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Table 1 Absolute and relative frequencies of demographic variables and risk factors among individuals from Yanomami, Brazil

From: Seroprevalence of hepatitis B, C, and D and associated factors in the semi-isolated Yanomami Amazonian indigenous community

  

Yanomami villages

 

Alapusi

Castanha/Ahima

Gasolina

Taibrapa

Total

p

n = 78

n = 126

n = 105

n = 121

n = 430

n (%)

n (%)

n (%)

n (%)

n (%)

Gender

Male

31 (39.7)

62 (49.2)

39 (37.1)

48 (39.7)

180 (41.9)

0.22

Female

47 (60.3)

64 (50.8)

66 (62.9)

73 (60.3)

250 (58.1)

 

Age groupa

(years)

0–15

19 (24.4)

17 (13.5)

24 (22.9)

34 (28.1)

94 (21.9)

 

16–30

27 (34.6)

51 (40.5)

36 (34.3)

36 (29.8)

150 (34.9)

 

31–45

15 (19.2)

26 (20.6)

21 (20.0)

28 (23.1)

90 (20.9)

0.56

46–60

10 (12.8)

20 (15.9)

16 (15.2)

13 (10.7)

59 (13.7)

 

> 60

6 (7.7)

8 (6.3)

8 (7.6)

10 (8.3)

32 (7.4)

 

Year of Birth

Before 1995

33 (42.3)

52 (41.3)

53 (50.5)

60 (49.6)

198 (46.0)

 

After 1995

44 (56.4)

70 (55.5)

52 (49.5)

61 (50.4)

227 (52.8)

0.76

Risk Factors

Piercing

72 (92.3)

121 (96.0)

100 (95.2)

116 (95.9)

409 (95.1)

0.34

Tattoo

43 (55.1)

88 (69.8)

75 (71.4)

69 (57.0)

275 (63.9)

0.01

Contact/ miners

29 (37.2)

43 (34.1)

49 (46.7)

25 (20.7)

146 (33.9)

< 0.01

  1. aAge not provided for 10 samples; before 1995: individuals born before HBV vaccine implementation and after 1995: individuals born after HBV vaccine implementation. p < 0.05 was considered statistically significant