Table 2. Proportional Hazards Regression Analysis by Positive vs Negative Results on the Primary Care–Posttraumatic Stress Disorder Screensa .
| Model | Positive PC-PTSD, baseline HR (95% CI) | Interaction between positive PC-PTSD and time | HR over time (95% CI) | ||||
|---|---|---|---|---|---|---|---|
| β (SE) | P value | Day 1 | Day 30 | Day 365 | Day 500 | ||
| 1: Unadjusted | 1.91 (1.44-2.52) | −0.0006 (0.0003) | .04 | 1.90 (1.44-2.52) | 1.87 (1.43-2.44) | 1.53 (1.31-1.78) | 1.41 (1.21-1.64) |
| 2: Adjusted for age and sex | 1.90 (1.43-2.53) | −0.0006 (0.0003) | .03 | 1.90 (1.43-2.53) | 1.87 (1.43-2.45) | 1.52 (1.30-1.77) | 1.40 (1.19-1.64) |
| 3: Adjusted for all demographic characteristics | 2.10 (1.57-2.80) | −0.0006 (0.0003) | .03 | 2.10 (1.57-2.79) | 2.06 (1.57-2.71) | 1.67 (1.42-1.96) | 1.54 (1.30-1.81) |
| 4: Adjusted for demographic characteristics and mental health diagnoses | 1.63 (1.22-2.17) | −0.0006 (0.0003) | .03 | 1.63 (1.22-2.17) | 1.60 (1.22-2.10) | 1.30 (1.11-1.53) | 1.19 (1.01-1.41) |
| 5: Adjusted for demographic characteristics, mental health diagnoses, treatment, and suicide attempts | 1.58 (1.19-2.11) | −0.0006 (0.0003) | .03 | 1.58 (1.19-2.10) | 1.55 (1.18-2.04) | 1.26 (1.07-1.48) | 1.16 (0.98-1.36) |
Abbreviation: HR, hazard ratio; PC-PTSD, Primary Care–Posttraumatic Stress Disorder Screen.
a
Includes 1 693 449 total screens.