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A study published online in The American Journal of Sports Medicine suggests that lower preoperative Knee injury and Osteoarthritis Outcome Score (KOOS) and SF-36 scores may be linked to increased risk of symptomatic knee osteoarthritis (OA) after anterior cruciate ligament (ACL) reconstruction. 

The researchers conducted a prospective, case-control study of 72 patients who underwent ACL reconstruction. At 7-year follow-up, they determined that seven patients were symptomatic based on KOOS pain ≤72. In multivariate analysis, they found that lower preoperative scores for KOOS sports/recreation and SF-36 mental health were associated with a painful knee, with increased likelihood of 82 percent and 68 percent per 10-unit decrease, respectively. The researchers noted no significant difference in Osteoarthritis Research Society International radiographic score or joint space width between symptomatic and asymptomatic patients. Learn more...