Table 3 Logistic regression of 1-year frequent readmission (≥3 times/1 year) (N = 2492)
|  | Frequent readmission in 1 year (746/2492) | |
|---|---|---|
Univariate models | Multivariate model | |
Male (ref. female) | 1.73 (1.45, 2.06)** | 1.3 (1.04, 1.64)* |
Age (ref. (0–40]) | ||
 (40,65] | 3.19 (2.5, 4.07)** | 1.06 (0.77, 1.46) |
  > 65 | 6.39 (4.82, 8.48)** | 1.26 (0.84, 1.89) |
Insurance type (ref. no insurance) | ||
 Urban employee | 5.22 (3.22, 8.47)** | 1.69 (0.96, 2.96) |
 Urban resident | 1.88 (1.05, 3.35) | 1.2 (0.61, 2.34) |
 New rural cooperative | 0.84 (0.38, 1.88) | 1.3 (0.53, 3.16) |
 Other insurances | 2.14 (1.21, 3.8) | 0.92 (0.47, 1.81) |
Married (ref. not married) | 0.53 (0.44, 0.64)** | 0.89 (0.68, 1.15) |
Urban residents (ref. Suburb) | 2.66 (2.1, 3.36)** | 1.45 (1.07, 1.95)* |
Diagnosis (ref. Depressive disorders) | ||
 Bipolar disorders | 0.65 (0.4, 1.05) | 0.47 (0.27, 0.82)** |
 Schizophrenia and related disorders | 3.43 (2.35, 4.99)** | 0.78 (0.49, 1.26) |
 Substance use disorders | 1.67 (0.97, 2.88) | 0.81 (0.43, 1.54) |
 Other mental disorders | 3.28 (2.15, 5)** | 1.2 (0.72, 2.03) |
Count of comorbidities (ref. none) | ||
 1 | 2.55 (1.9, 3.44)** | 1.59 (1.11, 2.27)* |
  > 1 | 4.55 (3.52, 5.89)** | 1.95 (1.4, 2.71)** |
Use of ECT (ref. no ECT) | 0.19 (0.14, 0.26)** | 0.6 (0.4, 0.91)* |
Psychiatric hospitalizations 1 year prior to index admission (ref. none) | ||
 1 | 2.48 (1.84, 3.34)** | 1.66 (1.19, 2.32)** |
 2 | 10.55 (8.08, 13.79)** | 4.79 (3.45, 6.66)** |
  ≥ 3 times | 27.32 (20.41, 36.58)** | 10.02 (7.05, 14.24)** |
Admission sources (ref. emergency room) | ||
 Outpatient | 4.23 (3.24, 5.53) | 1.29 (0.91, 1.82) |
 Other | 0.95 (0.39, 2.3) | 0.93 (0.32, 2.75) |
Length of stay (ref. ≤20 days) | ||
  (20, 30] | 0.63 (0.38, 1.05) | 0.62 (0.36, 1.08) |
  (30, 40] | 0.96 (0.57, 1.62) | 0.84 (0.47, 1.49) |
  (40, 60] | 1.66 (1.06, 2.58)* | 1.3 (0.79, 2.14) |
  (60, 100] | 8.13 (5.65, 11.68)** | 2.48 (1.56, 3.95)** |
  > 100 | 6.01 (4.26, 8.47)** | 1.26 (0.79, 2.01) |
Hospital type | ||
 Tertiary hospitals (vs secondary hospitals) | 2.24 (1.68, 2.99)** | 2.3 (1.51, 3.51)** |
 Urban hospitals (vs rural hospitals) | 0.21 (0.17, 0.26)** | 0.86 (0.62, 1.19) |