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 2. Estimated prevalence of tuberculosis in Viet Nam, according to sputum smear-positive and bacteriologically confirmed cases in survey participants ≥ 15 years old, 2006–2007

Characteristic No. of survey participants Sputum smear-positive cases
 Bacteriologically confirmed cases
No. of cases Weighted prevalence (per 100 000)a 95% CI P-value No. of cases Weighted prevalence (per 100 000)a 95% CI P-value
Total 94 179 174 196.8 149.6–243.9 269 307.2 248.8–365.6
Sexb < 0.001 < 0.001
Male 42 603 142 351.1 262.3–439.9 212 536.4 431.3–641.5
Female 51 567 32 69.3 39.2–99.3 57 117.8 75.0–160.7
Age (years)c < 0.001d < 0.001d
15–24 20 935 7 42.2 11.8–72.6 < 0.001e 10 54.8 21.9–87.6 < 0.001e
25–34 18 682 16 83.5 23.7–143.2 0.002e 27 136.4 62.8–210.0 < 0.001e
35–44 19 794 47 246.7 156.8–336.6 0.063e 63 321.0 221.9–420.0 0.695e
45–54 16 285 41 233.5 144.7–322.2 0.315e 59 343.9 227.6–460.2 0.463e
55–64 8 137 24 328.7 187–470.4 0.030e 38 599.0 288.2–909.9 0.012e
≥ 65 10 328 39 429.3 238.8–619.7 < 0.001d 72 764.4 492.0–1036.9 < 0.001e
Area 0.267
Urban 26 357 52 203.2 132.2–274.2 0.862f 72 282.0 188.3–375.7 0.151f
Remote 27 545 37 134.3 92.1–176.5 0.027f 63 232.3 131.5–333.0 0.119f
Rural 40 277 85 219.4 144.6–294.2 0.170f 134 344.2 258.8–429.7 0.106f
Region 0.087
North 45 679 71 162.5 117.0–208.0 0.129g 124 286.1 217.7–354.6 0.474g
Central 14 656 21 152.2 95.7–208.7 0.212g 29 209.4 131.6–287.2 0.048g
South 33 844 82 256.4 151.6–361.1 0.053g 116 367.4 249.2–485.7 0.121g

CI, confidence interval.
a Weighted for stratification by area, differential population growth between 1999 and 2006 and different cluster size.
b Data on sex were missing for 9 cases.
c Data on age were missing for 18 cases.
d P-value for trend.
e P-value for the difference between this age group compared with all other age groups combined.
f P-value for the difference between this area compared with the other two areas together.
g P-value for the difference between this region compared with the other two regions together.