Table 3. VAS During 24 Hours After Surgery Between the Two Study Groups^a.

Variables	Time points of Study, h							P Valueb
	Baseline	1	2	4	8	16	24
VAS								< 0.0001
Group N	0.50 (0.12)	2.11 (0.13)	2.65 (0.13)	3.57 (0.16)	3.07 (0.17)	2.00 (0.09)	1.76 (0.10)
Group M	0 (0)c	0.65 (0.12)c	1.23 (0.16)c	1.84 (0.17)c	1.96 (0.26)c	0.76 (0.14)c	0.50 (0.10)c

^aThe values are expressed as mean (SE).

^bThe P-value for Group-Time interaction (Based on the results of GEE analysis)

^cP < 0.05 for statistical difference between the two groups at the same time-points.