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Table 2 Short-term outcome among the early and delayed RRT groups, before and after inverse probability weighting of treatment

From: Timing of renal replacement therapy initiation by AKIN classification system

  Before weighting After IPTW weighting
  ED group
( n = 64)
LD group
( n = 86)
P -value ED group LD group Average treatment effect
(95% CI)
P -value
Duration of mechanical ventilation, days 12.5 ± 9.8 18.0 ± 13.7 0.049 12.8 ± 7.8 18.9 ± 9.4 -6.02 (-11.50 to -0.54) 0.031
Length of ICU stay, days 18.7 ± 12.5 24.7 ± 17.3 0.093 19.4 ± 11.5 25.4 ± 10.9 -5.97 (-12.91 to 0.976) 0.092
Time on RRT, days 6.9 ± 4.6 8.9 ± 4.6 0.178 6.7 ± 4.9 9.7 ± 6.1 -2.95 (-5.77 to -0.125) 0.041
In-hospital mortality, n (%) 33 (51.5) 67 (77.9) 0.001 51.2 81.7 -30.5 (-14.4 to -45.2) 0.002
  1. Results are presented as mean (± SD) unless stated otherwise. IPTW, inverse probability of treatment weighting; RRT, renal replacement therapy; ED, early dialysis; LD, late dialysis.