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Table 3 Primary and secondary endpoints

From: Prone positioning in acute respiratory distress syndrome after abdominal surgery: a multicenter retrospective study

  Overall Prone Supine p
Primary endpointa, n (%) 41 (42) 14 (39) 27 (44) 0.65
Revision surgeryb, n (%) 17 (17) 3 (8) 14 (23) 0.10
All revision surgeryc 35 (36) 8 (22) 26 (42) 0.10
Duration of MV 10 [6–17] 9.5 [6–21] 11 [6–15] 0.72
ICU length of stay 13 [7–22] 13 [8–24] 13 [6–21] 0.77
ICU mortalityd, n (%) 43 (44) 15 (42) 28 (45) 0.43
  1. MV mechanical ventilation, ICU intensive care unit
  2. aAt least one surgical complication that could be induced or worsened by prone position
  3. bFor primary endpoint
  4. cSeveral patients had more than one revision surgery
  5. dFive patients died in the first 48 h (two in the prone group and three in the supine group)