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Annals of Intensive Care

Table 3 Association between covariates and 30-day mortality

From: Intensive care unit to unit capacity transfers are associated with increased mortality: an observational cohort study on patient transfers in the Swedish Intensive Care Register

 

Single explanatory variable

n = 1812

Multivariable, all variables below

n = 1812

Multivariable, including SOFA-score

n = 1812

 

Odds ratio

95% CI

p-value

Odds ratio

95% CI

p-value

Odds ratio

95% CI

p-value

Type of transfer

         

 Repatriation

Reference

  

Reference

  

Reference

  

 Clinical transfer

1.37

1.02–1.84

.035

1.77

1.27–2.48

.001

1.52

1.01–2.12

.014

 Capacity transfer

2.21

1.66–2.97

< .001

1.71

1.22–2.39

.002

1.62

1.16–2.26

.005

Variables adjusted for

         

 Age (per year)

1.04

1.04–1.05

< .001

1.04

1.03–1.05

 < .001

1.04

1.03–1.05

< .001

Gender

         

 Female

Reference

  

Reference

  

Reference

  

 Male

1.31

1.03–1.67

.027

1.19

0.92–1.55

.190

1.19

0.91–1.56

.200

SAPS3 score

         

 Box 1 (per point)a

1.06

1.04–1.09

< .001

1.05

1.02–1.07

.001

1.04

1.01–1.07

.006

 Box 2 (per point)

1.04

1.02–1.06

< .001

1.04

1.02–1.07

.002

1.03

1.00–1.06

.032

 Box 3 (per point)

1.05

1.04–1.06

< .001

1.04

1.03–1.06

 < .001

1.03

1.02–1.04

< .001

Time and day of discharge

         

 Daytime

Reference

  

Reference

  

Reference

  

 Night-time

1.40

1.00–1.96

.050

1.19

0.82–1.73

.361

1.13

0.78–1.65

.515

 Weekday

Reference

  

Reference

  

Reference

  

 Weekend

0.98

0.74–1.31

.913

0.93

0.68–1.26

.632

0.94

0.68–1.28

.682

 ICU length of stay (per hour)

1.00

1.00–1.00

.519

1.00

1.00–1.00

.992

1.00

1.00–1.00

.469

Principal disease groupb

         

 Central nervous system injury

Reference

  

Reference

  

Reference

  

 COPDc

0.76

0.22–2.70

.178

0.68

0.18–2.52

.566

0.65

0.17–2.47

.527

 Cardiac arrest

2.41

1.44–4.04

< .001

1.08

0.57–2.03

.817

0.97

0.51–1.83

.923

 Acute lung injury

1.27

0.89–1.82

< .001

0.79

0.52–1.21

.281

0.71

0.46–1.09

.116

 Sepsis

1.80

1.16–1.55

.017

0.92

0.56–1.50

.735

0.71

0.43–1.17

.174

 Multi-trauma

0.41

0.24–2.77

< .001

0.59

0.28–1.24

.167

0.59

0.28–1.23

.160

 Other diagnoses

0.79

0.21–1.12

.186

0.71

0.48–1.05

.087

0.67

0.45–1.00

.050

SOFA-score on discharge

         

 Total score (per point)

1.20

1.17–1.24

< .001

 

Not included

 

1.15

1.11–1.19

< .001

  1. 1812 patients with complete SOFA-score on day of transfer
  2. a Age deducted from score (see Methods)
  3. bSee Additional file 1: Table S1 for details of groups
  4. cChronic obstructive pulmonary disease
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