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Table 3 Baseline characteristics of the patients of the multiply imputed and propensity score-matched dataset (major matched variables)

From: Open-chest versus closed-chest cardiopulmonary resuscitation in trauma patients with signs of life upon hospital arrival: a retrospective multicenter study

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

  1. 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