TABLE 3.
Description and comparison of clinical features by CSU.
| Variable | Yes (n = 89) | No (n = 149) | χ2 | df | p | OR | CI | ||
|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | ||||||
| Method of self-harm | - | - | - | - | - | - | - | - | - |
| Self-poison | 57 | 64.0 | 136 | 91.3 | 26.9 | 1 | 0.000 | 5.87 | 2.73–12.8 |
| Prescription medication | 32 | 36.0 | 66 | 44.3 | - | - | - | - | - |
| Non-prescription medication | 10 | 11.2 | 23 | 15.4 | - | - | - | - | - |
| Ingestion or inhalation of poison | 5 | 5.6 | 14 | 9.4 | - | - | - | - | - |
| Mixed method of self-poisoning | 10 | 11.2 | 33 | 24.3 | - | - | - | - | - |
| Damage body tissue | 24 | 26.8 | 11 | 7.4 | 16.8 | 1 | 0.000 | 4.60 | 2.01–10.7 |
| Laceration | 9 | 10.1 | 6 | 4.0 | - | - | - | - | - |
| Hanging | 9 | 10.1 | 3 | 2 | - | - | - | - | - |
| Asphyxiation | 1 | 1.1 | 0 | - | - | - | - | - | - |
| Immolation | 1 | 1.1 | 0 | - | - | - | - | - | - |
| Jumped off a height | 2 | 2.2 | 0 | - | - | - | - | - | - |
| Jumped in front of a train | 2 | 2.2 | 2 | 1.3 | - | - | - | - | - |
| Mixed method (i.e. self-poison and damage to body tissue) | 6 | 6.7 | 2 | 1.3 | - | - | - | - | - |
| Not known | 2 | 2.2 | 0 | - | - | - | - | - | - |
| Pierce Suicide Intent Scale (PSIS)† | - | - | - | - | 0.037 | 1 | 0.847 | - | - |
| Low to moderate suicide intent | 26 | 29.2 | 60 | 40.3 | - | - | - | - | - |
| High suicide intent | 12 | 13.5 | 30 | 20.1 | - | - | - | - | - |
| Not known | 51 | 57.3 | 59 | 39.6 | - | - | - | - | - |
| Received a psychiatric assessment | - | - | - | - | 49.0 | 1 | 0.000 | 8.05 | 4.16–15.7 |
| Yes | 18 | 20.2 | 100 | 67.1 | - | - | - | - | - |
| No | 71 | 79.8 | 49 | 32.9 | - | - | - | - | - |
| History self-harm | - | - | - | - | 7.47 | 1 | 0.006 | 2.51 | 1.22–5.16 |
| History of self-harm | 45 | 50.6 | 44 | 29.5 | - | - | - | - | - |
| No history of self-harm | 20 | 22.5 | 49 | 32.9 | - | - | - | - | - |
| Not known | 24 | 27 | 56 | 37.6 | - | - | - | - | - |
| Impulsive self-harm | - | - | - | - | 8.15 | 1 | 0.004 | - | - |
| Yes | 13 | 14.6 | 43 | 28.9 | - | - | - | - | - |
| No | 76 | 85.4 | 94 | 63.8 | - | - | - | - | - |
| Not known | 6 | 6.7 | 11 | 7.4 | - | - | - | - | - |
Notes: Total sample = 238. Chi-square statistics were calculated for categorical variables: method of self-harm, level of suicidal intent, and whether or not a psychiatric assessment was received, previous attempt of self-harm, and impulsive act.
OR, odds ratio; CI, confidence interval.
†
, Low to moderate suicide intent = a PSIS of 11 or lower; high suicide intent = PSIS score of 12 or more.