Table 3.

VAS scores at different time period after surgery $\left(\overline{\mathbf{x}}\mathbf{\pm }\mathbf{s}\right)$

Group	Cases	6 h after surgery	12 h after surgery	24 h after surgery	48 h after surgery
Group C	24	2.78 ± 0.85	3.64 ± 0.74	3.79 ± 0.87	3.02 ± 0.71
Group P1	24	2.54 ± 0.81*	2.69 ± 0.78*&	3.03 ± 0.97*&	2.96 ± 0.78
Group P2	25	2.57 ± 0.79*	2.79 ± 0.81*	3.52 ± 0.84*	2.94 ± 0.73
Group P3	25	2.55 ± 0.77*	2.83 ± 0.69*	3.49 ± 0.79*	2.99 ± 0.67

Note: *P < 0.05, compared with Group C. &P <0.05, compared with Group P2 and P3.