Table 1. The characteristics of demographic and emergency service utilization among total admissions and involuntary admissions in the psychiatric emergency service.
| Variables | Total admissions | Involuntary admissions | ||
|---|---|---|---|---|
| N = 2777 | n = 110 | |||
| n (%) | n | Rate (%) | P value a | |
| Demographic characteristics | ||||
| Gender | 0.644 | |||
| Male | 1379 (49.7) | 57 | 4.1 | |
| Female | 1398 (50.3) | 53 | 3.8 | |
| Age (year, M±SD) | 42.2±14.6 | 41.9±12.3 | 0.864 | |
| Age | 0.225 | |||
| ≦29 | 554 (20.4) | 17 | 3.1 | |
| 30–49 | 1384 (50.9) | 63 | 4.6 | |
| ≧50 | 783 (28.8) | 27 | 3.4 | |
| Emergency service utilization pattern | ||||
| Catchment area referral | 0.541 | |||
| Yes | 1818 (65.5) | 75 | 4.1 | |
| No | 959 (34.5) | 35 | 3.6 | |
| Police referral | <0.001 | |||
| Yes | 1433 (51.6) | 84 | 5.9 | |
| No | 1344 (48.4) | 26 | 1.9 | |
| Nighttime arrival | 0.355 | |||
| Yes | 1483 (53.4) | 54 | 3.6 | |
| No | 1294 (46.6) | 56 | 4.3 | |
| Nighttime discharge | 0.075 | |||
| Yes | 76 (2.7) | 6 | 7.9 | |
| No | 2701 (97.3) | 104 | 3.9 | |
| Length of stay (hour, M±SD) | 20.8±15.4 | 27.6±14.7 | <0.001 | |
a For categorical variables, chi-square test was used to compare the rates of involuntary admission between different categories of each characteristics. For continuous variables, independent-samples t test was used to test the differences in means between voluntary and involuntary admission.