Table 2.
Clinical Characteristics of Patients Discharged Between January 1, 2009 and December 31, 2018 (n = 15,620)
| Variables | Total | No Readmission Within 10 Years | Readmission Within 10 Years | Statistics (X2/Z) | P-value |
|---|---|---|---|---|---|
| (n=15,620, 100%) | (n=11,933, 76.4%) | (n=3,687, 23.6%) | |||
| Length of stay(days) | −8.359 | <0.001 | |||
| ≤20 | 3,740 (23.9%) | 2,971 (24.9%) | 769 (20.9%) | ||
| 21–40 | 4,927 (31.5%) | 3,834 (32.1%) | 1,093 (29.6%) | ||
| 41–60 | 2,882 (18.5%) | 2,193 (18.4%) | 689 (18.7%) | ||
| 61–80 | 1,546 (9.9%) | 1,157 (9.7%) | 389 (10.6%) | ||
| 81–100 | 1,039 (6.7%) | 740 (6.2%) | 299 (8.1%) | ||
| ≥101 | 1,486 (9.5%) | 1,038 (8.7%) | 448 (12.2%) | ||
| Mean(SD) | 58.2 (111.7) | 57.8 (119.2) | 59.5 (82.7) | ||
| Median | 36 | 35 | 40 | ||
| Number of previous admissions | −21.586 | <0.001 | |||
| 0 | 12,143 (77.7%) | 9,749 (81.7%) | 2,394 (64.9%) | ||
| 1 | 2,944 (18.8%) | 1,875 (15.7%) | 1,069 (29.0%) | ||
| 2 | 307 (2.0%) | 188 (1.6%) | 119 (3.2%) | ||
| ≥3 | 226 (1.4%) | 121 (1.0%) | 105 (2.8%) | ||
| Charlson comorbidity index score | 41.853 | <0.001 | |||
| 0 | 10,240 (65.6%) | 7,908 (66.3%) | 2,332 (63.2%) | ||
| 1 | 3,546 (22.7%) | 2,732 (22.9%) | 814 (22.1%) | ||
| 2 | 1,108 (7.1%) | 793 (6.6%) | 315 (8.5%) | ||
| ≥3 | 726 (4.6%) | 500 (4.2%) | 226 (6.1%) | ||
| Number of psychiatric comorbidities | 0.102 | 0.750 | |||
| 0 | 14,625(93.6%) | 11,177(93.7%) | 3,448(93.5%) | ||
| ≥1 | 955(6.4%) | 756(6.3%) | 239(6.5%) | ||
| Diagnosis | 10.824 | 0.004 | |||
| Schizophrenia | 7,186(46.0%) | 5,544(46.5%) | 1,642(44.5%) | ||
| Depression | 2,566(16.4%) | 1,990(16.7%) | 576(15.6%) | ||
| Bipolar disorder | 5,868 (37.6%) | 4,399 (36.9%) | 1,469 (39.8%) | ||
| Days from discharge to readmission | |||||
| ≤30 | N/A | N/A | 589 (16.0%) | ||
| 31–90 | N/A | N/A | 321 (8.7%) | ||
| 91–180 | N/A | N/A | 403 (10.9%) | ||
| 181–365 | N/A | N/A | 656 (17.8%) | ||
| 366–730 | N/A | N/A | 755 (20.5%) | ||
| ≥731 | N/A | N/A | 963 (26.1%) | ||
| Median | 329 | ||||
Abbreviation: N/A, not applicable.