Table 3.

The change in mean MMP-13 conc. at different intervals.

	MMP-13			Test valuea	P value	Sig.
	Baseline	1 month	3 months
	Mean ± SD	Mean ± SD	Mean ± SD
Group I	1798.00 ± 1047.49	1616.33 ± 977.76	829.67 ± 438.30	10.619	≤0.001	HS
Group II	1393.00 ± 714.03	1136.00 ± 891.41	316.17 ± 323.09	20.205	≤0.001	HS
Test valueb	-1.750	-1.988	-5.165
P value	0.085	0.052	≤0.001

P value > 0.05: nonsignificant; P value < 0.05: significant; P value < 0.01: highly significant. ^aRepeated measure ANOVA test; ^bindependent t-test.