Thirty-one patients (with forty involved hips) in whom Legg-Perthes
disease developed when they were less than five years old were reviewed.
Previously defined roentgenographic features of prognostic significance
were measured. Long-term follow-up (average, 129 months) allowed
statistical testing of factors previously thought to be of significance in
predicting outcome. Many of these patients were found to have poor results
as measured roentgenographically. In addition, many prognostic indications
were found not to be independent measures and of those demonstrating
independence, none correlated with the functional outcome.