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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