Table 1 Baseline characteristics of trauma patients allocated to either a restrictive or a liberal oxygen strategy
From: Hypoxemia in trauma patients receiving two different oxygen strategies: a TRAUMOX2 substudy
Restrictive oxygen group (N = 30) | Liberal oxygen group (N = 30) | TRAUMOX2 trial cohort∗ (N = 972) | |
|---|---|---|---|
Age, median (IQR), years | 46 (32–57) [n = 30] | 56 (34–67) [n = 30] | 49 (30–65) [n = 972] |
Sex, No. (%), male | 19/30 (63%) | 26/30 (87%) | 698/972 (72%) |
Current smoker, No. (%) | 4/26 (15%) | 10/24 (42%) | 255/739 (35%) |
Lung disease comorbidity, No. (%) | 2/30 (7%) | 2/30 (7%) | 87/972 (9%) |
Cardiovascular comorbidity, No. (%) | 4/30 (13%) | 6/30 (20%) | 191/972 (20%) |
Body Mass Index, median (IQR), kg/m2 | 27 (22–28) [n = 26] | 24 (22–28) [n = 25] | 25 (22–28) [n = 797] |
Predominant type of injury, No. (%) | |||
Blunt | 28/30 (93%) | 25/30 (83%) | 849/972 (87%) |
Penetrating | 2/30 (7%) | 5/30 (17%) | 123/972 (13%) |
Injury Severity Score, median (IQR) | 17 (9–24) [n = 30] | 17 (9–26) [n = 30] | 14 (9–22) [n = 972] |
First measured vital signs, No. (%) | |||
Systolic blood pressure < 90 mmHg | 1/25 (4%) | 2/28 (7%) | 67/892 (8%) |
Heart rate > 110 beats/min | 3/26 (12%) | 3/27 (11%) | 135/894 (15%) |
Respiratory rate > 24 breaths/min | 3/20 (15%) | 9/25 (36%) | 122/700 (17%) |
SpO2 < 90% | 3/27 (11%) | 8/30 (27%) | 131/892 (15%) |
Type of supplemental oxygen†, No. (%) | |||
No supplemental oxygen | 18/30 (60%) | 4/30 (13%) | 396/972 (41%) |
Nasal cannula | 10/30 (33%) | 2/30 (7%) | 242/972 (25%) |
Non-rebreather mask | 1/30 (3%) | 20/30 (67%) | 375/972 (39%) |
Intubated (during intervention) | 14/30 (47%) | 13/30 (43%) | 447/972 (46%) |