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Multivariate stratified analyses for the association of HCV infection and active TB disease. HCV infection was significantly associated with a higher risk of active TB disease in most strata, except for the stratum by age <50 y, HBV infection, alcoholism, and CKD because of the extremely small case numbers of active TB disease. CKD = chronic kidney disease, COPD = chronic obstructive pulmonary disease, HCV = hepatitis C virus, TB = tuberculosis.
