Selective versus routine use of episiotomy for vaginal births in Shanghai hospitals, China: a comparison of policies

Table 2 Current pregnancy complications (weighted)

Characteristics	Routine episiotomy (1353)		Selective episiotomy (4125)		P
	n	%	n	%
ART	19	1.38	88	2.13	0.08
Hyperthyroidism	8	0.61	26	0.63	0.96
Hypothyroidism	99	7.29	202	4.89	0.05
Other thyroidism	14	1.03	68	1.65	0.10
PIH	191	14.1	496	12.02	< 0.05
GDM	146	10.82	415	10.05	0.42
placental abruption	1	0.05	9	0.22	0.19
PROM	317	23.42	1022	24.77	0.32
Prenatal stillbirth	0	0.05	3	0.08	0.39

ART Assisted reproductive technology, PIH Pregnancy-induced hypertension syndrome, GDM Gestational Diabetes Mellitus, PROM Premature rupture of membranes

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