• 1 January 1977
    • journal article
    • research article
    • Vol. 116 (5), 501-504
Abstract
Data from annual surveys and hospital records over 23 yr confirmed the 1950 report of a high prevalence of congenital hip disease [CHD] in the Cree-Ojibwa population of Island Lake, Manitoba [Canada]. Annual rates ranged from 35-600 cases/1000 live births; 5 yr rates for dislocation or subluxation were the highest reported for any population. The minimally declining rates of CHD may reflect ungrading in criteria for hip abnormality, and decreasing isolation and increasing outbreeding of the population. The preponderance of females (female:male ratio, 1.90:1) was low compared with that found in other studies. For all diagnoses bilateral hip involvement exceeded unilateral in frequency; laterality differences were not significant when the sexes were studied separately. Function in everyday activities was impaired little.