Table 3 Chi-square test of association between self-harm and suicidal behaviours in the sample and in each group
|  | Global n = 724 | ASC n = 154 | BPD n = 111 | NC n = 459 | ||||
|---|---|---|---|---|---|---|---|---|
Suicide attempts | No suicide attempts | Suicide attempts | No suicide attempts | Suicide attempts | No suicide attempts | Suicide attempts | No suicide attempts | |
Self-harm | 147 (20%) | 183 (25%) | 39 (25%) | 40 (26%) | 75 (68%) | 16 (14%) | 33 (7%) | 127 (28%) |
No self-harm | 53 (7%) | 341 (47%) | 21 (14%) | 54 (35%) | 11 (10%) | 9 (8%) | 21 (5%) | 278 (61%) |
χ2 | 86.8 | 7.39 | 7.06 | 18.6 | ||||
p value |  < 0.001*** | 0.007** | 0.008** |  < 0.001*** | ||||