Figure 2
Overall survival curves of critically ill patients according to the duration of acute kidney injury. The overall survival rates of the five groups were significantly different (P < 0.001 by the log-rank test). Duration of acute kidney injury: 1st tertile, 1–2 days; 2nd tertile, 3–5 days; 3rd tertile, ≥ 6 days. RRT, patients who underwent renal replacement therapy.