Table 4.

Comparison of NRS pain scores of patients before and after treatment (x̅ ± sd)

Group	Before treatment	After treatment	t value	P value
Single treatment group	3.68±1.63	1.76±0.84	6.174	<0.001
Combined treatment group	3.74±1.75	0.98±0.81	8.467	<0.001
t value	0.148	3.954	-
P value	0.882	<0.001	-

Note: t means independent sample t test for between-group comparison. NRS: numeric rating scale.