Table 2.

Association between interpregnancy interval and complications of pregnancy beyond 20 weeks gestation in the subsequent pregnancy.

Complications during index pregnancy beyond 20 weeks’ gestation (n = 641) a	Miscarriage to LMP interval ⩾6 months (n = 410)	Miscarriage to LMP interval <6 months (n = 231)	p
APH due to placenta praevia b	2 (0.5%)	0 (0.0%)	0.538
Threatened miscarriage	8 (2.0%)	7 (3.0%)	0.420
Required cervical cerclage for cervical incompetence	2 (0.5%)	1 (0.4%)	1.000
Hypertensive disorders of pregnancy	17 (4.1%)	4 (1.7%)	0.111
Preterm contractions and labour	19 (4.6%)	5 (2.2%)	0.133
Premature rupture of membranes (PROM)	16 (3.9%)	6 (2.6%)	0.500
Intrauterine foetal death (IUFD)	0 (0.0%)	2 (0.9%)	0.130
Intrauterine growth retardation	1 (0.2%)	2 (0.9%)	0.557

LMP: last menstrual period; APH: antepartum haemorrhage.

^aMore than one complication can apply.

^bHypertensive disorders of pregnancy = non-proteinuric (gestational) hypertension, preeclampsia, eclampsia.