| Hazard Ratio for Remission* (95% CI) | P Value | |
|---|---|---|
| Group | ||
| UC | Reference | |
| CCM | 2.48 (2.31–2.65) | <.0001 |
| Age (years) | ||
| 18–50 | Reference | |
| 51–64 | 1.00 (0.93–1.08) | .979 |
| 65–79 | 1.43 (1.27–1.60) | <.0001 |
| ≥80 | 1.29 (1.06–1.58) | .012 |
| Sex | .81 | |
| Female | Reference | |
| Male | 1.01 (0.94–1.08) | |
| Marital status | <.0001 | |
| Not married | Reference | |
| Married | 1.18 (1.11–1.26) | |
| Race | .113 | |
| White | Reference | |
| Nonwhite | 0.91 (0.80–1.02) | |
| Clinic | ||
| A | Reference | |
| B | 1.03 (0.93–1.14) | .563 |
| C | 1.34 (1.24–1.45) | <.0001 |
| D | 1.27 (1.17–1.38) | <.0001 |
| Diagnosis | ||
| Initial | Reference | |
| Recurrent | 0.87 (0.82–0.93) | <.0001 |
| Dysthymia | 0.98 (0.89–1.08) | .681 |
| Initial PHQ-9 score | ||
| Moderate (10–14) | Reference | |
| Moderately severe (15–19) | 0.80 (0.75–0.85) | <.0001 |
| Severe (20–27) | 0.71 (0.65–0.77) | <0.0001 |
↵* Remission is defined as a 9-item Patient Health Questionnaire (PHQ-9) score <5.
CCM, collaborative care management; CI, confidence interval; PHQ-9, 9-item Patient Health Questionnaire; UC, usual care.