Table 2 Cox proportional hazards regression model for the time-to-discharge in specialised adult burn services in England and Wales

Available

0.982

0.003

0.001

0.976

0.988

Age

0.986

0.000

0.001

0.986

0.987

TBSA (%)

0.954

0.001

0.001

0.952

0.957

Existing disorders

0

1

0.852

0.018

0.001

0.817

0.888

2

0.721

0.021

0.001

0.681

0.763

3

0.684

0.028

0.001

0.632

0.741

4

0.609

0.029

0.001

0.555

0.669

Injury type

Flame

Flash

1.211

0.034

0.001

1.146

1.279

Contact

1.084

0.028

0.002

1.030

1.142

Scald

1.039

0.025

0.116

0.991

1.089

Chemical

1.245

0.040

0.000

1.168

1.327

Other

1.108

0.039

0.003

1.034

1.186

Unknown

1.098

0.094

0.277

0.928

1.299

Inhalation injury

Absent

Present

0.778

0.050

0.001

0.686

0.882

Activity

Employment

Transport

0.776

0.058

0.001

0.671

0.897

Housework

1.155

0.055

0.002

1.053

1.267

Washing/Bathing

0.623

0.030

0.001

0.566

0.685

Food preparation

0.968

0.028

0.259

0.915

1.024

Sleep/Rest

0.847

0.034

0.001

0.784

0.916

Child play/exploration

1.236

0.141

0.063

0.989

1.546

Household DIY

1.152

0.043

0.001

1.071

1.240

Vehicle DIY

1.106

0.080

0.165

0.959

1.275

Hobby

0.905

0.078

0.249

0.764

1.072

Sport

1.118

0.226

0.581

0.752

1.661

Amusement

0.975

0.053

0.646

0.876

1.085

Socialising

0.925

0.041

0.078

0.849

1.009

Argument/Fight

0.883

0.058

0.056

0.777

1.003

No specific activity

0.848

0.031

0.001

0.790

0.911

Other

0.882

0.026

0.001

0.834

0.934

Unknown

0.932

0.034

0.050

0.868

1.000

Total graft number

0

1

0.593

0.012

0.001

0.570

0.618

2

0.330

0.015

0.001

0.301

0.362

3

0.303

0.016

0.001

0.273

0.335

Bed severity allocation

1

2

0.757

0.019

0.001

0.721

0.795

>3

0.625

0.021

0.001

0.584

0.668