Table 2.

Adverse obstetric events associated with multiple gestations in Lagos, Nigeria

Pregnancy-related event	Single pregnancies (n=4,416) No. (%)	Multiple pregnancies (n=157) No. (%)	Crude OR (95% CI)	Adjusted$ OR (95% CI)
Antepartum haemorrhage	47 (95.9)	2 (4.1)	1.20 (0.29-4.98)	-
Premature rupture of the membranes	47 (95.9)	2 (4.1)	1.20 (0.29-4.98)	-
Hypertensive disorders	268 (91.2)	26 (8.8)	3.07 (1.98-4.76)	3.16 (1.97-5.06)***
Prolonged/obstructed labour	413 (98.3)	7 (1.7)	0.45 (0.21-0.97)	0.46 (0.21-1.00)*
Caesarean delivery	1879 (95.5)	89 (4.5)	1.77 (1.28-2.44)	1.70 (1.21-2.38)**

$Adjusted for maternal age, ethnicity, occupation, parity, and antenatal care;

*p=0.05;

**p<0.01;

***p<0.001;

CI=Confidence interval;

OR=Odds ratio