[Factors associated with underreporting of cases of multidrug-resistant tuberculosis in the state of Rio de Janeiro, Brazil: probabilistic database linkage].

This study estimated the proportion of underreporting of multidrug-resistant tuberculosis (MDR-TB) and associated factors in the State of Rio de Janeiro, Brazil, as well as the proportion of deaths in this group. A retrospective cohort study was conducted using probabilistic database linkage. Cases with the results of the drug sensitivity test (DST) with MDR-TB pattern recorded in the Laboratory Environment Management System (GAL) from 2010 to 2017 were linked to cases reported to the Special TB Treatments System (SITETB).