Table 4.

Baseline analysis on WOMAC score of patients with knee osteoarthritis in three groups

Index	Zhuanggu group (n = 136)	Combination group (n = 138)	Celecoxib group (n = 140)	F	P
WOMAC score, mean ± SD	23 ± 8	22 ± 8	23 ± 9	0.79	0.456
Pain score, mean ± SD	6 ± 2	5 ± 2	6 ± 2	0.86	0.424
Stiffness score, mean ± SD	1 ± 1	1 ± 1	1 ± 1	1.42	0.243
Difficulty in daily activities, mean ± SD	17 ± 6	16 ± 6	16 ± 6	0.43	0.653

WOMAC: Western Ontario and McMaster Universities Osteoarthritis; SD: Standard deviation.