Table 1 Group Baseline Characteristics

[(means (SD); except where noted)

(n = 125)

(n = 125)

(n = 125)

P*

Females, n(%)

79 (63%)

79 (63%)

79 (63%)

1.00

Age (years)

62.5 (8.5)*

58.4 (8.4)

57.3 (8.2)

< 0.001

Body mass index (kg/m²)

29.7 (4.6)*

28.1 (4.4)

26.9 (4.4)

< 0.001

Index knee KL Grade = 0, n(%)

42 (34%)*

71 (57%)^

92 (74%)

< 0.001

WOMAC pain (0–20; ↑score = ↑pain)

2.6 (3.3)

1.6 (2.1)

1.4 (2.0)

0.08

Overall Global Rating (0–10, ↑score = ↑effect)

1.7 (1.9)*

1.1 (1.5)

0.8 (1.1)

< 0.001

Days with limited activity in prior month

3.2 (7.3)^

1.7 (4.8)

1.4 (4.3)

0.03