Shum HP, et al. - Propensity score matching analysis was employed to probe the impact of renal replacement therapy (RRT) on 90-day mortality in critically ill patients suffering from KDIGO stage 3 acute kidney injury (AKI) with or without life-threatening complications. A possible link of RRT with lower 90-day mortality was noticed in these patients. Moreover, results revealed that the benefit of RRT on renal recovery was less prominent. Study interpretation could be complicated by medical futility and practice variations.