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Table 4 Results of the multivariate analyses for each parameter

From: Validity and risk factor analysis for helicopter emergency medical services in Japan: a pilot study

Analysis of all emergency calls

Analysis of calls after the first assesment by an EMT

Emergency intervention

Emergency intervention

Variable keyword

OR

95%CI(L)

95%CI(H)

p-value

Variable keyword

OR 95%

95%CI(L) 95%

95%CI(H)

p-value

Age

1.105

1.002

1.028

0.024*

Age

1.106

1.001

1.031

0.04*

Male

1.528

0.994

2.351

0.054

Male

1.674

1.029

2.721

0.038*

Situation; under sports

2.32

1.278

4.211

0.006*

situation; under sports

3.387

1.535

7.472

0.003*

Situation; under work

1.356

0.56

3.281

0.5

situation; under work

1.14

0.427

3.309

0.794

Chest pain

0.646

0.377

1.017

0.112

chest pain

0.732

0.406

1.321

0.3

Stroke symptoms

1.131

0.63

2.029

0.68

Stroke symptoms

1.742

0.862

3.521

0.122

Dyspnea

1.071

0.545

2.102

0.843

Dyspnea

1.144

0.533

2.459

0.73

Shock

1.401

0.616

3.186

0.421

Shock

1.149

0.47

2.806

0.761

Gasping for air

3.159

1.083

9.128

0.035*

Gasping for air

8.015

1.009

63.7

0.049*

DOC

1.063

0.62

1.824

0.824

DOC

1.655

0.861

3.183

0.131

Convulsion

0.436

0.103

1.847

0.26

Convulsion

0.634

0.114

3.542

0.604

Emergency call from a healthcare provider

3.099

0.603

15.922

0.176

Emergency call from a healthcare provider

4.188

0.481

36.47

0.195

Emergency call from a family member

0.562

0.128

2.468

0.446

Emergency call from a family member

0.664

0.106

4.154

0.662

Needs hospital admission

Needs hospital admission

Variable keyword

OR

95%CI(L)

95%CI(H)

p-value

Variable keyword

OR

95%CI(L)

95%CI(H)

p-value

Age

1.025

1.012

1.039

<0.001*

Age

1.036

1.108

1.055

<0.001*

Male

1.502

0.961

2.347

0.074

Male

1.892

1.056

3.387

0.032*

Situation; under sports

1.642

0.864

3.121

0.13

situation; under sports

0.917

0.917

7.206

0.073

Situation; under work

1.242

0.491

3.139

0.467

situation; under work

0.877

0.279

2.756

0.923

Chest pain

0.661

0.372

1.173

0.157

Chest pain

0.855

0.416

1.754

0.668

Stroke symptoms

1.107

0.582

2.105

0.757

Stroke symptoms

3.209

1.167

8.822

0.024*

Dyspnea

0.923

0.455

1.872

0.823

Dyspnea

0.994

0.405

2.439

0.99

Shock

1.502

0.615

3.67

0.372

Shock

1.276

0.444

3.665

0.651

Gasping for air

2.16

0.675

6.906

0.194

Gasping for air

> 100

< 0.001

  

DOC

1.152

0.642

2.067

0.635

DOC

4.19

1.157

11.577

0.006

Convulsion

0.954

0.251

3.626

0.945

Convulsion

6.92

0.538

89.048

0.138

Emergency call from a healthcare provider

3.555

0.417

30.318

0.246

Emergency call from a healthcare provider

> 100

< 0.001

 

0.999

Emergency call from a family member

0.442

0.097

2.023

0.293

Emergency call from a family member

0.305

0.029

3.194

0.322

Validity of the suggested diagnoses

Validity of the suggested diagnoses

Variable keyword

OR

95%CI(L)

95%CI(H)

p-value

Variable keyword

OR

95%CI(L)

95%CI(H)

p-value

Age

1.004

0.992

1.016

506

Age

1

0.985

1.055

0.978

Male

1.134

0.745

1.728

0.558

Male

0.985

0.602

1.16

0.95

Situation; under sports

2.852

1.398

4.468

0.002*

Situation; under sports

4.548

1.842

11.232

0.001*

Situation; under work

1.51

0.623

3.661

0.361

Situation; under work

1.347

0.49

3.7

0.564

Chest pain

0.705

0.411

1.209

0.204

Chest pain

0.752

0.41

0.138

0.358

Stroke symptoms

0.786

0.44

1.406

0.417

Stroke symptoms

0.971

0.485

1.943

0.934

Dyspnea

1.099

0.555

2.178

0.787

Dyspnea

1.135

0.508

2.534

0

Shock

1.331

0.58

3.055

0.5

Shock

1.005

0.406

2.489

0.757

Gasping for air

1.607

0.627

4.119

0.323

Gasping for air

1.603

0.476

5.399

0.991

DOC

0.759

0.444

1.299

0.315

DOC

1.022

5.399

1.692

0.941

Convulsion

0.77

0.215

2.754

0.688

Convulsion

2.615

0.284

24.107

0.366

Emergency call from a healthcare provider

2.74

0.539

13.921

0.224

Emergency call from a healthcare provider

3.308

0.39

28.095

0.273

Emergency call from a family member

0.735

0.173

3.118

0.677

Emergency call from a family member

0.925

0.158

5.433

0.931

  1. Notes: *Signifies statistical significance. DOC disturbance of consciousness; OR odds ratio; CI confidence interval; EMT emergency medical technician