Heterotopic ossification incidence after hip surgery

How it is measured

Proportion of patients with radiographically detected heterotopic ossification around the hip after hip surgery (arthroplasty or acetabular or hip fracture surgery), at follow-up radiographs, graded by the Brooker classification where stated. The Brooker grade threshold counted as an event (any grade, or grade II-IV, or clinically significant grade III-IV) is recorded with each finding.