Table 5.

Time from Admission (h) to Delivery Stratified by Fetal Station

	Ballotable	−3	−2	−1	0	+1/ + 2	P a
Spontaneous labor	9.4 (6.9, 11.4); n = 59	9.8 (7.0, 13.8); n = 414	10.4 (7.7, 14.0); n = 573	10.4 (7.7, 13.5); n = 942	8.6 (6.6, 11.6); n = 175	9.5 (6.9, 11.2); n = 14	0.27
Induction of labor	17.2 (13.3,24.0); n = 125	17.1 (12.3,22.7); n = 464	15.9 (11.7,21.0); n = 619	11.1 (8.3, 15.2); n = 576	8.8 (7.0, 12.1); n = 55	12.8 (10.0, 15.6); n = 2	<0.001

Data are median (interquartile range) unless otherwise specified. The time from admission to delivery for women who presented in spontaneous labor ranges from 2.1 to 37.8 h and for women who presented for an induction of labor ranges from 2.4 to 76.1 h.

^aJonckheere-Terpstra test for trend.