Table 2 Univariate and multivariable Cox hazards analysis of the training cohort

Statistically significant factors

Age, year

  < 65

Ref

Ref

Ref

Ref

 65–75

1.636 (1.157–2.314)

0.005

1.295 (0.909–1.847)

0.153

  ≥ 75

2.807 (2.015–3.910)

< 0.001

1.866 (1.307–2.663)

0.001

LAD stenosis ≥ 50%

2.192 (1.445, 3.327)

< 0.001

1.909 (1.247–2.925)

0.003

RCA stenosis ≥ 50%

1.969 (1.444, 2.684)

< 0.001

1.854 (1.350–2.545)

 < 0.001

Lactate ≥ 2 mmol/L

1.604 (1.096, 2.347)

0.015

1.555 (1.051–2.299)

0.027

BNP, pg/mL

  < 500

Ref

Ref

Ref

Ref

 500–1000

1.467 (1.002, 2.150)

0.049

1.105 (0.744–1.642)

0.621

  ≥ 1000

3.506 (2.567, 4.789)

< 0.001

2.284 (1.620–3.219)

< 0.001

LVEF < 40%

2.138 (1.585, 2.885)

< 0.001

1.607 (1.167–2.211)

0.004

Men

0.508 (0.375, 0.689)

< 0.001

LCX stenosis ≥ 50%

1.394 (1.051, 1.848)

0.021

Hypertension

1.523 (1.137, 2.040)

0.005

Diabetes

1.310 (0.952, 1.803)

0.097

Atrial fibrillation

1.841 (1.223, 2.771)

0.003

Kidney disease

2.284 (1.367, 3.814)

0.002

EGFR < 60 mL/min/1.73 m²

2.149 (1.618, 2.855)

< 0.001

Creatinine > 186 μmol/L

2.402 (1.566,3.684)

< 0.001

Haemoglobin < 120 g/L

1.831 (1.370, 2.448)

< 0.001

Statistically non-significant factors

Peripheral artery stenosis

1.290 (0.928, 1.793)

0.129

Previous stroke

1.419 (0.924, 2.179)

0.109

Previous cardiac arrest

1.193 (0.611, 2.331)

0.605

Uric acid, μmol/L

1.310 (0.926, 1.854)

0.128