Table 3.
Differences in psychiatric diagnoses between suicide by rodenticide and paraquat (n=167a)
| Diagnosis | Rodenticide (n=17) | Paraquat (n=150)a | χ2 | p-value |
|---|---|---|---|---|
| Depressive disorder, n (%) | 9 (52.5) | 77 (51.3) | 0.02 | 0.900 |
| Major depressive disorder | 5 (29.4) | 37 (24) | 0.18 | 0.768 |
| Dysthymia | 4 (23.5) | 40 (26.7) | 0.08 | 1.000 |
| Adjustment disorder, n (%) | 2 (3.2) | 15 (14.4) | 5.43 | 0.020* |
| Bipolar depression, n (%) | 0 | 4 (2.7) | 0.46 | 1.000 |
| Schizophrenia or psychotic disorder, n (%) | 5 (29.4) | 6 (4.0) | 16.0 | 0.002** |
| Substance use disorder, n (%) | ||||
| Alcohol | 3 (17.6) | 36 (24.0) | 0.34 | 0.765 |
| Heroin | 0 | 11 (7.3) | 1.34 | 0.606 |
| Amphetamine, n (%) | 1 (5.9) | 16 (10.7) | 0.38 | 1.000 |
| Benzodiazepine, n (%) | 0 | 2 (1.3) | 0.23 | 1.000 |
Notes:
a
Seven suicide attempts by paraquat refused psychiatric consultation, leaving 150 with formal psychiatric diagnoses,
*
p<0.05,
**
p<0.01.