Table 2. Baseline characteristics of the study population.
| Parameters | All patients | Group P | Group NP | P value* |
|---|---|---|---|---|
| No. | 180 | 100 | 80 | |
| Men | 147 (81.7) | 84 (84.0) | 63 (78.8) | 0.367 |
| Age, yr | 51 (37–58) | 50.5 (37–58) | 52 (40–59) | 0.683 |
| RTS, points | 7.8408 (5.9672–7.8408) | 7.5500 (5.0304–7.8408) | 7.8408 (7.2186–7.8408) | < 0.001 |
| ISS, points | 20 (10–29) | 24.5 (16–35) | 14 (7–26) | < 0.001 |
| ISS > 15 | 118 (65.7) | 79 (79.0) | 39 (48.8) | < 0.001 |
| Transport time, min | 109 (60–213) | 170 (84–308) | 78 (60–120) | < 0.001 |
| ER to OR time, min | 136 (75–230) (n = 95) | 105 (60–183) (n = 59) | 185 (126–350) (n = 36) | < 0.001 |
The number of patients (proportions, %) or median values (interquartile range) are presented.
Group P, patients transported by physician-staffed helicopter emergency medical services; Group NP, patients transported by nonphysician-staffed helicopter emergency medical services; ER, emergency room; OR, operation room; IQR, interquartile range; RTS, revised trauma score; ISS, injury severity score.
*Mann-Whitney U test or χ2 analysis, as appropriate.