Dataset codebook for a 30-year population-based study examining the contribution of remote M.tuberculosis infection to tuberculosis

After the second survey in the 1980s there have been no further total population surveys, but follow-up information is available from other studies conducted in the district, including small population-based surveys and demographic surveillance in different areas of the district. All studies use common identifiers for individuals, so the date individuals were seen, or the date they were reported to have left the district or died, as recorded in other studies, can be used to estimate the date individuals were last known to be alive and in the district.

In 2009-2013, individuals recorded as having TST induration sizes of greater than 20mm in the 1980’s surveys were identified. Those who were not already known from continuing studies in the area to have developed TB or to have died or left the district were sought. Interviewers asked those found living in Karonga district about prior treatment for TB and current cough.

For those who had left the district or died, a suitable informant was asked about prior treatment for TB as well as dates of departure or death.