Fig 1.
* Data from the daily attendance register. Includes repeat attendances during this time period. §Screen out questions were asked in stages; if screened out at a stage no screening was conducted for subsequent stages. Within a stage more than one screen-out reason may apply. yrs years; IPT isoniazid preventive therapy; BMI body mass index, QFT-plus QuantiFERON-TB Gold-Plus, TST tuberculin skin test. Ϯ Lost in queue–miners who prescreened for the HETU study while waiting in queue for annual medical examination, but did not make it to the research site for further study related procedures.
Table 1.
Baseline demographic characteristics.
Fig 2.
Distribution of TST responses (n = 235).
TST = tuberculin skin test.
Table 2.
Factors associated with being TB uninfected as defined by being QFT-Plus negative, among miners attending for annual medical examination: 2(a) overall (n = 307); and 2(b) restricted to participants of Black/African ethnicity (n = 281).
Table 3.
Factors associated with being TB uninfected defined as being QuantiFERON-TB Gold-Plus negative and tuberculin skin test zero mm response† among miners attending for annual medical examination (n = 136) and restricted to Black/African miners (n = 123).