https://doi.org/10.17037/DATA.00002373
An individual-level analytical dataset generated from two consecutive nationally representative surveys conducted in Viet Nam in 2007 and 2017. The source data used to generated this combined dataset may be requested from the Viet Nam National Lung hospital by e-mailing bvptw@bvptw.org.
R code and STATA DO files written and used to merge the two consecutive nationally representative surveys into a single individual-level analytical dataset may be obtained from https://doi.org/10.17037/DATA.00002373.
Cross-sectional surveys using multistage cluster sampling based on the estimated prevalence of TB in the country at the time of the study. One survey was conducted in 2007 and another in 2017. Each cluster was a district. Individuals living in enumerated households were eligible for inclusion in the study if >15 and lived in the household for >3 months (2007 survey) but >2 weeks in the 2017 survey. Participants were screened for TB based on self-reported symptoms and chest radiograph results. Tuberculosis case definition was having had a smear test and at least one positive LJ culture.
An asset index was constructed using principal component analysis (PCA) of size variables (1) the presence of clay floors, (2) wood as fuel for cooking, (3) ownership of a stereo system, (4) television, (5) motorbike, or (6) car. Using the index, households were divided into four groups based on their relative wealth. “Neighbourhood” provincial poverty variables were generated by combining clusters into provinces and imputing provincial poverty values based on data from the World Bank.
| Var# | Data field | Description | Answer code | Answer label |
| 1 | newID | Individual study id, of format A-BB-CCC-DDDD, where A=survey number, BB=cluster, CCC=household, and DDDD=individual. | ||
| 2 | age_final | age in years | ||
| 3 | agegroup | categorised age variable | ||
| 1 | 15-24 | |||
| 2 | 25-34 | |||
| 3 | 35-44 | |||
| 4 | 45-54 | |||
| 5 | 55-64 | |||
| 6 | >65 | |||
| 4 | awe | Absolute wealth estimate generated based on Hruschka et al. | ||
| 5 | cough | Self-reported cough. If a cough (more than 2 weeks) was reported in either then screening or in-depth interview. | ||
| 6 | pca_continuous | Generated from households that ownthe following assets. | ||
| 1 | Clay floor | |||
| 2 | Cooking with wood | |||
| 3 | Stereo | |||
| 3 | TV | |||
| 4 | Motorbike | |||
| 5 | Car | |||
| 7 | pca_quartile | pca_quartile | ||
| 8 | poverty_2009 | Poverty: GSO-WB poverty headcount (%) | ||
| 9 | poverty_2013 | MOLISA income-based poverty rate | ||
| 10 | sex_final | Participant sex | ||
| 0 | Female | |||
| 1 | Male | |||
| 11 | survey | Survey year | ||
| 0 | 2007 survey | |||
| 1 | 2017 survey | |||
| 12 | symptoms_any | If on symptom screen an individual had EITHER a fever, night sweats, weight loss, a cough for more than two weeks, or blood in sputum=1, otherwise 0. | ||
| 1 | Individual had EITHER a fever, night sweats, weight loss, a cough for more than two weeks, or blood in sputum on symptom screen | |||
| 0 | None of the above on symptom screen | |||
| 13 | tbcase | TB case definition | ||
| 0 | Not a TB case | |||
| 1 | TB case | |||
| 14 | Wtotps | Total weight for differential cluster size, participation by age and sex, stratification by areas plus postratification weight: weight for divergence from general population curve by age. | ||
| 15 | previoustb | Had TB treatment in the past. | ||
| 16 | stratum_id | Stratum ID | ||
| 1 | Urban | |||
| 2 | Remote | |||
| 3 | Rural | |||
| 17 | zone | Geographic zone | ||
| 1 | North | |||
| 2 | Centre | |||
| 3 | South |