Table 2 Demographic features, radiological characteristics, and self-reported outcomes in participants with knee osteoarthritis

Age, years (n = 87)

60.4 (10.5)

41-85

Female, n (%) (n = 87)

60 (69 %)

Race: n (%) (n = 87)

Caucasian

50 (57 %)

African American

27 (31 %)

American Indian or Alaskan Native

3 (4 %)

More than one race

4 (4 %)

Other

3 (4 %)

Mean BMI^a (kg/m²) (n = 87)

32 (6.9)

20-49

Duration of Knee Pain in index knee, years (SD) (n = 82)

8.4 (10.1)

<1-65

Mean Comorbidities (n = 87)

Heart Disease

7 (8 %)

Hypertension

42 (48 %)

Diabetes

12 (14 %)

NSAID^b prior to study, n (%) (n = 86)

51 (59 %)

Other type of analgesics prior to study, n (%) (n = 86)

28 (33 %)

Mean WOMAC^c pain at exam [0–500] (SD) (n = 84)

211 (113)

28-490

Mean WOMAC^c function at exam [0–1700] (SD) (n = 84)

709 (394)

47-1661