Figure 1.
Example of a IsoScreen and SmokeScreen negative test result.
Original urine colour (no colour change) = negative test result. Dark blue-purple IsoScreen test = positive test result. Orange-pink SmokeScreen test = positive test result. Any other colour change = indeterminate test result.
Figure 2.
Example of a IsoScreenpositive test result.
Original urine colour (no colour change) = negative test result. Dark blue-purple IsoScreen test = positive test result. Orange-pink SmokeScreen test = positive test result. Any other colour change = indeterminate test result.
Figure 3.
Example of a SmokeScreenpositivetest result.
Original urine colour (no colour change) = negative test result. Dark blue-purple IsoScreen test = positive test result. Orange-pink SmokeScreen test = positive test result. Any other colour change = indeterminate test result.
Figure 4.
Example of an indeterminate IsoScreen result.
Original urine colour (no colour change) = negative test result. Dark blue-purple IsoScreen test = positive test result. Orange-pink SmokeScreen test = positive test result. Orange IsoScreen test (not dark blue) = indeterminate test result.
Figure 5.
Example of an indeterminate SmokeScreen result.
Original urine colour (no colour change) = negative test result. Dark blue-purple IsoScreen test = positive test result. Orange-pink SmokeScreen test = positive test result. Dark blue SmokeScreen test (not orange-pink) = indeterminate test result.
Table 1.
INH Intake Reference Standard scoring system.
Table 2.
Smoking Status Reference Standard scoring system.
Figure 6.
Flow chart of the study selection process, smoking status and isoniazid intake based on medical charts and questionnaire responses.
Table 3.
Characteristics of participants obtained from medical records.
Table 4.
Summary of validity and reliability measures for IsoScreen.
Table 5.
Summary of validity and reliability measures of SmokeScreen.
Table 6.
Covariates associated with false-positive test results for SmokeScreen.
Table 7.
Covariates associated with false-negative test results for SmokeScreen.