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Table 3 Result of logistic regression analysis in the derivation cohort and points assigned to each procedure

From: Procedure-based severity index for inpatients: development and validation using administrative database

Variable

β

exp(β)

95 % CI

P value

Points for procedure

Admission-precipitating diagnosis

  Acute myocardial infarction

Ref

    

  Congestive heart failure

−0.10

0.90

0.83 – 0.98

0.012

 

  Acute cerebrovascular disease

−0.11

0.90

0.82 – 0.97

0.010

 

  Gastrointestinal hemorrhage

−0.51

0.60

0.55 – 0.66

<0.001

 

  Pneumonia

0.04

1.04

0.95 – 1.13

0.405

 

  Septicemia

0.73

2.07

1.87 – 2.28

<0.001

 

Sex (female)

−0.12

0.89

0.86 – 0.91

<0.001

 

Age

  <60

Ref

    

  60–69

0.35

1.43

1.33 – 1.53

<0.001

 

  70–79

0.68

1.98

1.86 – 2.11

<0.001

 

  80–89

1.14

3.12

2.94 – 3.31

<0.001

 

  ≥90

1.60

4.96

4.65 – 5.30

<0.001

 

Charlson comorbidity index

  0

Ref

    

  1

0.03

1.03

0.98 – 1.07

0.233

 

  2

0.18

1.20

1.16 – 1.24

<0.001

 

  ≥3

0.72

2.05

1.96 – 2.14

<0.001

 

Procedure

  Invasive arterial pressure measurement

−0.30

0.74

0.68 – 0.81

<0.001

−3

  Blood tests (excluding coagulation)

−0.26

0.77

0.73 – 0.81

<0.001

−3

  Radiography

−0.20

0.82

0.79 – 0.86

<0.001

−2

  Urinalyses (excluding chemistry)

−0.18

0.84

0.81 – 0.87

<0.001

−2

  Temporary urinary catheterization

−0.18

0.84

0.74 – 0.94

0.004

−1

  Endocrinology tests

−0.06

0.94

0.91 – 0.97

<0.001

−1

  Bacterial microscopy or culture

−0.05

0.95

0.91 – 0.99

0.019

−1

  Acid-fast bacilli culture

−0.04

0.96

0.91 – 1.02

0.206

#

  Coagulation tests

−0.03

0.97

0.94 – 1.01

0.117

#

  Nucleic acid amplification tests

0.01

1.01

0.93 – 1.09

0.842

#

  Bacterial drug susceptibility tests

0.06

1.06

1.01 – 1.12

0.022

1

  Urine chemistry tests

0.10

1.10

1.00 – 1.21

0.041

1

  Heart rate/respiration monitoring

0.18

1.20

1.16 – 1.24

<0.001

2

  Peripheral intravenous infusion

0.18

1.20

1.16 – 1.24

<0.001

2

  Computed tomography scan

0.25

1.28

1.24 – 1.32

<0.001

3

  Pulse oximetry

0.29

1.33

1.29 – 1.37

<0.001

3

  Gastric drainage tube insertion

0.32

1.38

1.27 – 1.50

<0.001

4

  Urinary catheter insertion

0.47

1.60

1.55 – 1.66

<0.001

5

  Central venous catheter insertion

0.49

1.63

1.49 – 1.77

<0.001

5

  Use of catecholamines or vasopressin

0.70

2.02

1.92 – 2.13

<0.001

8

  Sputum suction

1.11

3.04

2.92 – 3.16

<0.001

12

  Intratracheal intubation

2.05

7.77

7.14 – 8.45

<0.001

23

  1. # No points assigned because of non-significance of the coefficient
  2. CI – confidence interval