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Table 1 Baseline characteristics

From: The influence of timing of coronary angiography on acute kidney injury in out-of-hospital cardiac arrest patients: a retrospective cohort study

Characteristics

All patients (N = 2375)

Early CAG (N = 1148)

Deferred/no CAG (N = 1227)

P value

Patient characteristics

 Male sex

1652 (69.6)

791 (47.9)

861 (52.1)

0.50

 Age in years

63.3 ± 13.8

62.7 ± 12.5

64.0 ± 14.9

0.02

 Hypertension

839/2041 (41.1)

411/966 (42.5)

428/1075 (39.8)

0.21

 Diabetes mellitus

379/2219 (17.1)

180/1109 (16.2)

199/1110 (17.9)

0.29

 Hypercholesterolemia

288/1211 (23.8)

128/530 (24.2)

160/681 (23.5)

0.88

 Previous cardiac arrest

21/1003 (2.1)

9/577 (1.6)

12/426 (2.8)

0.17

 Previous myocardial infarction

495/2189 (22.6)

231/1100 (21.0)

264/1089 (24.2)

0.07

 Previous CVA or TIA

43/690 (6.2)

24/357 (6.7)

19/333 (5.7)

0.64

 Chronic kidney disease

69/1141 (6.0)

20/586 (3.4)

49/555 (8.8)

< 0.001

 Previous renal replacement therapy

15/1009 (1.5)

7/579 (1.2)

8/430 (1.9)

0.40

Pre-hospital characteristics

 Arrest witnessed

981/1227 (80.0)

495/608 (81.4)

486/619 (78.5)

0.20

 First rhythm

< 0.001

  VF/VT

1009/1193 (84.6)

572/614 (93.2)

437/579 (75.5)

 

  PEA

57/1193 (4.8)

12/614 (2.0)

45/579 (7.8)

 

  Asystole

127/1193 (10.6)

30/614 (4.9)

97/579 (16.8)

 

 Time from arrest to BLS in minutes

3 [1–5]

3 [1–5]

3 [1–5]

0.40

 Time from arrest to ROSC in minutes

15 [10–23]

15 [10–23]

15 [10–23]

0.69

Characteristics on hospital arrival

 Glasgow Coma Scale < 8

1374/1533 (89.6)

639/735 (86.9)

735/798 (92.1)

0.001

 Signs of STEMI on ECG

543/1965 (27.6)

410/969 (42.3)

133/996 (13.4)

< 0.001

 CT scan performed

320/751 (57.4)

205/378 (54.2)

115/373 (30.8)

< 0.001

Laboratory values upon admission

 pH

7.2 [7.1–7.3]

7.2 [7.1–7.3]

7.2 [7.1–7.3]

0.05

 Lactate, mmol/L

5.9 [3.5–9.1]

5.5 [3.5–8.8]

6.2 [3.7–9.4]

0.01

 Hemoglobin, mmol/L

8.4 ± 1.3

8.5 ± 1.2

8.3 ± 1.3

0.001

 Hematocrit

0.40 ± 0.06

0.41 ± 0.1

0.39 ± 0.1

0.001

 Leukocytes, ·109/L

12.5 [9.8–16.7]

12.6 [10.0–17.0]

12.2 [9.4–16.1]

0.07

 CRP, mg/L

5 [3–17]

4 [3–16]

5 [3–19]

0.15

 Creatinine, µmol/L

98 [82–117]

96 [81–114]

100 [82–120]

0.001

 Creatinine > 130 µmol/L

366/2342 (15.6)

148/1134 (12.9)

218/1208 (17.8)

0.001

  1. All data are expressed in proportions of the population with known data and percentages (%). Plus–minus (±) values are classified as mean and standard deviation (SD). Brackets are classified as median and interquartile ranges (IQR)
  2. CAG coronary angiography, CVA cerebrovascular accident, TIA transient ischemic attack, VF ventricular fibrillation, VT ventricular tachycardia, PEA pulseless electrical activity, BLS basic life support, ROSC return of spontaneous circulation, STEMI ST-segment elevation myocardial infarction, CT computed tomography, CRP C-reactive protein