Table 1 Patient characteristics and confounding factors
Passive warming (n = 22) | Active warming (n = 26) | |
|---|---|---|
Patient characteristics | ||
Gender (male/female) | 9/13 | 10/16 |
Age (years) | 45 (34 - 55) | 43 (36 - 50) |
Body Mass Index | 25.0 (22.8 - 27.3) | 25.4 (23.6 - 27.3) |
Environment | ||
Outdoor temperature (°C) | -6 (-9 - -2) | -3 (-6 - -1) |
Outdoor wind speed (m/s) | 2 (1 - 3) | 2 (1 - 4) |
Interior unit temperature (°C) | 20 (19 - 21) | 20 (19 - 21) |
Cold exposure (min) | 64 (41 - 88) | 81 (61 - 101) |
Time to 2nd measurement (min) | 24 (21 - 28) | 27 (24 - 29) |
Total transportation (min) | 33 (25 - 41) | 37 (25 - 49) |
Clothing (light/medium/heavy) | 5/6/9 | 4/9/13 |
Clothing (dry/moist/wet) | 13/2/4 | 21/3/1 |
Treatment during transport | ||
No. of blankets | 2.7 (2.2 - 3.2) | 2.3 (1.9 - 2.7) |
Undress (none/partial/total) | 12/8/2 | 14/10/1 |
Whole body fixation (yes/no) | 8/13 | 8/17 |
Intravenous fluids (ml) | 91 (31 - 151) | 50 (0 - 107) |
Intravenous opioids (yes/no) | 10/12 | 14/12 |
Intravenous sedatives (yes/no) | 2/20 | 5/21 |