Skip to main content

Table 1 Characteristics of patients with and without hyperoxemia

From: Hyperoxemia during resuscitation of trauma patients and increased intensive care unit length of stay: inverse probability of treatment weighting analysis

Case Unadjusted After IPWa
Hyperoxemia Non-hyperoxemia P value Hyperoxemia Non-hyperoxemia P value
58 186
Age, years, median (IQR) 49 (35–67) 60 (46–75) 0.022 50 (31–65) 53 (37–69) 0.175
Sex, male, n (%) 34 (58.6%) 126 (67.7%) 0.202 83 (64.8%) 85 (65.9%) 0.860
Injury mechanism, blunt, n (%) 56 (98.2%) 180 (97.3%) 1.000 123 (97.6%) 125 (97.7%) 1.000
Comorbidities (Charlson index), median (IQR) 0 (0–0) 0 (0–0) 0.281 0 (0–0) 0 (0–0) 0.007
Vital signs on arrival, median (IQR)
 GCS 6 (3–13) 14 (11–15) < 0.001 8 (5–14) 10 (6–14) 0.557
 RR 21 (18–28) 21 (18–26) 0.687 20 (16–26) 20 (15–28) 0.696
 HR 96 (77–120) 90 (73–102) 0.083 96 (80–120) 90 (73–110) 0.153
 BP systolic, mmHg 124 (90–147) 129 (103–154) 0.353 133 (103-151) 123 (83–158) 0.220
Injury severity, median (IQR)
 AIS—head 4 (0–5) 2 (0–4) < 0.001 4 (0–5) 4 (0–5) 0.663
 AIS—chest 3 (0–4) 3 (0–4) 0.039 3 (0–4) 3 (0–4) 0.136
 ISS 29 (25–38) 26 (19–34) 0.001 29 (25–38) 29 (25–38) 0.352
 SOFA score 10 (8–11) 8 (6–10) 0.001 9 (7–11) 8 (7–11) 0.703
 Cardiac arrest after arrival, n (%) 1 (1.7%) 2 (1.1%) 0.559 2 (1.6%) 4 (3.1%) 0.684
Treatment
 Tube thoracotomy, n (%) 13 (22.4%) 44 (23.7%) 0.845 32 (25.0%) 40 (31.0%) 0.284
 Intubation at ED, n (%) 47 (81.0%) 58 (31.2%) < 0.001 90 (70.3%) 96 (74.4%) 0.462
 Transfusionb, U, median (IQR)
  RBC 0 (0–4) 0 (0–2) 0.017 0 (0–4) 0 (0–6) 0.230
  FFP 0 (0–6) 0 (0–4) 0.024 0 (0–4) 0 (0–6) 0.218
  Platelet 0 (0–0) 0 (0–0) 0.276 0 (0–0) 0 (0–0) 0.178
Hemostatic procedure, n (%)
 Craniotomy 19 (32.8%) 19 (10.5%) < 0.001 37 (28.9%) 29 (23.2%) 0.301
 Thoracotomy 2 (3.4%) 2 (1.1%) 0.248 4 (3.1%) 1 (0.8%) 0.181
 Laparotomy 6 (10.3%) 13 (7.2%) 0.438 11 (8.7%) 10 (8.0%) 0.849
 Angiography 21 (36.2%) 37 (20.4%) 0.015 34 (26.6%) 32 (25.4%) 0.832
  1. IPW inverse probability weighting, GCS Glasgow Coma Scale, RR respiratory rate, HR heart rate, BP blood pressure, AIS Abbreviated Injury Scale, ISS Injury Severity Score, SOFA sequential organ failure assessment, ED emergency department, RBC red blood cell, FFP flesh frozen plasma
  2. aIPW was performed using propensity scores, and data were presented after excluding patients with propensity score of < 0.1 or > 0.9 bAmount of transfusion was calculated until 3 h after hospital arrival