The evaluation of

Table 3 Intervention effects on utilization of prenatal health care: difference in difference (D-in-D) estimation

Outcome variable	No covariate			With covariates
	D-in-D estimator (SE)	R ²	P	D-in-D estimator (SE)	R ²	P
Had a prenatal visit	0.058 (0.008)	0.054	0.001	0.052 (0.008)	0.085	0.001
First prenatal visit in first trimester	0.134 (0.015)	0.083	0.001	0.120 (0.015)	0.103	0.001
Had a hospital delivery	0.231 (0.012)	0.210	0.001	0.225 (0.013)	0.244	0.001
Was mobilized to hospital delivery	-0.050(0.016)	0.181	0.001	-0.037 (0.021)	0.187	0.073

The difference in difference estimator was estimated using linear regression model adjusting for covariates including women's age, women's ethnicity, parity, the distance between village and township, and average income of village per year.

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