Table 7. Model estimates with total suicide rate as outcome and the interaction with period.
| Regression coefficient | SE | T | p-value | |
| DDD/1000/day | –.479 | .066 | –7.232 | <.001 |
| Period | –6.991 | .714 | –9.791 | <.001 |
| DDD/1000/day×Period | .413 | .064 | 6.460 | <.001 |
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