Table 3.

Cumulative duration required for each 1-cm expansion of cervical dilation in the two groups.

	Groups
	Trial of labor		Non-trial of labor
Cervical dilation (cm)	Number of women	Duration (hours)	Number of women	Duration (hours)	P
3–4	82	0.74 (1.27)	118	1.02 (1.62)	0.14
4–5	39	0.49 (1.91)	66	0.57 (1.45)	0.61
5–6	34	0.33 (1.89)	52	0.36 (2.76)	0.69
6–7	24	0.29 (1.81)	51	0.32 (2.63)	0.03
7–8	39	0.25 (0.74)	63	0.28 (2.07)	0.00
8–9	81	0.22 (0.56)	95	0.27 (1.27)	0.00
9–10	96	0.21 (0.46)	127	0.26 (1.26)	0.00

Note: data that exceeded 1 cm of expansion between examinations were not included in the analysis. Data are median (95th percentile).