Table 2 Self-harm histories by offender group
|  | Total Sample (n = 2114) | ChildSO (n = 77) | AdultSO (n = 160) | PolySO (n = 43) | Violent (n = 1269) | Non-sexual non-violent (n = 552) | X2 | p (Φ/ ΦC) |
|---|---|---|---|---|---|---|---|---|
Ever self-harmed | ||||||||
 0 No | 86.8% | 89.2% | 85.7% | 0 | 84.7% | 90.3% | 17.000** | .002 (.09) |
 1 Yes | 13.2% | 10.8% | 14.3% |  | 15.3% | 9.7% |  |  |
Number of times | Â | Â | Â | Â | Â | Â | 7.180+ | .066 (.17) |
 1 Once | 44.7% | 57.1% | 52.4% | – | 39.3% | 58.8% |  |  |
 2 Twice or more | 55.3% | 42.9% | 47.6% | – | 60.7% | 41.2% |  |  |
Self-harmed in prison | ||||||||
 0 No | 71.5% | 57.1% | 71.4% | – | 72.4% | 70.6% | .798 | .850 (.06) |
 1 Yes | 28.5% | 42.9% | 28.6% |  | 27.6% | 29.4% |  |  |
Planned self-harm | ||||||||
 0 No | 60.3% | 57.1% | 47.4% | – | 61.6% | 61.2% | 1.496 | .683 (.08) |
 1 Yes | 39.7% | 42.9% | 52.6% |  | 38.4% | 38.8% |  |  |
Method of last self-harm | Â | Â | Â | Â | Â | Â | 21.943* | .038 (.17) |
 1 Choke-inducing behaviours | 3.1% | 0 | 19.0% | – | 1.7% | 2.0% |  |  |
 2 Impact with object | 15.8% | 14.3% | 9.5% | – | 16.7% | 15.7% |  |  |
 3 Overdose or poisoning | 4.2% | 0 | 0 | – | 4.4% | 5.9% |  |  |
 4 Use of an object | 73.7% | 85.7% | 66.7% | – | 74.4% | 72.5% |  |  |
 5 Other | 3.1% | 0 | 4.8% | – | 2.8% | 3.9% |  |  |
More likely to self-harm in prison than community | ||||||||
 0 No | 69.0% | 57.1% | 71.4% | – | 68.4% | 71.4% | 3.475 | .747 (.12) |
 1 Yes | 31.0% | 42.9% | 28.6% |  | 31.6% | 28.6% |  |  |