Table 1 Participant baseline demographics

Women, n (%)

671 (80%)

Age, mean (SD) years

55.9 (5.2)

BMI, mean (SD) m/kg²

26.3 (4.0)

Race, n (%)

 White

816 (97%)

 Black

8 (1%)

 Asian

12 (1%)

 Other

5 (< 1%)

Comorbidities, n (%)

 None

212 (25%)

 1–2

437 (52%)

 3 + 

177 (21%)

Kellgren & Lawrence Grade (n = 1684 knees)

 0

1010 (60%)

 1

485 (29%)

 2

187 (11%)

 3

2 (< 1%)

 4

0 (0%)

WOMAC, mean (SD) standardized scores/100

 Pain

25.6 (17.3)

 Stiffness

33.7 (21.2)

 Function

23.9 (17.3)

 Duration of pain at enrollment, median (IQR) months (n = 729)

15 (9, 36)