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Table 4 Linear regression analysis of the natural logarithm of length of stay

From: Association between length of hospital stay and implementation of discharge planning in acute psychiatric inpatients in Japan

  Coefficient 95% CI p value
Intercept 2.41 1.89–2.93 <0.001
Fixed effect    
Age at admission, year 0.01* 0.01–0.02 <0.001
Sex, male 0.11 −0.05–0.28 0.183
Education level (junior high school = 0)
 High school −0.02 −0.23–0.19 0.848
 Vocational school, college 0.14 −0.16–0.44 0.361
 University 0.04 −0.23–0.31 0.771
 Unidentified −0.16 −0.49–0.17 0.337
Working status before admission (not engaged in work = 0)
 Engaged in work −0.15 −0.33–0.02 0.083
 Unidentified −0.23 −0.66–0.19 0.285
Primary diagnosis (other = 0)
 Schizophrenic 0.40* 0.20–0.59 <0.001
 Affective disorder 0.18 −0.05–0.41 0.129
Compulsory admission 0.47* 0.27–0.67 <0.001
Total number of psychiatric admissions −0.01 −0.03–0.01 0.267
Physical comorbidity 0.04 −0.17–0.24 0.714
Current place of residence (cohabitation with family = 0)
 Lives alone at own home −0.18 −0.42–0.05 0.130
 Residential care facility 0.01 −0.35–0.37 0.921
 Readmitted to hospital from home −0.18 −0.59–0.22 0.372
 Dead shortly after discharge −0.49 −1.72–0.74 0.435
 Place of residence unidentified −0.21 −0.56–0.15 0.258
Social functioning at discharge −0.03 −0.08–0.02 0.255
Follow-up outpatient service after discharge (follow-up outpatient service by the hospital = 0)
 Follow-up outpatient service of other hospital −0.35* −0.54 to −0.17 <0.001
 No follow-up/unidentified −1.17* −1.63 to −0.72 <0.001
Received support on community care coordination 0.61* 0.43–0.80 <0.001
Random effect    
Residual 0.73 0.63–0.84  
Intercept: hospital 0.003 10−11 × 0.28 − 23,291.62
Intra-class correlation coefficient (ICC) <0.001   
Fitness of model    
χ2 (23) 178.61   <0.001
Log likelihood −566.48   
Akaike’s information criterion (AIC) 1,182.97   
  1. * Significant at p < 0.05.