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Table 1 Characteristics of patient demographics, co-morbidities, mechanisms of traumatic injury, outcomes, life-saving interventions (LSI), vital signs, laboratory results and triage trauma scores

From: Development of a heart rate variability and complexity model in predicting the need for life-saving interventions amongst trauma patients

 

LSI (n = 49)

Non-LSI (n = 176)

P value

Patient demographics

 Age (median, IQR)

39, 27–53

44, 31–62

0.051

 Age> 56 (n, %)

9, 18.36%

62, 35.23%

0.025

 Male (n, %)

42, 85.71%

115, 65.34%

0.006

 Chinese (n, %)

28, 57.14%

105, 59.66%

0.751

 Ischemic heart disease (n, %)

0, 0.00%

9, 5.11%

0.106

 Diabetes mellitus (n, %)

3, 0.06%

21, 11.93%

0.244

 Hypertension (n, %)

7, 14.29%

36, 20.45%

0.331

 Hyperlipidemia (n, %)

3, 0.06%

26, 14.77%

0.110

 Congestive cardiac failure (n, %)

1, 0.02%

3, 0.02%

0.875

 Cancer (n, %)

0, 0.00%

13, 0.07%

0.052

 Respiratory disease (n, %)

2, 0.04%

10, 0.06%

0.659

 Renal disease (n, %)

0, 0.00%

6, 0.03%

0.190

Mechanisms of traumatic injury

 Fall (n, %)

7, 14.29%

87, 49.43%

< 0.001

 Road traffic accident (n, %)

19, 38.78%

46, 26.14%

0.084

 Burns (n, %)

9, 18.37%

15, 0.09%

0.048

 Others (n, %)

14, 28.57%

28, 15.91%

0.044

Outcomes

 Intensive care unit admission (n, %)

22, 44.90%

5, 2.84%

< 0.001

 Death (n, %)

10, 20.41%

1, 0.57%

< 0.001

 Overall stay (median, IQR)

21, 9–106

3, 2–15

< 0.001

LSI (n, %)

49, 21.78%

  

 Operating theatre within 24 h, for trauma (n, %)

35, 71.43%

  

 Endotracheal intubation (n, %)

10, 20.41%

  

 Blood transfusion (n, %)

16, 32.65%

  

Vital signs

 Heart rate, beats per minute (mean ± SD)

93.49 ± 21.28

85.42 ± 16.32

0.020

 Respiratory rate, breaths per minute (median, IQR)

18.00, 14–19

18.00, 18–18

0.396

 Temperature, degrees Celsius (median, IQR)

36.50, 31.3–36.7

36.70, 36.1–36.9

0.972

 Systolic blood pressure, mmHg (mean ± SD)

126.14 ± 29.59

138.45 ± 24.76

0.238

 Diastolic blood pressure, mmHg (mean ± SD)

75.41 ± 19.31

77.40 ± 14.84

0.106

 Oxygen saturation, % (median, IQR)

99, 98–100

100, 98–100

0.397

 Glasgow coma scale (median, IQR)

15, 3–15

15, 15–15

< 0.001

 Pain score, out of 10 (median, IQR)

6, 0–9

7, 0–10

0.798

Laboratory results

 Haemoglobin (mean ± SD)

13.97 ± 2.55 (n = 49)

13.48 ± 2.38 (n = 151)

0.852

 pH (median, IQR)

7.00, 7.00–7.31 (n = 17)

7.36, 7.25–7.41 (n = 22)

0.038

 Lactate (median, IQR)

2.7, 2.1–3.6 (n = 23)

2.2, 1.8–3.3 (n = 38)

0.015

Triage trauma scores

 T-RTS (median, IQR)

12, 8–12

12, 12–12

< 0.001

 MEWS (median, IQR)

1, 1–3

1, 1–2

< 0.001

 M-GAP (median, IQR)

25, 17–26

27, 22–29

0.002

 GAP (median, IQR)

22, 12–24

24, 19–24

0.011

  1. IQR interquartile range, SD standard deviation, T-RTS Triage Revised Trauma Score, MEWS Modified Early Warning System, M-GAP Mechanism of injury, Glasgow Coma Scale, Age and Arterial blood pressure, GAP Glasgow Coma Scale, Age and Systolic blood pressure