The pregnancy outcomes of women with SARS-CoV-2 infection in the first trimester ---a longitudinal cohort study

Table 3 Pregnancy outcomes between the two groups

	The study group n = 468	The control group n = 613	Z/χ2	P
Delivery weeks [M(P₂₅ ~ P₇₅),w]	39(38 ~ 40)	39(38 ~ 40)	-0.005	0.996
Delivery mode[n(%)]
Vaginal delivery	304(64.96)	411(67.05)	1.798	0.407
Forceps	28(5.98)	26(4.24)
Cesarean section	136(29.06)	176(28.71)
Total labor duration [M(P₂₅ ~ P₇₅), min]	470(291 ~ 699)	410(292 ~ 655)	-1.732	0.083
Precipitate labor [n(%)]	13(2.78)	20(3.26)	0.211	0.646
Placental adhesion [n(%)]	20(4.27)	29(4.73)	0.128	0.720
Premature rupture of membranes [n(%)]	95(20.30)	126(20.55)	0.011	0.918
Postpartum hemorrhage [n(%)]	35(7.48)	42(6.85)	0.158	0.691
Oligohydramnios [n(%)]	13(2.78)	19(3.10)	0.757	0.096
HDP [n(%)]	24(5.13)	11(1.79)	9.415	0.002
Gestational hypertension[n(%)]	13(2.78)	5(0.82)	6.240	0.012
Preeclampsia [n(%)]	11(2.35)	6(0.98)	3.226	0.072

HDP: hypertensive disorders of pregnancy (including gestational hypertension and preeclampsia)

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