Predictive factors for repetition of the tuberculin test after a nonreactive test in patients with HIV/AIDS.

Objective: The outcome of interest was repetition of the tuberculin skin test (TST) and the objectives were to estimate the rate of TST repetition, the probability of no TST repetition after 1 year, and the probability of no TST repetition at the end of the follow-up period in patients whose initial test was nonreactive. The study also set out to analyze factors associated with the time until TST repetition at two HIV/AIDS referral services that carry out the TST on a routine basis in Recife, Pernambuco, Brazil.

Methods: A cohort of HIV-positive patients who initially tested nonreactive on the TST were followed from November 2007 to February 2010.