Table 9.

Comparison of data on operations performed, according to groups of patients and the level of statistical significance of differences among groups.

		Mean	SD	Median	Interquartile range		N	p (ANOVA)
Operative time	Group 1	237.69	72.47	220.00	185.00	255.00	13	F(2,39) = 3.314, p = 0.047
	Group 2	235.38	50.93	220.00	202.50	262.50	13
	Group 3	187.86	45.09	165.00	152.50	231.25	14
	Total	219.50	60.381	212.50	175.00	243.75	40
		Group						Total
		Group 1 (1–13)		Group 2 (14–26)		Group 3 (27–40)		n	%
		n	%	n	%	n	%
Intraoperative complications	No	12	30.0%	13	33.5%	12	30.0%	37	93.5%
	Yes	1	3.5%			2	5.0%	3	8.5%
Total		13	33%	13	33%	14	35%	40	100%
Dissecting in the wrong layer	No	10	25.0%	8	20.0%	14	35.0%	32	80.0%
	Yes	3	7.5%	5	12.5%			8	20.0%
Total		13	33%	13	33%	14	35%	40	100%
Conversion	No	10	25.0%	13	32.5%	12	30.0%	35	87.5%
	Yes	3	7.5%			2	5.0%	5	12.5%
Total		13	33%	13	33%	14	35%	40	100%
Oncologic principle violated	No	12	30.0%	12	30.0%	14	35.0%	38	95.0%
	Yes	1	2.5%	1	2.5%			2	5.0%
Total		13	33.5%	13	33.5%	14	35.0%	40	100%