. 2022 Feb 22;22:145. doi: 10.1186/s12884-022-04458-9

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
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

Outcome variable

Referents, N
(per 100,000)

Cases, N
(per 100,000)

DID

Before
n=38,076

After
n=42,872

Before
n=47,992

After
n=61,330

DID estimator (95%CI)

OR (95%CI)

Maternal Mortality Ratio

(13.1)

(11.7)

(14.6)

(21.2)

8.1

(-14.8 to 31.0)

1.64

(0.35-7.66)

0.490

Maternal Mortality Ratio related to postpartum hemorrhage

(5.25)

(2.33)

(4.17)

(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