Factors determining delay in relaparotomy for anastomotic leakage after colorectal resection

Table 4 Risk factors for prolonged delay of relaparotomy because of anastomotic leakage

Variable		n	Mean delay (d)	P
Age (yr)	< 70	19	4.5	0.71
	≥ 70	17	4.9
Sex	Male	21	4.5	0.95
	Female	15	4.9
Body mass index (kg/m2)	< 25	181	4.6	0.29
	≥ 25	14	5.3
Site of anastomosis	Left	25	4.8	0.29
	Right	11	4.3
Radiological examination performed	Yes	21	6.0	0.051
	No	15	2.7
Outcome of radiological examination	FN	9	8.1	0.007
	TP/NP	27	3.5
Weekend included in periodbetween first clinical parameter and relaparotomy	Yes	142	4.2	0.021
	No	18	2.4

FN: false-negative; TP: true-positive; NP: not performed.

¹Four missing values,

²Four patients excluded with delay of more than seven days. Significance of differences in delay between subgroups is determined using the Mann-Whitney test.