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Multivariable Cox Proportional Hazards Model Showing Hazard Ratio for Death in Selective Serotonin Reuptake Inhibitor (SSRI)-Treated Patients With Non-SSRI-Treated Patients Used As a Reference
| Grade | HR | CI | P value |
|---|---|---|---|
| Grade 4 | 0.94 | 0.64–1.37 | .737 |
| Grade 2-3 | 0.42 | 0.21–0.84 | .013 |
