| Description of data capture |
The sampling frame for this study was adults (≥18 years) enrolled in the ZAMSTAR [18] final TB prevalence survey carried out in 2010 in 16 communities in Zambia and 8 communities in the Western Cape, South Africa. The 2010 TB prevalence survey recruited between 4000 and 5000 individuals per community by visiting all households in randomly selected standard enumeration areas (SEAs). This study consisted of a subsequent cross-sectional face-to-face interview survey of TB prevalence survey enrolees that took place in February and March 2011 in Zambia, and in May and July 2011 in Western Cape. Four SEAs from each ZAMSTAR community were randomly selected proportional to size, and within each SEA ten individuals were randomly selected from four age and gender strata: men aged 18-29 years, men aged ≥30 years, women aged 18-29 years, and women aged ≥30 years (160 per community). Individuals were not eligible if they had not spent the previous night in the SEA or did not provide informed consent. If an individual was ineligible or was not found after two visits, another individual was randomly selected from the same stratum in that SEA. Recruitment was planned to continue until 10 individuals per SEA were selected within each stratum.
Interviews were carried out in participants’ homes by trained field staff using a standardized questionnaire that was piloted in Zambia, following a qualitative survey in Zambia that rapidly gathered data on places of significance to TB transmission, children’s space and popular knowledge of TB transmission[19]. Interviewees were asked to list buildings (other than their home) that they had entered the day before the interview (from midnight to midnight). Buildings were considered to be enclosed areas with walls and a roof, excluding transport. For each building they listed, they were asked:
[1] What type of building did you enter? (other home, shop, church, bar/disco/shebeen, school, clinic/hospital, hairdresser/barber, own work building, other).
[2] How much time did you spend in total inside this building? (less than 5 minutes, 5-10 minutes, 11-59 minutes, 1-4 hours, 5-8 hours, 9-13 hours, more than 14 hours).
[3] How many adults and youths (those older than 12) were present? (fewer than 5, 5-9, 10-20, more than 20).
[4] How many children (5-12) were present? (fewer than 5, 5-9, 10-20, more than 20) |
![[img]](https://datacompass.lshtm.ac.uk/style/images/fileicons/other.png)
