Olerud and Molander (1984) introduce and validate the Olerud-Molander Ankle Score (OMAS), a 9-item, 100-point patient-reported outcome scale for ankle fractures. The score is validated against four criterion measures in 90 operatively treated patients with multicomponent fractures. The paper establishes OMAS as the standard outcome instrument for ankle fracture research.
Every ankle fracture outcome study you read reports an OMAS score — this is the paper that created it. The scale's structure tells you what matters most to patients after ankle fracture: pain (25 points) and return to work/ADLs (20 points) together account for nearly half the score. When counseling patients, those are the two domains to address directly.
The OA grading data gives you a clinically usable threshold: grade I joint space narrowing on follow-up X-ray does not significantly worsen function. Grade II or higher does. And grade II–IV drops the mean score from 78 to 23. Use this to frame radiographic findings honestly with patients.
The comparison to crude categorical grading is the paper's most important methodologic lesson: the same cohort, the same outcomes, but only OMAS detected the benefit of anatomic reduction. When you evaluate surgical results in the literature, the outcome instrument being used is not a footnote. It determines what you can and cannot conclude.
Olerud and Molander (1984) introduce and validate the Olerud-Molander Ankle Score (OMAS), a 9-item, 100-point patient-reported outcome scale for ankle fractures. The score is validated against four criterion measures in 90 operatively treated patients with multicomponent fractures. The paper establishes OMAS as the standard outcome instrument for ankle fracture research.
Every ankle fracture outcome study you read reports an OMAS score — this is the paper that created it. The scale's structure tells you what matters most to patients after ankle fracture: pain (25 points) and return to work/ADLs (20 points) together account for nearly half the score. When counseling patients, those are the two domains to address directly.
The OA grading data gives you a clinically usable threshold: grade I joint space narrowing on follow-up X-ray does not significantly worsen function. Grade II or higher does. And grade II–IV drops the mean score from 78 to 23. Use this to frame radiographic findings honestly with patients.
The comparison to crude categorical grading is the paper's most important methodologic lesson: the same cohort, the same outcomes, but only OMAS detected the benefit of anatomic reduction. When you evaluate surgical results in the literature, the outcome instrument being used is not a footnote. It determines what you can and cannot conclude.