Table 4.
Intensity Rate Ratios (95% Confidence Intervals) for Predictors of Assessment Intensity in Level 2 of the STAR*D Dataa
| Bupropion | Sertraline | Venlafaxine | ||||
|---|---|---|---|---|---|---|
| Covariate | IRR | 95% CI | IRR | 95% CI | IRR | 95% CI |
| Male sex | 1.08 | 0.91, 1.27 | 1.16 | 0.99, 1.36 | 1.02 | 0.88, 1.20 |
| Age, years | 1.04 | 0.96, 1.12 | 1.03 | 0.96, 1.11 | 1.07 | 0.99, 1.15 |
| Medical/psychiatric leave | 1.20 | 0.92, 1.56 | 0.86 | 0.63, 1.17 | 1.08 | 0.82, 1.44 |
| QIDS-SR at baseline | 1.00 | 0.98, 1.01 | 1.01 | 0.99, 1.02 | 0.99 | 0.97, 1.01 |
QIDS-SR |
1.01 | 0.98, 1.03 | 1.04 | 1.01, 1.06 | 1.01 | 0.98, 1.03 |
QIDS-SR 
|
0.93 | 0.84, 1.02 | 0.83 | 0.76, 0.92 | 0.89 | 0.83, 0.96 |
Abbreviations: CI, confidence interval, IRR, intensity rate ratio; QIDS-SR, Quick Inventory of Depressive Symptomology – self-rated; 
QIDS-SR, QIDS-SR at last visit minus QIDS-SR at baseline.
a Intensities measure the frequency of observation, with higher intensities indicating more frequent observation.