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Table 4 Prediction of the length of stay by psychopathology and further characteristics (N = 2,939)

From: Does psychopathology at admission predict the length of inpatient stay in psychiatry? Implications for financing psychiatric services

 

Linear regression models

Logistic regression models †

 

EXP (B) *

EXP (95% CI) *

Corr. R2

EXP (B)

EXP (95% CI)

Nagelkerke R2

Syndrome scores & further characteristics

 

Model 5

  

Model 6

 

Intercept

21.08

18.33-24.23

 

0.925

  

Crisis intervention, yes

0.53

0.49-0.56

0.158

0.29

0.24-0.34

0.152

Apathy

1.03

1.02-1.04

0.182

   

Acute care, yes

0.73

0.67-0.78

0.202

0.47

0.39-0.58

0.176

Substance disorder, yes

0.78

0.72-0.83

0.219

0.53

0.44-0.64

0.203

Severity of illness, moderate to severe

1.27

1.19-1.37

0.233

1.72

1.43-2.06

0.221

Age

1.01

1.00-1.01

0.238

1.01

1.01-1.02

0.232

Psychotherapy, yes

1.27

1.12-1.43

0.241

1.83

1.32-2.53

0.237

Depressive syndrome

   

1.30

1.10-1.54

0.240

Compulsory medication, yes

1.33

1.16-1.53

0.244

1.64

1.15-2.33

0.243

Compulsory admission, yes

0.91

0.85-0.99

0.246

   

Personality disorder

   

0.72

0.55-0.95

0.245

Symptoms & further characteristics

 

Model 7

  

Model 8

 

Intercept

21.18

18.42-24.37

 

0.879

  

Crisis intervention, yes

0.52

0.49-0.56

0.158

0.29

0.24-0.34

0.152

Acute care, yes

0.73

0.68-0.79

0.181

0.48

0.39-0.58

0.176

Substance disorder, yes

0.78

0.73-0.84

0.202

0.54

0.45-0.65

0.203

Severity of illness, moderate to severe

1.27

1.18-1.36

0.221

1.68

1.40-2.02

0.221

Social withdrawal

(apathy), moderate to severe

1.17

1.08-1.26

0.232

   

Age

1.00

1.00-1.01

0.237

1.02

1.01-1.02

0.232

Social withdrawal

(apathy), moderate to severe

   

1.46

1.21-1.77

0.239

Disturbance of vitality (depressive syndrome), moderate to severe

1.13

1.04-1.23

0.241

   

Psychotherapy, yes

1.25

1.22-1.41

0.244

1.85

1.34-2.55

0.244

Compulsory medication, yes

1.31

1.13-1.49

0.247

   

Ruminating

(depressive syndrome), moderate to severe

1.11

1.02-1.21

0.249

   

Morning depressiveness (depressive syndrome), moderate to severe

1.21

1.03-1.42

0.250

1.83

1.17-2.86

0.247

Compulsory medication, yes

   

1.60

1.13-2.28

0.249

Lethargy

(apathy), moderate to severe

1.09

1.01-1.21

0.251

   

Personality disorder, yes

0.90

0.81-0.99

0.252

0.75

0.57-0.99

0.251

  1. Abbreviations: LOS = length of stay. * EXP (B), EXP (95% CI): Back-transformed regression coefficient and 95% confidence interval from the logarithmised scale to the original scale.
  2. † LOS ≤ 23 days (median) vs. LOS > 23 days (median) was used as the dependent variable. In model 6, syndrome scores were split at the median (≤ median vs. > median): apathy > 3 (median) vs. ≤ median; depressive syndrome > 4 (median) vs. ≤ median.
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BMC Psychiatry

ISSN: 1471-244X

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