From: The association between ambient air pollution and birth defects in five major ethnic groups in Liuzhou, China
Ethnic
Number of birth defect(n)
Prevalence of Birth defects (%)
Number of perinatal infants(n)
Han
278
1.75
15,907
Zhuang
244
2.07
11,799
Dong
49
2.59
1890
Miao
45
2.35
1918
Yao
13
2.57
505
Others
6
1.15
530