Table 4 Univariate and multivariate analyses of factors affecting survival to discharge

Age, (per year)

0.958

0.947–0.97

<.001

0.971

0.953–0.989

0.001

Sex, (Female/male)

0.61

0.43–0.867

0.006

0.789

0.478–1.302

0.354

Witnessed arrest (Yes/No)

1.695

1.171–2.453

0.005

1.434

0.849–2.422

0.178

Arrest location (Home/Others)

0.513

0.371–0.71

<.001

0.783

0.491–1.249

0.305

Bystander response (CPR performed/CPR not performed)

1.707

1.236–2.356

0.001

1.194

0.741–1.923

0.467

First monitored rhythm (Shockable/Non-shockable)

6.098

4.244–8.761

<.001

2.762

1.505–5.068

0.001

Hypertension (Present/Absent)

0.64

0.464–0.883

0.007

1.073

0.64–1.799

0.790

Diabetes (Present/Absent)

0.409

0.286–0.583

<.001

0.381

0.221–0.657

0.001

Dyslipidaemia (Present/Absent)

1.101

0.579–2.093

0.769

No flow time, (per minute)

0.984

0.964–1.005

0.142

Low flow time, (per minute)

0.939

0.927–0.95

<.001

0.969

0.953–0.986

<.001

Pre-hospital ROSC (Observed/Not observed)

10.845

7.075–16.624

<.001

2.161

1.011–4.619

0.047

Pre-hospital adrenaline (Used/Not used)

0.474

0.273–0.824

0.008

0.639

0.283–1.443

0.281

 Bag-valve mask

Reference

–

–

 Supraglottic airway

0.802

0.569–1.129

0.206

 Endotracheal intubation

0.703

0.413–1.199

0.196

 Alert

Reference

–

–

Reference

–

–

 Drowsy to stuporous

0.43

0.14–1.321

0.141

1.685

0.433–6.559

0.067

 Coma

0.062

0.025–0.158

<.001

0.451

0.146–1.397

0.005

 None

Reference

–

–

Reference

–

–

 CAG only

5.003

3.307–7.567

<.001

1.58

0.84–2.973

0.197

 CAG and PCI

2.832

1.764–4.548

<.001

0.923

0.438–1.945

0.385

 tPA

1.262

0.652–2.443

0.490

1.293

0.555–3.013

0.765

 TTM (Performed/Not performed)

1.34

0.962–1.865

0.083

 pH

89.557

34.575–231.976

<.001

1.572

0.375–6.59

0.536

 Lactate (per mmol/l)

0.868

0.835–0.903

<.001

0.958

0.907–1.011

0.115

 Glucose (per mg/dl)

0.998

0.997–0.999

0.002

1

0.998–1.002

0.985

 First systolic BP after ROSC, (per mmHg)

1.008

1.004–1.012

<.001

1.009

1–1.018

0.054

 First diastolic BP after ROSC, (per mmHg)

1.021

1.014–1.028

<.001

0.999

0.983–1.015

0.931

 First pulse rate after ROSC, (per beat/min)

1.003

0.997–1.008

0.340

 18.5 to 24.9

Reference

–

–

Reference

–

–

  < 18.5

0.531

0.318–0.889

0.030

0.854

0.425–1.719

0.889

 25.0 to 29.9

0.881

0.606–1.282

0.697

0.856

0.49–1.495

0.861

  > 30.0

1.004

0.495–2.035

0.474

0.621

0.211–1.823

0.496