Does Microscope Assistance in Cold Steel Tonsillectomy Reduce the Risk of Postoperative Hemorrhage? Results of a Prospective Cohort Study

Table 3

PTH rates stratified by postoperative time (0: on the day of surgery, 1: after the day of surgery) and the need for a surgical control (N: no return to theater, R: return to theater). values are calculated by Fisher’s exact test.

					Total		value
No PTH	646	94.2%	174	95.1%	820	94.4%	0.7212
N0	4	0.6%	1	0.6%	5	0.6%	1.0000
N1	23	3.4%	6	3.3%	29	3.3%	1.0000
R0	2	0.3%	0	0.0%	2	0.2%	1.0000
R1	11	1.6%	2	1.1%	13	1.5%	1.0000
N0 + N1	27	3.9%	7	3.8%	34	3.9%	1.0000
R0 + R1	13	1.9%	2	1.1%	15	1.7%	0.7491

Fisher’s exact test.