. Author manuscript; available in PMC: 2016 Oct 1.

Published in final edited form as: Am J Obstet Gynecol. 2015 Jul 9;213(4):538.e1–538.e9. doi: 10.1016/j.ajog.2015.06.064

Table 2.

Serious maternal complications and delivery route, by gestational age at delivery

Outcome, n (%)^*	Gestational age at delivery			P-value^†
Outcome, n (%)^*	23–27 weeks n=597	28–31 weeks n=919	32–33 weeks n=1143	P-value^†
Composite serious maternal complications	67 (11.5)	86 (9.5)	70 (6.3)	<.001
Hemorrhage	41 (7.0)	46 (5.1)	34 (3.1)	<.001
Infection	16 (2.7)	27 (2.9)	15 (1.3)	.03
ICU admission	20 (3.4)	36 (3.9)	33 (2.9)	.43
Death	1 (0.2)	1 (0.1)	0 (0.0)	.33
Delivery route				<.001
Classical cesarean (CCD)	154 (25.8)	89 (9.7)	29 (2.5)
Low transverse cesarean (LTCD)	145 (24.3)	365 (39.7)	394 (34.5)
Low vertical cesarean (LVCD)	13 (2.2)	10 (1.1)	6 (0.5)
Vaginal (VD)	285 (47.7)	455 (49.5)	714 (62.5)

all 2659 women had complete data to define the outcomes of infection, ICU admission, and death; 63 had missing data to define hemorrhage; 61 had missing data to define MM

^†

based on the chi-square or Fisher’s exact test