Table 1 Demographic, SES and WOMAC score characteristics of study participants with rOA and symptomatic ^§ knee rOA

Demographic and clinical characteristics

 Age, mean (SD)

67.4 (10.8)

66.2 (11.0)

 Female,%

63.6

65.8

 African American race,%

36.6

40.2

 BMI^‡, mean (SD)

32.7 (7.58)

33.9 (7.87)

 Hip pain,%

42.6

54.6

 PAS^¥ (0-16), mean (SD)

9.40 (3.58)

9.84 (3.54)

 Co-morbidity count (0-11), mean (SD)

1.58 (1.38)

1.73 (1.44)

SES characteristics

 Less than 12 yrs education,%

35.5

36.9

 Non-managerial occupation,%

39.4

35.9

 Poverty, mean (SD)

19.1 (11.5)

19.4 (11.6)

 Low (<12%),%

27.0

25.9

 Medium (12-25%),%

52.8

52.4

 High (>25%),%

20.2

21.7

WOMAC^¶ Outcomes

WOMAC^¶ Function, mean (SD)

19.2 (16.9)

23.6 (16.3)

WOMAC^¶ Pain, mean (SD)

5.7 (5.1)

7.3 (4.9)

WOMAC^¶ Stiffness, mean (SD)

2.7 (2.2)

3.4 (2.1)

WOMAC^¶ Total, mean (SD)

27.6 (23.2)

34.3 (22.1)