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Table 1 Prevalence rate of different factors or characters

From: Prevalence of birth defects and risk-factor analysis from a population-based survey in Inner Mongolia, China

Factors

Delivery

Cases

Prevalence rate(1/10000)

Ethnicity

   

Han Chinese

43503

678

155.9(144.1-167.6)

Mongolian

17051

252

147.8(129.6-166.0)

Other

1975

31

157.0(106.9-222.0)

Living areas

   

Urbana

26649

332

124.6(111.1-138.1)

Rural

35895

644

179.4(165.5-193.3)

Time of pregnancy

   

1

46186

574

124.3(114.6-134.8)

2

14426

280

194.1(172.9-218.0)

3

1774

91

513.0(420.1-626.1)

Maternal age(years)

   

<25

27761

444

159.9(145.8-175.4)

25--

21098

306

145.0(129.8-162.0)

30--

9658

128

132.5(111.6-157.4)

35--

4009

80

199.6(160.8-247.8)