Table 2 Multivariable model for the association with hospital mortality

IMCU in the hospital

No

1

Yes

0.63

0.45

0.88

0.007

`Basic observation' as ICU admission reason^a

No

1

Yes

0.60

0.44

0.81

0.001

SAPS II

Per unit

1.07

1.06

1.08

<0.001

Gender

Female

1

Male

1.14

0.97

1.33

0.110

Infection

No

1

Yes

1.38

1.17

1.62

<0.001

Intra-hospital location before ICU admission

Emergency room

1

IMCU

1.09

0.76

1.56

0.635

Other ICU

1.24

0.83

1.85

0.295

Ward, other

1.16

0.93

1.45

0.200

Days in hospital before ICU admission

<24 h

1

1-7 days

1.13

0.92

1.40

0.249

>7 days

1.79

1.35

2.36

<0.001

Adjusted number of ICU beds^b

< 8

1

8-12

1.45

0.89

2.36

0.133

>12

1.20

0.71

2.04

0.497

Type of admission to the ICU

Planned

1

Unplanned

1.42

1.11

1.83

0.006

Number of hospital beds

<500

1

500-1,000

2.29

1.61

3.25

<0.001

>1,000

1.59

1.09

2.30

0.015

Possibility of allocating extra beds inside the ICU

No

1

Yes

0.98

0.70

1.37

0.905

ICU nurse: patient ratio in daytime

<0.5

1

0.5-1

1.16

0.79

1.71

0.449

>1

1.30

0.80

2.10

0.285

Having intermediate care beds inside the ICU

No

1

Yes

0.99

0.73

1.35

0.968