Table 2. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) evaluations of Group I and Group II.

		Group I				Group II
		Mean ± SD	Med (Min–Max)			Mean ± SD	Med (Min–Max)
WOMAC pain
	Pre-injection	15.3 ± 3.0	15	10–20		16.1 ± 2.6	15	12–25
	1 month	7.5 ± 2.1	7*	5–15		6.9 ± 1.9	7*	0–10
	3 months	7.3 ± 0.9	7*	5–9		7.4 ± 2.2	7*	0–13
	6 months	7.0 ± 0.0	7*	7–7		7.0 ± 0.0	7*	7–7
WOMAC stiffness
	Pre-injection	6.0 ± 1.7	6	2–8		6.2 ± 1.2	6	3–10
	1 month	3.2 ± 0.8	3*	2–6		2.9 ± 0.9	3*	0–4
	3 months	3.2 ± 0.4	3*	3–4		3.1 ± 1.1	3*	0–6
	6 months	3.2 ± 0.4	3*	3–4		3.4 ± 0.5	3*	3–4
WOMAC function
	Pre-injection	52.7 ± 12.1	51	34–68		54.0 ± 9.8	51	34–85
	1 month	21.0 ± 6.2	19*	17–44		20.0 ± 7.2	19*	0–34
	3 months	22.5 ± 3.6	21*	19–33		22.7 ± 6.0	19*	16–35
	6 months	19.0 ± 0.0	19*	19–19		19.0 ± 0.0	19*	19–19
WOMAC total
	Pre-injection	74.0 ± 16.2	72	48–96		76.3 ± 13.5	72	49–120
	1 month	31.6 ± 9.0	29*	24–65		29.8 ± 9.7	29*	24–48
	3 months	32.9 ± 4.0	29*	29–45		33.2 ± 8.3	29*	16–54
	6 months	29.2 ± 0.4	29*	29–30		29.4 ± 0.5	29*	29–30

Mann-Whitney U test/Wilcoxon test. *Significant difference (p˂0.05) when compared to the pre-injection evaluation of the same group