Epidemiology of congenital dysplasia or dislocation of the hip (CDH) in newborns, Babol, 1996-97

Objective: Developmental dysplasia or dislocation of the hip (DDH) is a common and serious problem of newborns and infants. In different parts of the world, the incidence of DDH is different according to their geographical area, race, tribe and culture. With regard to epidemiological characteristics and risk factors, by early diagnosis and treatment can reach a pleasing conclusion and make it possible to reduce individual and social problems. Methods: With simple sequential sampling method, 3498 newborns in two governmental and private maternity were examined by Ortolani and Barlow tests for diagnosing DDH. Also, all suspicious and affected cases were evaluated by sonography. Findings: Suspicious and unstable cases and dislocation of the hip were 6.4%, 7%, 5% respectively. Females were affected 3 times more than males newborns who were born by abdominal delivery were affected 4.7 times more than ones who were born by vaginal delivery (P