In the present study, we observed a high incidence of acute renal failure. In univariate analysis, we found that acute renal failure was associated with death. Acute renal failure is a common condition that affects many ICU patients and is a well-recognized risk factor for mortality [18, 19] . However, the results reported across studies in TB patients with acute renal failure are inconsistent. Although acute renal failure was identified as an independent predictor of death in some studies [4, 6, 20] , others [3, 12] did not find a significant impact of such complication on the mortality of critically ill TB patients.