Table 2 Socio-demographic characteristics of women in different preconception risk factor classification categories

Age

≤25

24.7%

21.6%

26.3%

22.4%

14.7%

21.3%

25–30

46.3%

47.4%

46.7%

44.1%

38.5%

46.0%

30–35

19.5%

21.2%

18.2%

20.9%

27.1%^*

20.1%

≥35

9.6%

9.8%

8.7%

12.6%

19.8%^*

12.6%^*

Area

Rural area

93.9%

89.6%

94.0%

94.0%

94.3%

92.2%

Race

Han

92.7%

91.6%

92.5%

88.7%

84.0%^*

84.2%^*

Education

Secondary school or lower

71.5%

64.8%^*

69.4%

71.8%

77.4%

75.5%

High school

18.7%

19.7%

18.7%

17.1%

13.8%^*

16.6%

College or higher

9.8%

15.5%^*

11.8%

11.1%

8.8%

8.0%