TABLE 2.

Weighted prevalence for 4 hip outcomes, all participants and by selected demographic subgroups, Johnston County Osteoarthritis Project, 1991–1997^*.

Demographic subgroup	Hip symptoms		Radiographic Hip OA		Symptomatic Hip OA		Severe Radiographic Hip OA
	%	95% CI	%	95% CI	%	95% CI	%	95% CI
All participants	36.2	34.7,37.8	27.6	26.3,28.9	9.7	8.9,10.6	2.5	2.2, 3.0
Age group
45–54+	30.7	28.5,33.0	21.2	19.0,23.6	5.9	4.7, 7.3	1.4	0.8, 2.4
55–64	35.9	33.6,38.3	23.0	21.1,25.1	8.9	7.5,10.5	1.1	0.8, 1.6
65–74	40.7	38.1,43.4	31.1	28.9,33.4	10.8	9.4,12.5	3.6	2.8, 4.6
75+	42.3	38.3,46.3	42.9	39.2,46.7	17.0	14.6,19.6	5.7	4.3, 7.5
Sex
Men	31.8	29.8,33.8	25.4	23.6,27.3	8.3	7.2, 9.5	2.6	2.0, 3.2
Women	39.5	37.7,41.5	29.5	27.8,31.3	11.1	9.9,12.3	2.5	2.1, 3.1
Race/ethnicity
Caucasians	36.0	34.3,37.8	26.6	25.1,28.1	9.2	8.3,10.2	2.4	2.0, 3.0
African-Americans	37.1	34.9,39.4	32.1	29.9,34.4	12.0	10.3,13.9	3.1	2.5, 4.0

^*Weighted to the 1990 target population.

⁺Radiographic data were available only for age 50 and older in women.