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Table 3 Factors associated with readmission within 30 days of discharge for 5 types of psychiatric disorder, derived from a GEE model

From: Readmission rates of South Korean psychiatric inpatients by inpatient volumes per psychiatrist

 

OR

95 % CI

Patient-level

   

Diagnosis

   

 Organic, including symptomatic, mental disorders

1.00

 Mental and behavioral disorders due to psychoactive substance use

1.56

1.10

2.22

 Schizophrenia, schizotypal, and delusional disorders

3.86

2.78

5.36

 Mood disorders

1.10

0.79

1.54

 Neurotic, stress-related, and somatoform disorders

1.35

0.92

2.00

Length of stay (days)

   

  < 14

1.00

  ≥ 14

0.40

0.33

0.49

Sex

   

 Male

1.00

 Female

0.63

0.54

0.74

Age (years)

   

  ≤ 29

1.00

 30–39

1.37

1.00

1.86

 40–49

1.56

1.17

2.07

 50–59

1.82

1.36

2.43

 60–69

2.27

1.69

3.05

 70–79

1.28

0.91

1.81

Year

   

 2010

1.00

 2011

1.26

0.92

1.74

 2012

1.97

1.45

2.68

 2013

4.61

3.35

6.35

Hospital-level

   

Inpatient volumes per psychiatrist

   

 Low

0.38

0.28

0.51

 Mid-low

0.48

0.36

0.63

 Mid-high

0.55

0.44

0.69

 High

1.00

Number of psychiatrists

0.87

0.80

0.95

Number of pharmacists

0.94

0.92

0.96

Number of nurses (per 10 nurse increase)

0.98

0.96

0.99

Number of beds (per 100 bed increase)

1.48

1.35

1.63

Proportion of psychiatric beds (per 10 % increase)

1.08

1.02

1.15

Psychiatric bed occupancy rate (per 10 % increase)

0.99

0.97

1.00

Teaching status

   

 Nonteaching hospital

1.39

1.00

1.91

 Teaching hospital

1.00

Ownership

   

 Public

1.00

 Private

3.00

2.41

3.74

Type of medical institution

   

 Hospital

1.00

 General hospital

0.35

0.27

0.47

  1. Abbreviations: CI confidence interval, OR odds ratio