Table 3.

Pregnancy and delivery outcomes for the study population

	Mothers ≤ 39 n = 71,472		Mothers 40–44 n = 35,429		Mothers ≥ 45 n = 2229		p-value1	p-value2	p-value3	p-value4
	n	%	n	%	n	%
Pre-eclampsia/eclampsia							< 0.001	< 0.001	< 0.001	< 0.001
Yes	1776	2.5	1365	3.9	146	6.6
Gestational diabetes							< 0.001	< 0.001	< 0.001	< 0.001
Yes	935	1.3	917	2.6	86	3.9
Gestational hypertension							< 0.001	< 0.001	< 0.001	0.017
Yes	679	1.0	549	1.5	49	1.2
Premature contractions							0.008	0.011	0.055	0.169
Yes	229	0.31	82	0.2	2	0.1
Infection							0.966	0.815	0.925	0.873
Yes	200	0.3	102	0.3	6	0.3
Haemorrhage, prepartum							0.910	0.525	0.677	0.509
Yes	25	0.0	11	0.0	1	0.0
Mode of delivery							< 0.001	< 0.001	< 0.001	< 0.001
Caesarean section (elective)	5328	7.5	4931	13.9	455	20.4
Caesarean section (emergency)	4931	6.9	4249	12.0	370	16.6
Instrumental deliveryb	3592	5.0	2255	6.4	118	5.3
Epidural							< 0.001	< 0.001	< 0.001	0.001
Yes	14,454	20.2	6809	19.2	363	16.3
Haemorrhage, intrapartum							< 0.001	< 0.001	< 0.001	< 0.001
Yes	1242	1.7	1206	3.4	124	5.5
Haemorrhage, postpartum							< 0.001	< 0.001	< 0.001	0.010
Yes	3013	4.2	1658	4.7	131	5.9
Paracervical block a							0.571	0.296	0.803	0.973
Yes	922	1.5	371	1.4	20	1.4
Pethidine a							0.019	0.013	0.258	0.063
Yes	1738	2.8	667	2.5	47	3.3
Pudendal block a							< 0.001	< 0.001	0.402	0.617
Yes	1446	2.4	771	2.9	38	2.7

^aWomen delivered by caesarean section were excluded

^bVaginal delivery where either thongs or vacuum extraction was used

¹Across all age groups, Person’s chi-square

²≤39 vs. 40–44, Pearson’s chi-square

³≤39 vs. ≥45, Pearson’s chi-square

⁴40–44 vs. ≥45, Pearson’s chi-square