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Table 3 Prediction of the length of stay of psychiatric inpatients by psychopathology (N = 3,220)

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

   Linear regression models   Logistic regression models
  r ** EXP (B)+ EXP (95% CI)+ Corr. R2 rφ ** EXP (B) EXP (95% CI) Nagelkerke R2
Syndrome scores Model 1 Model 2
Intercept   16.22 15.29-17.09    0.564   
Apathy 0.211 1.04 1.04-1.06 0.040 0.131 1.39 1.19-1.62 0.023
Paranoid-hallucinatory syndrome 0.112 1.02 1.01-1.03 0.047 0.090 1.41 1.20-1.63 0.031
Psycho-organic syndrome 0.108 1.02 1.01-1.03 0.050 0.090 1.33 1.15-1.54 0.036
Depressive syndrome      0.096 1.36 1.16-1.59 0.042
Neurological syndrome      0.057 1.34 1.03-1.75 0.044
Symptoms Model 3 Model 4
Intercept   17.88 17.13-18.67    0.76   
Social withdrawal (apathy) 0.159 1.23 1.14-1.35 0.025 0.123 1.64 1.39-1.93 0.020
Memory disturbance (short-term) (psycho-organic syndrome)      0.104 1.43 1.10-1.86 0.033
Morning depressiveness (depressive syndrome) 0.130 1.57 1.33-1.85 0.036 0.110 2.71 1.82-3.98 0.044
Memory disturbance (long-term) (psycho-organic syndrome)      0.103 1.51 1.11-2.03 0.047
Disturbance of vitality (depressive syndrome) 0.101 1.16 1.06-1.27 0.043     
Cognitive inhibition (apathy) 0.128 1.25 1.09-1.45 0.047     
Anxious (other) 0.106 1.14 1.05-1.24 0.049     
Lethargy (apathy) 0.106 1.13 1.03-1.25 0.051     
  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; r = correlation coefficient (Spearman), rφ = correlation coefficient (phi statistics). ** p < 0.01.
  2. LOS ≤ 23 days (median) vs. LOS > 23 days (median) was used as the dependent variable. In model 2, syndrome scores were split at the median (≤ median vs. > median): paranoid-hallucinatory syndrome > 0 (median) vs. ≤ median, yes; vegetative syndrome > 0 (median) vs. ≤ median; apathy > 3 (median) vs. ≤ median; compulsory syndrome > 0 (median) vs. ≤ median; neurological syndrome > 0 (median) vs. ≤ median; depressive syndrome > 4 (median) vs. ≤ median.