Table 1.
Comparison of Smoking and Nonsmoking Primary Care Patients With Depression (Intention-to-Treat Analysis), by Variable (N = 5155).
| Smokers (n = 1522) | Nonsmokers (n = 3633) | P | |
|---|---|---|---|
| Age: median (range) | 35.7 (18.1-85.8) | 38.5 (18.1-96.9) | <.001 |
| Gender: % female (n) | 71.8 (1093) | 78.6 (2856) | <.001 |
| Married: % (n) | 31.4 (478) | 51.2 (1860) | <.001 |
| Race: % white (n) | 93.0 (1415) | 92.6 (3365) | .662 |
| Initial PHQ-9 score: median (range 10-27) | 16.0 | 14.0 | <.001 |
| Diagnosis, % (n) | .002 | ||
| First episode | 46.5 (708) | 51.8 (1882) | |
| Recurrent depression | 43.7 (665) | 39.7 (1444) | |
| Dysthymia | 9.8 (149) | 8.5 (307) | |
| Treatment: % CCM (n) | 52.6 (800) | 62.3 (2264) | <.001 |
| Compliance at 6 months: % (n) | 43.1 (656) | 54.4 (1975) | <.001 |
| 6-month PHQ-9 score <5, % (n) | 14.8 (225) | 26.0 (946) | <.001 |
| 6-month PHQ-9 score ≥10, % (n) | 73.9 (1124) | 60.3 (2189) | <.001 |
Abbreviations: PHQ-9, Patient Health Questionnaire–9; CCM, collaborative care management.