Effectiveness of emergency obstetric care training at the regional level in Ukraine: a non-randomized controlled trial

Table 4 Effect of the AIP training on maternal death: difference in difference (DID) estimation

Outcome variable	Referents, N (per 100,000)		Cases, N (per 100,000)		DID		p
Outcome variable	Before n=38,076	After n=42,872	Before n=47,992	After n=61,330	DID estimator (95%CI)	OR (95%CI)	p
Maternal Mortality Ratio	5 (13.1)	5 (11.7)	7 (14.6)	13 (21.2)	8.1 (-14.8 to 31.0)	1.64 (0.35-7.66)	0.490
Maternal Mortality Ratio related to postpartum hemorrhage	2 (5.25)	1 (2.33)	2 (4.17)	3 (4.89)	3.6 (-8.2 to 15.5)	2.64 (0.13-52.8)	0.546

N in each box of the second row corresponds to number of live-births in the groups “before” and “after” the AIP training implementation. N in boxes related to maternal mortality ratio are numbers of women who died. Index is calculated per 100,000 live-births. Difference in difference (DID) estimator was estimated using linear regression model. DID presented as estimator (per 100,000) with 95% CI, and OR with 95%CI. The P-value is presented for DID estimator. CI: confidence interval; OR: odds ratio

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