of 96.78% (95%CI: 95.46-98.09) and a specificity of 87.19% (95%CI: 59.76-95.81)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
Elevating the urea dose to 10 µCi, as explored in a single study, resulted in a sensitivity of 96.72% (95%CI: 92.15-100.00) and a specificity of 80.00% (95%CI: 56.76-100.00)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
the use of a 5 µCi marked urea dose, as examined in four studies, demonstrated exceptional sensitivity (99.21%; 95%CI: 98.20-100.00) and specificity (93.43%; 95%CI 86.45-100.00)
PMID:38463019 · one of two readings recorded this
pooled specificity for H. pylori infection
p = 0.01
specificity of 96.93% (95%CI: 96.04-97.82; P value < 0.01; I2 = 58.0%)
PMID:38463019 · one of two readings recorded this
Other names
6 names
Resolves to: urea
- Also called
- 1728carbamidecarbonyldiamideE927bH2NC(O)NH2ur