Table 6.

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

	No anomaly (N = 47,608)	Anomaly (N = 2,618)	p-Value for trend
Cervical dilation, cm
3–4	3.4 (9.4)	3.4 (10.4)	<0.0001
4–5	2.5 (6.7)	3.1 (7.2)	0.010
5–6	2.5 (6.4)	2.5 (6.2)	<0.0001
6–7	2.1 (5.6)	1.8 (5.0)	<0.0001
7–8	1.7 (4.5)	1.8 (3.8)	<0.0001
8–9	1.5 (4.1)	1.6 (4.8)	0.92
9–10	1.1 (3.4)	1.1 (3.5)	0.007
4–10	3.7 (9.6)	3.7 (10.1)	0.009
Second stage without epidural	0.2 (1.0)	0.2 (1.0)	0.65
Second stage with epidural	0.4 (1.6)	0.3(1.5)	0.42

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