Table 1 Characteristics of patients and hospitals cohorts in the study (Patients N = 46,170)
From: Consultation-liaison psychiatry in Japan: a nationwide retrospective observational study
Variables | Fiscal year | Proportion (2012) | Proportion (2016) | Rate of increase (2016 vs. 2012) | ||||
|---|---|---|---|---|---|---|---|---|
2012 | 2013 | 2014 | 2015 | 2016 | ||||
Patients | 3989 | 5352 | 8358 | 11,408 | 17,064 | Â | Â | 428% |
Consultation-Liaison Psychiatry | ||||||||
 Overall | 11,800 | 17,807 | 26,283 | 35,084 | 47,912 |  |  | 406% |
 Per patient (mean, SD) | 2.96 (2.73) | 3.33 (3.64) | 3.14 (3.14) | 3.08 (3.15) | 2.81 (2.75) |  |  | – |
 Per patient (median, interquartile range) | 2 [1–4] | 2 [1–4] | 2 [1–4] | 2 [1–4] | 2 [1–3] |  |  | – |
 Per patient (range) | 1–29 | 1–67 | 1–40 | 1–48 | 1–80 |  |  |  |
 Coefficient of variation | 0.92 | 1.10 | 1.00 | 1.03 | 0.98 |  |  | – |
 Hospitals | 30 | 34 | 42 | 51 | 109 |  |  | 363% |
Age group | ||||||||
 0–29 | 164 | 231 | 327 | 479 | 662 | 4.1% | 3.9% |  |
 30–49 | 542 | 796 | 1193 | 1299 | 2019 | 13.6% | 11.8% |  |
 50–64 | 721 | 1013 | 1431 | 1795 | 2556 | 18.1% | 15.0% |  |
 65–74 | 778 | 1127 | 1746 | 2536 | 3527 | 19.5% | 20.7% |  |
 75–84 | 1168 | 1391 | 2386 | 3279 | 5061 | 29.3% | 29.7% |  |
 85+ | 616 | 794 | 1275 | 2020 | 3239 | 15.4% | 19.0% |  |
Sex | ||||||||
 Male | 2026 | 2651 | 4290 | 6023 | 9015 | 50.8% | 52.8% |  |
 Female | 1963 | 2701 | 4068 | 5385 | 8049 | 49.2% | 47.2% |  |
Admission setting | ||||||||
 Planned | 1451 | 1887 | 3023 | 4051 | 5497 | 36.4% | 32.2% |  |
 Unplanned or Urgent | 2538 | 3465 | 5335 | 7357 | 11,567 | 63.6% | 67.8% |  |
Discharge setting | ||||||||
 Outpatients follow up | 2413 | 3209 | 4730 | 6255 | 9100 | 60.5% | 53.3% |  |
 Transfer to other hospitals | 966 | 1311 | 2231 | 3334 | 5238 | 24.2% | 30.7% |  |
 Transfer to other welfare facilities | 139 | 173 | 486 | 611 | 876 | 3.5% | 5.1% |  |
 Others | 471 | 659 | 911 | 1208 | 1850 | 11.8% | 10.8% |  |
Discharge outcome | ||||||||
 Treated | 3177 | 4331 | 6709 | 9370 | 14,025 | 79.6% | 82.2% |  |
 Unchanged or worsened | 358 | 333 | 671 | 789 | 1124 | 9.0% | 6.6% |  |
 Death | 385 | 539 | 783 | 985 | 1505 | 9.7% | 8.8% |  |
 Other | 69 | 149 | 195 | 264 | 410 | 1.7% | 2.4% |  |
Length of stay | ||||||||
 2–17 days | 989 | 1189 | 2294 | 3179 | 4754 | 24.8% | 27.9% |  |
 18–30 days | 938 | 1269 | 1941 | 2724 | 4330 | 23.5% | 25.4% |  |
 31–54 days | 1038 | 1315 | 1952 | 2798 | 4211 | 26.0% | 24.7% |  |
 55 days and over | 1024 | 1579 | 2171 | 2707 | 3769 | 25.7% | 22.1% |  |