Table 3.
Baseline characteristics of the patients of the multiply imputed and propensity score-matched dataset (major matched variables)
| Variables | OCCPR (n = 531) | CCCPR (n = 531) | ASMD |
|---|---|---|---|
| Age, years old, median [IQR] | 39 [26, 56] | 40 [25, 56] | < 0.01 |
| Gender, female, n (%) | 127 (23.9) | 127 (23.9) | < 0.01 |
| Type of injury | |||
| Blunt | 339 (63.8) | 342 (64.4) | 0.01 |
| Penetrating | 192 (36.2) | 189 (35.6) | 0.01 |
| Total prehospital transport time, min, median [IQR] | 44 [30, 73] | 39 [28, 69] | 0.02 |
| Transfer from another hospital, yes, n (%) | 47 (8.9) | 47 (8.9) | < 0.01 |
| Highest AIS score per body region, median [IQR] | |||
| Head | 0 [0, 3] | 0 [0, 4] | 0.07 |
| Face | 0 [0, 1] | 0 [0, 1] | < 0.01 |
| Neck | 0 [0, 0] | 0 [0, 0] | 0.04 |
| Chest | 3 [3, 4] | 3 [3, 4] | 0.05 |
| Abdomen | 2 [0, 3] | 2 [0, 4] | 0.07 |
| Spine | 0 [0, 0] | 0 [0, 2] | 0.03 |
| Upper extremities | 0 [0, 2] | 0 [0, 2] | 0.03 |
| Pelvis and lower extremities | 0 [0, 3] | 0 [0, 3] | < 0.01 |
| Skin/superficial | 0 [0, 0] | 0 [0, 0] | 0.03 |
| Injury Severity Score | 26 [19, 35] | 27 [20, 38] | 0.08 |
| Systolic blood pressure, mmHg, median [IQR] | 92 [67, 127] | 96 [69, 130] | 0.05 |
| Heart rate, bpm, median [IQR] | 107 [71, 130] | 106 [75, 130] | 0.03 |
| Respiratory rate, bpm, median [IQR] | 16 [0, 22] | 16 [8, 24] | 0.09 |
| Body temperature, °C, median [IQR] | 36.0 [35.0, 36.5] | 36.0 [35.3, 36.5] | 0.04 |
| Glasgow Coma Scale, median [IQR] | 3 [3, 11] | 3 [3, 12] | 0.06 |
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, ACS American College of Surgeons