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Table 3 Hazard ratios (95% confidence intervals) for mortality according to the duration of acute kidney injury

From: Duration of acute kidney injury and mortality in critically ill patients: a retrospective observational study

  Unadjusted HR Adjusted HR*
Duration groups In-hospital mortality Overall mortality In-hospital mortality Overall mortality
No AKI (n = 488) 1 (Reference) 1 (Reference) 1 (Reference) 1 (Reference)
1st tertile (n = 552) 2.07 (1.41–3.02) 1.77 (1.43–2.18) 3.22 (2.03–5.13) 1.99 (1.48–2.67)
2nd tertile (n = 497) 3.83 (2.69–5.46) 2.97 (2.43–3.63) 4.29 (2.83–6.51) 2.67 (2.04–3.50)
3rd tertile (n = 437) 4.43 (3.12–6.30) 3.85 (3.15–4.70) 3.64 (2.48–5.35) 2.85 (2.24–3.64)
RRT (n = 169) 8.97 (6.18–13.02) 5.73 (4.51–7.27) 5.57 (3.76–8.25) 3.83 (2.96–4.95)
  1. HR, Hazard ratio; AKI, Acute kidney injury; RRT, Renal replacement therapy.
  2. *Adjusted for age, sex, APACHE ІІ score, primary diagnosis, underlying CKD, history of malignancy, the need for mechanical ventilation, the use of vasoactive drugs, and AKI stages.