Table 5.

Adjusted duration of labor (hours) in term nulliparas by presence of fetal anomaly with median traverse times reported as hours (95th percentile)

	No anomaly (N = 43,915)	Anomaly (N = 2,728)	p-Value for trend
Cervical dilation, cm
3–4	4.0 (10.6)	4.1 (11.6)	0.005
4–5	3.7 (8.7)	3.7 (8.3)	0.001
5–6	3.2 (7.4)	3.1 (7.0)	<0.0001
6–7	2.9 (6.4)	2.7 (5.9)	0.61
7–8	2.5 (6.0)	2.5 (5.7)	0.002
8–9	2.2 (5.2)	1.9 (4.9)	<0.0001
9–10	1.5 (3.7)	2.0 (4.3)	<0.0001
4–10	5.2 (12.4)	5.4 (13.5)	0.39
Second stage without epidural	0.7 (3.2)	0.7 (3.2)	0.81
Second stage with epidural	1.3 (4.1)	1.3(4.0)	0.39

Note: Adjusted model controlled for age, BMI, race, induction, augmentation, epidural (first stage only), and birth weight.