Table 1 Patient demographics

Age, mean (SD)

74.4 (9.4)

64.3 (11.7)

66.6 (11.5)

Female, n (%)

236 (78%)

284 (54%)

866 (58%)

BMI, mean (SD)

24.5 (4.6)

30.2 (7.0)

28.1 (4.8)

Ethnicity

 White/Caucasian, n (%)

0 (0%)

388 (74%)

1348 (91%)

 Hispanic/Latino, n (%)

0 (0%)

33 (6%)

47 (3%)

 Japanese, n (%)

301 (100%)

0 (0%)

0 (0%)

 African American, n (%)

0 (0%)

77 (15%)

0 (0%)

Habitation

 Lives alone, n (%)

52 (17%)

116 (22%)

335 (23%)

 Lives with partner/spouse, n (%)

109 (36%)

354 (67%)

998 (67%)

 Lives with family/friends, n (%)

89 (29%)

38 (7%)

91 (6%)

Employment

 Working full time, n (%)

22 (7%)

200 (38%)

338 (23%)

 Working part time, n (%)

17 (6%)

39 (7%)

78 (5%)

 Homemaker, n (%)

149 (49%)

50 (9%)

182 (12%)

 Retired, n (%)

68 (23%)

214 (41%)

806 (54%)

 Unemployed, n (%)

3 (1%)

20 (4%)

31 (2%)

Severity of OA

 Mild, n (%)

124 (41%)

173 (33%)

321 (22%)

 Moderate, n (%)

152 (50%)

246 (47%)

815 (55%)

 Severe, n (%)

25 (8%)

107 (20%)

341 (23%)