Table 3.

Multivariate logistic regression analysis of risk factors for post-caesarean SSI, throughout Al Ain Hospital, January 2016–December 2017.

Variable	Sub-group	Coefficient	P value	Odd ratio	95% CI Lower–Upper
Age, year		− 0.093	0.338	0.911	0.754–1.102
Age strataa, year
	< 35			1
	≥ 35	0.662	0.346	1.938	0.490–7.665
BMI		− 0.043	0.537	0.958	0.837–1.097
BMI stratab
	< 25			1
	≥ 25	− 0.357	0.781	0.699	0.056–8.683
Anesthesia type
	Spinal			1
	General	1.034	0.158	2.811	0.699–11.810
	Epidural	− 16.561	0.999	0.000	0.000–0.000
	Epidural & general	− 16.150	0.999	0.000	0.000–0.000
Duration of procedure, mints		− 1.714	0.192	0.180	0.014–2.359
Length of stay, days		− 0.003	0.983	0.977	0.726–1.367
Gestational age, Wks		0.409	0.045	1.506	1.400–2.283
Gestational age stratac
	Preterm			1
	Early term	1.076	0.488	2.932	0.141–61.143
	Full term	1.290	0.542	3.634	0.058–228.826
	Late term	1.462	0.623	4.316	0.013–1475.565
		0.008	0.283	1.008	0.944–1.023
Mode of delivery stratad
	Emergency			1
	Elective	− 17.203	0.995	0.000	0.000–0.000
First CS strata
	No			1
	Yes	− 1.009	0.227	0.365	0.071–1.871
Presence of diabetes strata
	No			1
	Yes	− 0.029	0.971	0.970	0.184–5.102

Variables with P values ≤ 0.05 are displayed in bold.

B: Coefficient.

Body mass index (BMI): was calculated by dividing the woman’s weight (in kilograms) by height (in metres square).

^aStratified based on internationally standard categories ⁴⁵.

^bThe classification of the World Health Organisation was employed in grouping BMI values ⁴⁵.

^cGestational age was classified into groups depending on the age of a pregnancy in weeks starting from the last menstrual period of the women as following: Preterm (< 37 weeks); Early term (37–38 weeks); Full term (39–40 weeks); Late term (41–42 weeks).

^dMode of delivery is depending on the urgency, grade 1, 2 and 3 was classified as emergency, grade 4 and others classified as elective.