Table 2.

Obstetrics/Operative factors in blood transfused versus non-transfused patients

Variables	Transfused (N = 188)	Not transfused (N = 718)	Crude Odds Ratio (cOR)	95% CI	P value
Previous uterine scar
Yes	42(14.1%)	256(85.9%)	0.52	0.36–0.76	<0.001
No	146(24.0%)	462(76.0%)	1.00	Reference	Reference
Elective c/s
Yes	31(9.9%)	281(90.1%)	0.31	0.20–0.46	<0.001
No	157(26.4%)	437(73.6%)	1.00	Reference	Reference
No. of foetus
Single	172(21.1%)	643(78.9%)	1.25	0.71–2.21	0.43
Multiple	16(17.6%)	75(82.4%)	1.00	reference	Reference
Cadre of surgeons
Registrar	58(13.6%)	368(86.4%)	0.04	0.02–0.09	<0.001
Senior registrar	100(22.6%)	343(77.4%)	0.07	0.03–0.16	<0.001
Consultant	30(81.1%)	7(18.9%)	1.00	Reference	Reference
Time of surgery
Regular hours	87(18.1%)	393(81.9%)	0.07	0.52–0.98	0.04
Call hours	101(23.7%)	87(18.1%)	1.00	Reference	Reference
Preoperative anaemia
Yes	161(47.1%)	181(52.9%)	17.69	11.38–27.50	<0.001
No	27(4.8%)	537(95.2%)	1.00	Reference	Reference
Anaesthesia
Regional	102(14.0%)	626(86.0%)	0.17	0.12–0.25	<0.001
General	86(48.3%)	92(51.7%)	1.00	Reference	Reference
Prolonged operation time
Yes	111(55.5%)	89(44.5%)	10.19	7.07–14.69	<0.001
No	77(10.9%)	629(89.1%)	1.00	Reference	Reference
Prolonged labour
Yes	38(46.9%)	43(53.1%)	3.46	2.09–5.75	<0.001
No	73(20.3%)	286(79.7%)	1.00	Reference	Reference

*significant p = <0.05