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Table 3 Hyperoxemia and ICU-free days

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

  Hyperoxemia Non-hyperoxemia Difference 95% CI P value
Unadjusted analyses
 ICU-free days until day 28, median (IQR) 17 (10–21) 23 (16–26) − 4 − 2 to − 7 < 0.001
  - Intubated at ED 17 (11–20) 15 (8–23) 0 − 3 to 4 0.832
  - Not intubated at ED 22 (10–28) 24 (21–27) − 2 − 9 to 2 0.356
IPWa
 ICU-free days until day 28, median (IQR) 16 (10–22) 19 (12–24) − 2 − 4 to 0 0.123
  - Intubated at ED 18 (9–20) 15 (8–23) 0 − 3 to 3 0.777
  - Not intubated at ED 16 (12–22) 23 (19–26) − 5 −3 to − 10 0.004
 Ventilator-free days until day 28, median (IQR) 19 (10–26) 22 (7–27) − 1 − 3 to 0 0.123
  - Intubated at ED 18 (0–20) 18 (4–25) 0 − 4 to 0 0.265
  - Not intubated at ED 25 (15–26) 28 (23–28) − 2 − 3 to 0 0.014
Survival rate 85.2% 82.7% OR = 1.21 0.62 to 2.35 0.590
  1. CI confidence interval, IQR interquartile range, ED emergency department, IPW inverse probability weighting
  2. aIPW was performed using propensity scores, and data were presented after excluding patients with propensity score of < 0.1 or > 0.9