Clinical studies of patients treated for slipped capital femoral epiphysis have found limited functional impairment and femoral neck deformity causing eventual coxarthrosis. Since patient-focused assessments minimize bias and reflect health-related quality of life status, we coupled their use to a clinical examination to obtain a more patient-centered picture of slipped capital femoral epiphyseal outcomes. The impact of residual deformity on outcomes also was examined. Of 78 patients treated for slipped capital femoral epiphyses between 1972 and 1998, 29 (38 hips) were evaluated at a mean followup of 7.6 years (range, 1.4-26 years). The average patient age was 21.8 years (range, 14.6-39 years), 55% were female, and the average body mass index was 28.7 (range, 16.1-50.2). Most slips were stable (92%, 35 of 38) and mild or moderate in severity (98%, 36 of 37). Followup examinations revealed slight deficits in range of motion, strength, and limb length. Radiographs showed slight improvements in head-shaft angle and reduced but persistent femoral neck deformity. Osteoarthritic changes were absent or negligible in 84% (32 of 38) of the hips. The average Iowa hip score was 90.5 (range, 51-100). Patient outcome scores for the AAOS Hip/Knee Questionnaire fell slightly below 50th percentile norms. Neither slip stability, severity, nor body mass index impacted outcome. Femoral neck deformity correlated with function, pain, and Boyer grade. Overall, patients had minor functional deficits and pain that may have been related to femoral neck deformity, but longer followup is warranted.
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