Caesarean section by maternal age group among singleton deliveries and primiparous Japanese women: a secondary analysis of the WHO Global Survey on Maternal and Perinatal Health

Table 2 Pregnancy and labour complication by age groups in primiparous women with singleton births N = 1747

	Maternal age group, years						Adjusted x ², P
	≤29		30–34		≥35
	(n = 702)		(n = 677)		(n = 368)
	n	%	n	%	n	%
Maternal hypertension^a	30	4.3	41	6.1	44	12.0	<0.001
PROM	171	24.4	157	23.2	90	24.5	0.85
Fetal growth impairment	17	2.4	13	1.9	10	2.7	0.68
Preterm birth (<37 weeks)	32	4.5	35	5.2	32	8.7	<0.05
Low birth weight (<2500 g)	77	10.1	70	10.3	50	13.7	0.11
Instrumental vaginal delivery	53	7.6	59	8.7	43	11.7	0.08
Elective CS	29	4.1	46	6.8	38	10.3	<0.01
Emergency antepartum CS	16	2.3	25	3.7	24	6.5	<0.05
Intrapartum CS	44	6.3	47	6.9	36	9.8	0.20

CS caesarean section, PROM prelabour rupture of membrane
^aMaternal hypertension was defined as presence of pregnancy-induced hypertension, preeclampsia and eclampsia
Study-design based Pearson’s chi-2 test was calculated

ISSN: 1471-2393