Skip to main content
. Author manuscript; available in PMC: 2014 Jun 24.
Published in final edited form as: Osteoarthritis Cartilage. 2009 Sep 1;17(12):1554–1561. doi: 10.1016/j.joca.2009.07.011

Table II.

Characteristics of the study sample (N = 3187), the Johnston County Osteoarthritis Project, 1991–1997

Men Women
Caucasian
(N = 883)		 African-American
(N = 325)		 Caucasian
(N = 1269)		 African-American
(N = 710)
Age Mean (SD) 61.3 (9.9) 60.4 (11.1) 62.0 (10.8) 61.6 (11.0)
BMI* Mean (SD) 27.3 (4.7) 27.5 (5.3) 28.6 (6.0) 31.4 (7.2)
Educational level, <12-years** N (%) 297 (33.8) 174 (66.2) 457 (36.0) 360 (50.8)
Previous Right N (%) 103 (11.9) 25 (8.1) 121 (9.9) 62 (9.0)
Injury Left N (%) 79 (9.1) 28 (9.0) 122 (10.0) 53 (7.7)

P-values between races:

*

P < 0.01 in women;

**

P < 0.001 in men and women.