Table 1.
Baseline characteristics of the patients in the multiply imputed dataset (major variables)
| Variables | OCCPR (n = 1032) | CCCPR (n = 1650) | ASMD |
|---|---|---|---|
| Age, years old, median [IQR] | 45 [28, 63] | 32 [23, 49] | 0.45 |
| Gender, female, n (%) | 267 (25.9) | 311 (18.8) | 0.17 |
| Type of injury | |||
| Blunt | 741 (71.8) | 705 (42.7) | 0.61 |
| Penetrating | 291 (28.2) | 945 (57.3) | 0.61 |
| Total prehospital transport time, min, median [IQR] | 48 [32, 88] | 35 [25. 59] | 0.15 |
| Transfer from another hospital, yes, n (%) | 110 (10.7) | 117 (7.1) | 0.13 |
| Highest AIS score per body region, median [IQR] | |||
| Head | 3 [0, 5] | 0 [0, 1] | 0.79 |
| Face | 0 [0, 1] | 0 [0, 0] | 0.28 |
| Neck | 0 [0, 0] | 0 [0, 0] | 0.02 |
| Chest | 3 [0, 4] | 3 [3, 4] | 0.45 |
| Abdomen | 0 [0, 3] | 3 [0, 4] | 0.43 |
| Spine | 0 [0, 2] | 0 [0, 0] | 0.22 |
| Upper extremities | 0 [0, 2] | 0 [0, 1] | 0.02 |
| Pelvis and lower extremities | 0 [0, 3] | 0 [0, 2] | 0.17 |
| Skin/superficial | 0 [0, 0] | 0 [0, 0] | 0.00 |
| Injury Severity Score | 26 [19, 35] | 26 [20, 36] | 0.10 |
| Systolic blood pressure, mmHg, median [IQR] | 100 [72, 132] | 97 [69, 127] | 0.09 |
| Heart rate, bpm, median [IQR] | 103 [70, 129] | 110 [77, 133] | 0.12 |
| Respiratory rate, bpm, median [IQR] | 16 [0, 22] | 17 [8, 24] | 0.11 |
| Body temperature, °C, median [IQR] | 36.0 [35.1, 36.5] | 36.0 [35.2, 36.5] | 0.00 |
| Glasgow Coma Scale, median [IQR] | 3 [3, 9] | 3 [3, 13] | 0.22 |
| Time from ED arrival to OCCPR, hours, median [IQR] | 1 [0, 1] | – | – |
| Time from ED arrival to CCCPR, hours, median [IQR] | 0 [0, 1] | 0 [0, 1] | 0.25 |
Abbreviations: OCCPR open-chest cardiopulmonary resuscitation, OCCPR closed-chest cardiopulmonary resuscitation, ASMD absolute standardized mean difference, IQR interquartile range, AIS abbreviated injury scale, ED emergency department