Table 1 Characteristics of bipolar disorder self-poisoning, bipolar disorder non-self poisoning, and non-bipolar disorder self-poisoning suicide deaths
Variable | Bipolar disorder suicide deaths by self-poisoning (n = 76) | Bipolar disorder suicide deaths by other methods (n = 131) | Non-bipolar disorder suicide deaths by self-poisoning (n = 585) | Non-bipolar disorder suicide deaths by other methods (n = 2527) | BD suicide deaths by self-poisoning vs. BD suicide deaths by other methods | BD suicide deaths by self-poisoning vs. non-BD suicide deaths by self-poisoning | BD suicide deaths by self-poisoning vs. non-BD suicide deaths by other methods | |||
|---|---|---|---|---|---|---|---|---|---|---|
X or t-score | p-value | X or t-score | p-value | X or t-score | p-value | |||||
Demographics | ||||||||||
 Sex (% male) | 38.2 | 67.2 | 52.5 | 76.0 | 16.5 | <.0001 | 5.73 | .057 | 56.50 | <.0001 |
 Age (mean years, SD) | 46.1, 11.3 | 42.6, 14.7 | 51.7, 16.0 | 46.3, 18.1 | 1.82 | .071 | −2.96 | .003 | −.084 | <.0001 |
 Age categories (%) (years) | ||||||||||
  ≤24 | <n = 5 | 9.9 | 32.5 | 11.4 | 3.01 | .222 | 11.84 | .003 | 15.40 | <.0001 |
  25–64 | 92.1 | 84.0 | 76.6 | 71.7 |  |  |  |  |  |  |
  ≥65 | <n = 5 | 6.1 | 20.2 | 16.9 |  |  |  |  |  |  |
 Marital status (%) | ||||||||||
  Married/common low | 18.4 | 22.1 | 21.2 | 27.0 | .733 | .866 | 4.84 | .184 | 7.10 | .131 |
  Divorced/separated/widowed | 23.7 | 19.8 | 22.7 | 18.4 |  |  |  |  |  |  |
  Single/no status available | 57.9 | 58.0 | 56.1 | 54.6 |  |  |  |  |  |  |
Living circumstances (% with others) | 48.7 | 54.2 | 45.8 | 58.0 | .586 | .444 | .223 | .637 | 2.63 | .105 |
Other history | ||||||||||
 Past suicide attempts (% yes) | 63.2 | 40.5 | 42.6 | 22.0 | 9.92 | .002 | 11.53 | .001 | 70.13 | <.0001 |
 Psychiatry/emergency room visit in past week (%) | 14.5 | 16.0 | 6.2 | 7.9 | .089 | .765 | 7.05 | .008 | 4.33 | .037 |
 Comorbid substance abuse (% drug or alcohol) | 34.2 | 22.9 | 27.9 | 18.1 | 3.12 | .077 | 1.33 | .249 | 12.61 | <.0001 |
 Comorbid medical condition (%) | 40.8 | 29.0 | 53.8 | 28.5 | 3.00 | .083 | 4.59 | .032 | 5.40 | .020 |
Recent stressors | ||||||||||
 Any identified stressor (%) | 36.8 | 41.2 | 51.5 | 52.3 | .39 | .535 | 5.74 | .017 | 7.04 | .008 |
 Bereavement (%) | 7.9 | 4.6 | 8.7 | 4.5 | .97 | .325 | .058 | .810 | 1.92 | .166 |
 Employment/Financial (%) | 9.2 | 16.0 | 12.5 | 20.1 | 1.91 | .167 | .675 | .411 | 5.48 | .019 |
 Interpersonal-conflict or relationship breakup (%) | 21.1 | 22.1 | 20.9 | 23.6 | .03 | .855 | .002 | .968 | .26 | .608 |
 Recent health/medical (%) | <n = 5 | 6.9 | 17.3 | 11.3 | 1.72 | .190 | 10.95 | .001 | 5.66 | .017 |
 Police/legal (%) | 6.6 | 5.3 | 4.8 | 7.1 | .13 | .714 | .456 | .500 | .03 | .855 |
Suicide details | ||||||||||
 Presence of a suicide note (%) | 36.8 | 33.6 | 39.3 | 28.9 | .23 | .636 | .173 | .677 | 2.26 | .133 |
 Suicide at home (%) | 75.0 | 61.1 | 72.5 | 61.2 | 4.17 | .041 | .216 | .642 | 5.96 | .015 |