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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)