Table 3.
Adjusted Odds Ratio of Persistent Depressive Symptoms (PHQ-9 ≥10) at 6 Months With an Intention-to-Treat Analysis, by Variable (N = 5155).
| Adjusted Odds Ratio | CI | P | |
|---|---|---|---|
| Age (years) | 0.99 | 0.98-0.99 | <.001 |
| Gender (female) | 0.93 | 0.80-1.08 | .328 |
| Marital Status (married) | 0.93 | 0.81-1.07 | .330 |
| Race (white) | 0.57 | 0.43-0.74 | <.001 |
| Initial PHQ-9 score | 1.07 | 1.05-1.09 | <.001 |
| Diagnosis | |||
| First episode | Referent | Referent | Referent |
| Recurrent depression | 1.09 | 0.96-1.25 | .188 |
| Dysthymia | 1.08 | 0.85-1.037 | .535 |
| Smoking status/Treatment | |||
| Smoking/Usual care | Referent | Referent | Referent |
| Nonsmoking/Usual care | 0.81 | 0.61-1.09 | .159 |
| Smoking/CCM | 0.19 | 0.14-0.25 | <.001 |
| Nonsmoking/CCM | 0.11 | 0.09-0.14 | <.001 |
| Area under the ROC curve | 0.754 | 0.742-0.766 |
Abbreviations: PHQ-9, Patient Health Questionnaire–9; CCM, collaborative care management; CI, confidence interval; ROC, receiver operating characteristic.