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Table 2 Characteristics of participants found positive for anti-A(H5) antibodies, Cambodia, 2006−2010

From: Environmental contamination and risk factors for transmission of highly pathogenic avian influenza A(H5N1) to humans, Cambodia, 2006-2010

Year of investigation

All n (%)

2006 n (%)

2007 n (%)

2009 n (%)

2010 n (%)

p value

Participants

2,364

674

700

624

366

 

Positive for anti-A(H5)

35 (1.5)

7 (1.0)

18 (2.6)

10 (1.6)

0

 

Positive participants

 Gender - male

19 (54.3)

6 (85.7)

8 (44.4)

5 (50.0)

-

0.179

 Age (years)

  Median (min. - max.)

16 (3-77)

12 (4-18)

14.5 (3-77)

26.5 (5-70)

-

0.239

  Means

24.2

11.4

25.7

30.6

-

 

 Age group

  0−4 years

4 (11.4)

2 (28.6)

2 (11.1)

0

-

0.245

  5−19 years

17 (48.6)

5 (71.4)

9 (50.0)

3 (30.0)

-

 

  20−39 years

6 (17.1)

0

2 (11.1)

4 (40.0)

-

 

  40−59 years

3 (8.6)

0

2 (11.1)

1 (10.0)

-

 

  >59 years

5 (14.3)

0

3 (16.7)

2 (20.0)

-

 

  Age under 20

21 (60.0)

7 (100)

11 (61.1)

3 (30.0)

-

0.015

 Occupation

  Farmer

15 (42.9)

1 (14.3)

7 (38.9)

7 (70.0)

-

0.123

  Worker - rubber plantation

1 (2.9)

0

1 (5.6)

0

-

 

  Student or child

19 (54.3)

6 (85.7)

10 (55.6)

3 (30.0)

-

 
  1. Participants of 2008 survey were excluded from the analysis (Kandal province, n = 394, military, mainly male aged 18 − 35 years old). None of them tested positive for anti-A(H5) antibodies