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Table 3 Primary and secondary outcomes after PSM

From: Effects of inhaled nitric oxide for postoperative hypoxemia in acute type A aortic dissection: a retrospective observational study

OutcomeControl (N = 94)iNO treatment (N = 40)p-value
Primary outcome
 Mechanical ventilation time (hours)69.0(47.8, 110.3)39.0(31.2, 47.8)< 0.001
 ICU stay (hours)179.5(114.0, 258.0)122.0(80.8, 155.0)< 0.001
Secondary outcome
 Inpatient deaths N (%)7 (7.4)1 (2.5)0.479
 In-hospital stay (days)20.5(15.8, 28.5)22.8(19.1, 27.5)0.131
 Postoperative drainage (24 h)470(325, 750)495(260, 667)0.216
 Peak CRP (mg/L)7.1(2.4, 85.7)8.0(2.6, 37.9)0.676
Complication.
 Cardiac arrest2 (2.1)0 (0.0)0.880
 Re-intubation7 (7.4)2 (5.0)0.888
 Pneumonia23 (24.5)5 (12.5)0.110
 Hepatic insufficiency20 (21.3)4 (10.0)0.119
 AKI55 (58.5)19 (47.5)0.241
 CRRT7 (7.4)2 (5.0)0.605
 Paraplegia1 (1.1)0 (0.0)0.513
 Sepsis6 (6.4)4 (10.0)0.466
 Re-exploration for bleeding2 (2.1)2(5.0)0.734
 thrombocytopenia28 (29.8)13 (32.5)0.755
  1. PSM Propensity score-matching, iNO Inhaled nitric oxide, ICU Intensive care unit, CRP C-reactive protein, AKI Acute kidney injury, CRRT Continuous renal replacement therapy
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