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Table 3 Top ten classes of total BDs and ethnic distribution in Liuzhou

From: The association between ambient air pollution and birth defects in five major ethnic groups in Liuzhou, China

Birth defects Case
(n)
Incidence
(%)
Han
n (%)
Zhuang
n (%)
Dong
n (%)
Miao
n (%)
Yao
n (%)
Congenital heart disease 163 25.67 70 (11.02) 63 (9.92) 14 (2.20) 11 (1.73) 4 (0.63)
Polydactyly 70 11.02 31 (4.88) 22 (3.46) 5 (0.79) 8 (1.26) 1 (0.16)
Cleft lip and/or cleft palate 67 10.55 19 (2.99) 32 (5.04) 4 (0.94) 5 (0.79) 2 (0.31)
Severe thalassemia 40 6.30 13 (2.05) 19 (2.99) 1 (0.16) 5 (0.79) 1 (1.59)
Ear anomalies 38 5.98 20 (3.15) 15 (2.36) 2 (0.31) 1 (0.16) 0
Hypospadias 25 3.94 12 (1.89) 8 (1.26) 4 (0.63) 1 (0.16) 0
Congenital syndactyly 24 3.78 8 (1.26) 10 (1.57) 2 (0.31) 4 (0.63) 0
Congenital clubfoot 22 3.46 10 (1.57) 7 (1.10) 3 (0.47) 2 (0.31) 0
Hydrocephaly 21 3.31 11 (1.73) 6 (0.94) 1 (0.16) 2 (0.31) 1 (0.16)
Cystic hygroma 20 3.15 10 (1.57) 7 (1.10) 2 (0.31) 1 (0.16) 0
Bart’s Syndrome 13 2.05 6 (0.94) 5 (0.70) 1 (0.16) 1 (0.16) 0
Other Birth Defects 42 6.61 30 (4.72) 10 (1.57) 0 1 (0.16) 1 (0.16)