. 2015 May 29;15(1):99–105. doi: 10.1007/s12663-015-0791-4

Table 4.

Comparison of duration of anesthesia between carbonated bupivacaine with adrenaline and bupivacaine with adrenaline using Mann–Whitney U test

	Group	N	Mean	SD	U value	P value
Duration of anesthesia in hours	Bupivacaine with adrenaline	50	7.973	1.375	1054	0.176^NS
Duration of anesthesia in hours	Carbonated bupivacaine with adrenaline	50	8.413	1.299	1054	0.176^NS

The mean duration of anesthesia for Bupivacaine with adrenaline was 7.97 ± 1.375 and Carbonated Bupivacaine with adrenaline was 8.413 ± 1.299. This was found to be not statistically significant using Mann–Whitney U test. (This means carbonated bupivacaine and normal bupivacaine has almost the same duration of action)

NS Not significant