TABLE 2.
No Resources (n = 32,980) | Resources (n = 83,521) | Absolute Standardized Difference | |
---|---|---|---|
Age | 52 (31–72) | 52 (32–73) | 0.039 |
Sex (male) | 20,800 (63.1%) | 50,520 (60.5%) | 0.053 |
ISS | 10 (5–17) | 9 (5–16) | 0.131* |
GCS score ≤ 13 | 3,476 (21.5%) | 8,167 (19.6%) | 0.048 |
SBP <90 mm Hg | 689 (3.9%) | 1,583 (3.6%) | 0.019 |
RR <10 or >29 bpm | 1,592 (9.3%) | 3,240 (7.4%) | 0.07 |
Penetrating injury | 1,582 (4.8%) | 3,856 (4.6%) | 0.009 |
Flail chest | 341 (1.0%) | 697 (0.8%) | 0.021 |
Open skull fracture | 420 (1.3%) | 800 (1.0%) | 0.03 |
≥2 long bone fractures | 768 (2.3%) | 1,545 (1.8%) | 0.033 |
Pelvic fracture | 2,786 (8.4%) | 6,339 (7.6%) | 0.032 |
Crush injury | 148 (0.4%) | 304 (0.4%) | 0.013 |
Amputation | 92 (0.3%) | 167 (0.2%) | 0.016 |
Paralysis | 193 (0.6%) | 415 (0.5%) | 0.012 |
Distance (miles) | 40.8 (23.7, 63.1) | 27.6 (15.0, 41.3) | 0.473* |
Prehospital time (minutes) | 69 (55, 99) | 56 (44, 75) | 0.288* |
HEMS transport | 9,172 (36.9%) | 18,118 (28.6%) | 0.177* |
Undertriage | 3,107 (9.4%) | 6,878 (8.2%) | 0.042 |
Mortality | 1,840 (5.6%) | 4,071 (4.9%) | 0.032 |
Absolute values for the standardized difference > 0.1 represent significant imbalance between groups in the distributions of the variable indicated.
Continuous variables presented as median (IQR).
Categorical variables presented as n (%).