Fig. 3From: Population-based study of the incidence of congenital hip dysplasia in preterm infants from the Survey of Neonates in Pomerania (SNiP)Gestational age and risk of developmental dysplasia of the hip (DDH). Regression analysis of the association between gestational week of birth and risk of DDH (relative risk = 1.17, 95% confidence interval 0.99–1.37, p = 0.065). One week of gestation was associated with a 16% increased risk of hip dysplasia. Dotted line: 95% confidence interval 1.08–1.63Back to article page