Table 1.

Demographic characteristics of the intervention group and the control group.

	Control Group	Intervention Group			p Value (Control and Intervention)
Regions	Liulin	Zhongyang	Jiaokou	Total
Number of childbearing women	7037	9132	7516	16648
Number of births	2139	3318	2580	5898
Age in year (Mean ± SD)	26.3 ± 4.6	26.8 ± 5.4	25.9 ± 5.6	26.4 ± 5.2	p = 0.1803
Education (Number and Percentage)					p = 0.1257
Primary school or below	1203 (17.1)	1102 (12.1)	929 (12.4)	2031 (12.2)
Junior high school	4060 (57.7)	5622 (61.6)	4550 (60.5)	10172 (61.1)
Senior high school	1147 (16.3)	1567 (17.2)	1330 (17.7)	2897 (17.4)
College or above	626 (8.9)	841 (9.2)	707 (9.4)	1548 (9.3)