Twin versus singleton pregnancies: the incidence, pregnancy complications, and obstetric outcomes in a Nigerian tertiary hospital

Figures & data

Table 1 Maternal and fetal characteristics of the study and control groups

Characteristics	Singleton gestation	Twin gestation	t-test	P-value
1 Mean maternal age (years)	27 ± 4.70	30 ± 2.33	4.40	<0.05
2 Mean parity	1.96 ± 1.87	2.7 ± 2.33	2.48	<0.05
3 Mean gestational age (weeks)	38.7 ± 2.40	34 ± 5.20	1.97	<0.05
4 Mean birth weight (kg)	3.14 ± 0.73	2.3 ± 1.00	43.14	<0.05

Table 2 Pregnancy complications in twin versus singleton deliveries

Variables	Singleton	Twin	Odds ratio	95% CI
1. Malpresentation
Yes	6	16	2.98	1.04–9.7
No	94	84	Ref
2. Cord presentation/prolapse
Yes	2	12	6.68	1.42–62.61
No	98	88	Ref
3. PROM
Yes	6	22	4.42	1.62–13.90
No	94	78	Ref
4. Hypertensive disorders of pregnancy
Yes	7	14	3.21	1.8–23.6
No	93	86	Ref
5. Cesarean section
Yes	20	42	2.90	1.48–5.76
No	80	58	Ref

Note: Odds ratio of 1.00.

Abbreviation: PROM, Premature rupture of membranes.

Table 3 Comparison of obstetric outcome in singleton and twin deliveries

Variables	Singleton	Twin	Odds ratio	95% CI
1. Preterm delivery
Yes	8	36	6.47	2.70–17.05
No	92	64	Ref
2. Low birth weight
Yes	12	56	9.33	4.35–20.95
No	88	44	Ref
3. Low Apgar score
Yes	10	40	6.00	2.67–14.39
No	90	60	Ref
4. Perinatal death
Yes	10	22	2.54	1.07–6.36
No	90	78	Ref

Note: Odds ratio of 1.00.