Table 1 Prevalence rate of different factors or characters
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) |