Retrospective case-control study (97 RCT, 87 OA, 795 fracture controls) testing whether the critical shoulder angle — introduced by Moor et al. in 2013 — is independently associated with rotator cuff tears and glenohumeral osteoarthritis, using 3:1 age- and sex-matched controls and logistic regression.
When evaluating a patient for rotator cuff pathology, a large CSA on AP radiograph should not drive surgical decision-making toward lateral acromioplasty — this study found no association between high CSA and RCT risk, and artificially lowering CSA may instead predispose to glenohumeral arthritis.
Reserve CSA as a risk marker for OA (CSA <30°), not as a modifiable RCT target.
Retrospective case-control study (97 RCT, 87 OA, 795 fracture controls) testing whether the critical shoulder angle — introduced by Moor et al. in 2013 — is independently associated with rotator cuff tears and glenohumeral osteoarthritis, using 3:1 age- and sex-matched controls and logistic regression.
When evaluating a patient for rotator cuff pathology, a large CSA on AP radiograph should not drive surgical decision-making toward lateral acromioplasty — this study found no association between high CSA and RCT risk, and artificially lowering CSA may instead predispose to glenohumeral arthritis.
Reserve CSA as a risk marker for OA (CSA <30°), not as a modifiable RCT target.