Table 1.

Age, sex, BMI, and K-L grade in control and OA subjects

	Control	OA	P Value
Age	62.0 (10.5)	66.6 (8.4)	0.066
BMI	27.4 (5.3)	29.7 (4.8)	0.080
Males/females	12:11	16:21	χ2 = 0.455, P = 0.500
K-L 2	NA	15 (40%)	χ2 = 1.03, P = 0.60
K-L 3	NA	12 (33%)
K-L 4	NA	10 (27%)

Values are means (SD).

BMI, body mass index; K-L, Kellgren and Lawrence grade; OA, osteoarthritis; NA, not applicable.

P values are from independent sample t-tests for age and BMI and from chi-square tests for sex and K-L distribution.