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Table 4 Risk of mortality according to center of treatment

From: Renal replacement therapy is an independent risk factor for mortality in critically ill patients with acute kidney injury

Center influence n % RRT % Mortality RR (95% CI)*
center 1 158 45.6 43.0 ref
center 2 412 47.8 44.4 1.2 (0.8 to 1.8)
center 3 387 53.7 55.8 1.4 (0.9 to 2.1)
center 4 223 54.7 54.7 1.9 (1.2 to 2.9)
  1. * Overall P = .03
  2. Binary logistic regression analysis with centers ranked according to their frequency of RRT treatment offered, with the center showing the lowest frequency of RRT taken as reference category. Center risk was controlled for individual treatment offered (conservative versus RRT) and individual disease severity (SHARF score).
  3. RR (95% CI), relative risk with 95% confidence interval; RRT, renal replacement therapy.