Abdominal surgical site infections: incidence and risk factors at an Iranian teaching hospital

BMC Surgery

Table 2 SSI Distribution based on the factors involved.

Variable	Classification	SSI (+)		SSI (-)		total		P. Val.
		N	%	N	%	N	%
Age	Age groups under 25	4	3.7	103	96.3	107	100	<0.001
	Age groups 25–65	102	18.1	462	81.9	564	100
	Age groups above 65	33	25.2	98	74.8	131	100
Sex	Female	61	15.1	344	84.9	405	100	<0.093
	male	78	19.6	319	80.4	397	100
Type Of Wounds	Clean wounds	5	4.6	104	95.4	109	100	<0.001
	Clean contaminated wounds	9	4.2	205	95.8	214	100
	Contaminated wounds	115	31.3	252	68.7	367	100
	Dirty – infected wounds	10	8.9	102	91.1	112	100
Type Of Operation	Urgent	29	14.9	166	85.1	195	100	<0.001
	elective	110	18.1	497	81.9	607	100
Operation Duration	Below 1.5 hours	9	5.4	157	94.6	166	100	<0.001
	1.5 – 4 hours	121	19.5	501	80.5	622	100
	Above 4 hours	9	64.3	5	35.7	14	100
preoperative bed stay	Emergency	24	11.7	181	88.3	205	100	<0.018
	1 – 15 days	100	18.6	439	81.4	539	100
	More than 15 days	15	25.9	43	74.1	58	100
Shaving Time	One hour before operation	29	14.5	171	85.5	200	100	<0.001
	12 hours before operation	110	18.3	492	81.7	602	100
showering Before op.	Taken	80	13.9	497	86.1	577	100	1.00
	none	59	26.2	166	76.8	255	100
Body mass index	Under 20	10	17.2	48	82.8	58	100	0.692
	Ranging 20.1 – 25	73	16	383	84	456	100
	Ranging 25.1 – 30	42	19.5	173	80.5	215	100
	Above 30.1	14	19.2	59	80.8	73	100

ISSN: 1471-2482