Annals of Pediatric Surgery

Table 3 Statistical analysis of operation time of the groups and subgroups

From: Laparoscopic surgery of urachal remnants in children: 3-center experience and comparison to an open approach

	Group1								Group 2
	Subgroup 1.1		Subgroup 1.2		Subgroup 1.3		Total		Group 2
	s	n	s	n	s	n	s	n	s	n
N of operated patients	27	17	35	27	25	24	87	68	24	19
Mean time	64.1	52.58	53.9	44.5	66.6	67.08	60.72	54.5	42.7	39.7
Standard deviation	38.48	29.6	26.2	16.9	21.29	21.61	29.63	24.07	18.9	16.5
Standard error	7.4	7.18	4.42	3.2	4.25	4.41	3.1	2.9	3.8	3.8
Median	50	40	50	45	65	65	55	50	35	35
Min time	20	20	20	20	35	35	20	20	20	20
Max time	192	125	135	80	120	120	192	125	90	80

Subgroups: s total number of patients (incl. simultaneous operations), n number of patients without (no) simultaneous operations

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