Table 1. Comparison of visual analog scale (VAS) pre and post with paired t-test for groups after excluding the drop-outs during the clinical trial.

Groups		N = 241	Mean	Std. deviation	Mean difference	t-value	p-value
Group A	VAS Pre	81	7.28	1.26	5.69	36.075	<0.001
	VAS Post	81	1.59	1.03
Group B	VAS Pre	77	6.88	1.23	5.18	38.120	<0.001
	VAS Post	77	1.69	1.07
Group C	VAS Pre	83	6.88	1.24	3.34	12.331	<0.001
	VAS Post	83	3.54	2.34