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. 2014 Mar 3;14:30. doi: 10.1186/1471-2261-14-30

Table 4.

Subgroup analysis

  Cathed (Group A) 63 patients Non-cathed (Group B) 15 patients p-value Good outcome (Group C) 53 patients Poor outcome (Group D) 25 patients p-value
Risk factors
  
  
  
  
  
  
Age, mean(±SD)
 61.1(14.1)
 64.9(19.5)
 0.20
 59.4(14.9)
 67.1(14.7)
 0.01
Males, no. (%)
 52(82.5)
 11(73.3)
 0.21
 45(84.9)
 18(72.0)
 0.09
Diabetes, no. (%) [1]*
 11(17.5)
 2(14.3)
 0.39
 3(5.7)
 10(41.7)
 <0.01
Hypertension, no. (%) [1]
 32(50.8)
 7(50.0)
 0.48
 27(50.9)
 12(50.0)
 0.46
Hyperlipidaemia, no. (%) [11]
 25(46.3)
 3(23.1)
 0.07
 19(41.3)
 9(42.9)
 0.45
History of IHD, no. (%) [2]
 17(27.4)
 3(21.4)
 0.33
 15(28.8)
 5(20.8)
 0.23
Serum creatinine μmol/L, median(IQR)
 102(86–115)
 125(113–161)
 <0.01
 100(84–114)
 119(107–142)
 <0.01
GFR ml/min, median(IQR)
 63(52–78)
 46(37–54)
 <0.01
 66(55–81)
 50(42–60)
 <0.01
History of smoking, no. (%) [19]
 41(80.4)
 6(75.0)
 0.37
 34(79.1)
 13(81.3)
 0.42
Peri cardiac arrest factors
  
  
  
  
  
  
Time, min to first hospital, median(IQR) [16]
 52(40–61)
 70(51–80)
 <0.01
 50(40–60)
 63(50–73)
 0.02
Time, hrs to TPCH, median(IQR)
 3.9(1.0 -9.3)
 4.0(1.9–6.9)
 0.14
 5.75(1.05–11.8)
 1.25(1–4)
 <0.01
History of chest pain, no. (%) [3]
 21(33.9)
 4(30.8)
 0.42
 16(31.4)
 9(37.5)
 0.30
Time to ROSC in min, median(IQR) [11]
 15(10–25)
 22.5(15–29)
 0.36
 13.5(10–22.2)
 20(15–35)
 0.01
Treated at a peripheral hospital, no. (%)
 35(55.6)
 11(73.3)
 0.12
 35(66.0)
 11(44.0)
 0.03
ECG factors
  
  
  
  
  
  
Initial rhythm VF/VT, no. (%)
 56(88.9)
 9(60.0)
 <0.01
 47(88.7)
 18(72.0)
 0.03
ST elevation, no. (%)
 30(47.6)
 2(13.3)
 <0.01
 21(39.6)
 11(44.0)
 0.36
QTc in milliseconds, mean(±SD) [2]
 453(46)
 464(51)
 0.23
 454(48.4)
 457(43.4)
 0.42
Assessments and tests
  
  
  
  
  
  
GCS by paramedics, mean(±SD) [2]
 5.4(4.7)
 3.0(0)
 0.03
 5.84(5.06)
 3.12(0.6)
 <0.01
CCF in ED, no. (%)
 9(14.3)
 2(13.3)
 0.46
 5(9.4)
 6(24.0)
 0.04
First measured LVEF, mean(±SD) [6]
 37.7(17.2)
 36.7(21.6)
 0.43
 39.2(18.2)
 33.5(16.8)
 0.11
Initial serum K mmol/L, mean(±SD)
 3.9(0.7)
 4.2(0.6)
 0.06
 3.9(0.7)
 4.0(0.7)
 0.20
Initial serum Mg mmol/l, mean(±SD) [5]
 1.0(0.3)
 1.0(0.5)
 0.49
 1.0(0.3)
 1.1(0.6)
 0.06
Peak CK in IU/L, median(IQR) [9]
 1440(524–3562)
 1810(1070–4050)
 0.15
 1440(544–3442)
 1810(613–3870)
 0.37
Peak Troponin I in μmol/L, median(IQR) [5]
 20(4–71)
 9(1–35)
 0.20
 15(5–56)
 32(1–75)
 0.42
Treatments
  
  
  
  
  
  
Use of inotropes, no. (%)
 27(42.9)
 8(52.3)
 0.24
 20(37.7)
 15(60.0)
 0.03
Heparin/Enoxaparin, no. (%) [1]
 59(93.7)
 14(100)
 0.34
 51(96.2)
 22(91.7)
 0.21
Aspirin, no. (%) [1]
 62(98.4)
 11(78.6)
 <0.01
 52(98.1)
 21(87.5)
 0.03
Clopidogrel, no. (%) [1]
 50(79.4)
 3(21.4)
 <0.01
 37(69.8)
 16(66.7)
 0.39
Balloon pump, no. (%)
 20(31.7)
 2(13.3)
 0.08
 15(28.3)
 7(28.0)
 0.49
ICU stay in days, median(IQR)
 4(2–6)
 4(2–5.5)
 0.36
 4(2–6)
 4(2–4)
 0.15
Coronary angiogram at any time, no. (%)
 N/A
 N/A
 N/A
 47(88.7)
 16(64.0)
 <0.01
Initially presenting to TPCH
  
  
  
 18 patients
 14 patients
  
Emergent coronary angiogram, no. (%)
  
  
  
 11(61.1)
 11(78.6)
 0.15
Coronary angiogram at any time, no. (%)
  
  
  
 16(88.9)
 12(85.7)
 0.40
Outcomes
  
  
  
  
  
  
OOHCA caused by AMI, no. (%)
 45(71.4)
 6(40.0)
 0.01
  
  
  
Survived to discharge, no. (%)
 47(74.6)
 6(40.0)
 <0.01
  
  
  
Neurological deficit, no. (%)
 7(11.1)
 0(0.0)
 0.09
  
  
  
Neurological deficit in survivors, no. (%) 7/47(14.9) 0/6(0.0) 0.16      

*[n] Number of patients for whom information was missing is represented within square brackets.

Group A = patients who had coronary angiogram (“cathed patients”).

Group B = patients who did not have coronary angiography (“non-cathed patients”).

Group C = patients who survived to discharge from hospital.

Group D = patients who died during the hospital admission.