Change in timing of induction protocol in nulliparous women to optimise timing of birth: results from a single centre study

Table 3 Association between Post versus Pre-intervention periods and In-hours delivery

	In-hours birth n (%)		Model 1 (n = 755) Odds ratio (95% CI) (p-value)	Model 2 (n = 674) Odds ratio (95% CI) (p-value)	Model 3 (n = 589) Odds ratio (95% CI) (p-value)	Model 4 (n = 749) Odds ratio (95% CI) (p-value)
	No	Yes
Period:
Pre-intervention	167 (58.6)	118 (41.4)	1.00 (Ref)	1.00 (Ref)	1.00 (Ref)	1.00 (Ref)
Post-intervention	219 (46.6)	251 (53.4)	1.62 (1.20, 2.18) P < 0.01	1.56 (1.15, 2.12) P < 0.01	1.38 (0.97, 1.97) P = 0.07	1.47 (1.07, 2.01) P = 0.02

Model 1: Unadjusted
Model 2: Adjusted for age at delivery and gestation
Model 3: Adjusted for age at delivery, gestation, ≥ 2 ripening factors, post-date, mode of birth, and ARM in target-time
Model 4: Same as model 3 and using multiple imputation (n = 5 imputed datasets)

ISSN: 1471-2393