The Effect of Ultrasound-Measured Preinduction Cervical Length on Delivery Outcome in a Low-Resource Setting

Table 5

Regression analysis of preinduction cervical length vs. duration of labour with confounding variables.

Statistics	Nil	Parity			Age
		0	1–4	>4	<20	20–29	30–39	≥40
Model fit
Regression	0.681	0.701	0.639	0.794	1.000	0.552	0.745	0.849
R^2 (%)	46.4	67.5	74.4	65.5	67.4	77.7	55.4	72.1
Std error estimate	2.13	2.22	2.312	1.239	—	2.303	2.049	1.583
ANOVA
F value	50.128	14.505	22.732	10.209	—	10.07	27.377	18.092
value	0.001	0.002	0.001	0.019	—	0.004	0.001	0.004
Coefficient
t-value	7.08	3.809	4.768	3.195	—	3.174	5.232	4.253
value	0.001	0.002	0.001	0.019	—	0.004	0.001	0.004