The Effect of Local Injections of Bupivacaine Plus Ketamine, Bupivacaine Alone, and Placebo on Reducing Postoperative Anal Fistula Pain: A Randomized Clinical Trial

Table 3

VAS frequency among groups.

VAS test	Group	Mean
VAS at transfer to ward	Group 1	0.13 ± 0.352
	Group 2	0.20 ± 0.414
	Group 3	0 ± 0.000
	Group 4	0.13 ± 0.516
	Total	0.12 ± 0.372
VAS 2 hours later	Group 1	2.0 ± 0.655
	Group 2	1.20 ± 0.414
	Group 3	0.40 ± 0.507
	Group 4	1.60 ± 0.507
	Total	1.30 ± 0.788
VAS 6 hours later	Group 1	4.0 ± 0.926
	Group 2	1.47 ± 0.516
	Group 3	1.2 ± 0.561
	Group 4	3.27 ± 0.458
	Total	2.48 ± 1.347
VAS 12 hours later	Group 1	4.2 ± 0.561
	Group 2	1.93 ± 0.458
	Group 3	1.73 ± 0.594
	Group 4	3.40 ± 0.507
	Total	2.82 ± 1.157
VAS 24 hours later	Group 1	3.4 ± 0.986
	Group 2	2.2 ± 0.561
	Group 3	1.53 ± 0.640
	Group 4	2.87 ± 0.352
	Total	2.5 ± 0.966
ANOVA test