Cigarette-Smoking Intensity and Interferon-Gamma  Release Assay Conversion among Persons Who Inject Drugs:  A Cohort Study

<table>Median IFN-<i>γ</i> and interquartile range at 18 months by quartiles of number of cigarettes smoked. IFN-<i>γ</i> &gt; 10 IU/mL were set to 10 IU/mL due to imprecision at high concentration levels. The dotted line represents the 0.70 IU/mL cutoff which was used to define QFT conversion. IFN-<i>γ</i>:  interferon-gamma. QFT:  QuantiFERON-TB Gold In-Tube.</table>

Pulmonary Medicine

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Figure 1

Figure 1: Cigarette-Smoking Intensity and Interferon-Gamma  Release Assay Conversion among Persons Who Inject Drugs:  A Cohort Study 