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Table 2 Linear regression analyses to identify the relationship of abduction at diagnosis and follow-up of the affected and nonaffected hip to age at diagnosis (adjusted for sex and abduction at diagnosis). With increasing age (in years) a decrease of range of abduction was seen (Estimate in degree)

From: Range of abduction in patients with Legg-Calvé-Perthes disease – a nationwide register-based cohort study

Age at diagnosis Est. 2.5% 97.5% p
In relation to range of abduction LCPD hip at diagnosis −3.3 −4.3 − 2.3 < 0.001
In relation to range of abduction nonaffected hip at diagnosis −1.4 −2.3 −0.6 < 0.001
In relation to range of abduction LCPD hip at follow-up −3.1 −4.4 −1.8 < 0.001
In relation to range of Abduction nonaffected hip at follow-up −1.3 −2.5 −0,2 < 0.05