Bulletin of the World Health Organization

National survey of tuberculosis prevalence in Viet Nam

Nguyen Binh Hoa, Dinh Ngoc Sy, Nguyen Viet Nhung, Edine W Tiemersma, Martien W Borgdorff & Frank GJ Cobelens

Volume 88, Number 4, April 2010, 273-280

Table 1. Data for productive cough and chest X-ray results, by subgroups, among 87 314 participants in a tuberculosis prevalence survey in Viet Nam, 2006–2007

No. with interview and CXR results CXR abnormal and productive cough
CXR abnormal and no productive cough
CXR normal and productive cough
CXR normal and no productive cough
No. % P-value No. % P-value No. % P-value No. % P-value
Total 87 314 518 0.6 2972 3.4 3522 4.0 80 302 92.0
Sex < 0.001 < 0.001 < 0.001 < 0.001
Male 39 776 369 0.9 1758 4.4 2126 5.3 35 523 89.3
Female 47 530 149 0.3 1214 2.6 1396 2.9 44 771 94.2
Unknown 8 8
Age (years) < 0.001a < 0.001a < 0.001a < 0.001a
15–24 19 274 14 0.1 < 0.001b 198 1.0 < 0.001b 362 1.9 < 0.001b 18 700 97.0 < 0.001b
25–34 17 065 38 0.2 < 0.001b 237 1.4 < 0.001b 602 3.5 < 0.001b 16 188 94.9 < 0.001b
35–44 18 584 63 0.3 < 0.001b 481 2.6 < 0.001b 790 4.3 0.338b 17 250 92.8 < 0.001b
45–54 15 338 103 0.7 0.211b 656 4.3 < 0.001b 718 4.7 < 0.001b 13 861 90.4 < 0.001b
55–64 7 685 96 1.2 < 0.001b 436 5.7 < 0.001b 450 5.9 < 0.001b 6 703 87.2 < 0.001b
≥ 65 9 351 204 2.2 < 0.001b 963 10.3 < 0.001b 600 6.4 < 0.001b 7 584 81.1 < 0.001b
Unknown 17 1 16 94.1
Area
Urban 23 903 142 0.6 0.646c 937 3.9 0.151c 810 3.4 0.262c 22 014 92.1 0.862c
Remote 26 694 188 0.7 0.159c 686 2.6 0.014c 1440 5.4 0.006c 24 380 91.3 0.306c
Rural 36 717 188 0.5 0.111c 1349 3.7 0.322c 1272 3.5 0.072c 33 908 92.3 0.280c
Region
North 41 436 273 0.7 0.083d 1240 3.0 0.083d 2190 5.3 < 0.001d 37 733 91.1 0.009d
Central 14 146 84 0.6 0.565d 421 3.0 0.736d 498 3.5 0.365d 13 143 92.9 0.265d
South 31 732 161 0.5 0.063d 1311 4.1 0.062d 834 2.6 < 0.001d 29 426 92.7 0.027d

CXR, chest X-ray.
a P-value for trend.
b P-value for the difference between this age group compared with all other age groups combined.
c P-value for the difference between this area compared with the other two areas together.
d P-value for the difference between this region compared with the other two regions together.

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