The Sphericity Deviation Score: Is It a Useful and Reproducible Parameter to Assess the Femoral Head Sphericity in Perthes Disease?

J Pediatr Soc North Am · 2026 · PMC13267663 · PMID 42306141

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did not reach statistical significanceno p-value reported

For observer 6 (skewed distribution), Kruskal–Wallis test showed a significant difference when the 3 Stulberg groups were analyzed together ( P = .02), but pairwise comparisons did not reach statistical significance ( Fig. 2 ).

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