Outcome measures at baseline and follow-up by intervention group
| Measure | Usual care (N=15) | Symptoms Clinic (N=11) | Comparison* | ||||
| Baseline | Follow-up | Baseline | Follow-up | Difference | 95% CI | SD† | |
| PHQ-14 | 14.6 | 12.4 | 15 | 11.7 | −1.0‡ | −3.8 to 1.9 | 3.5 |
| SF-12-PCS | 35.0 | 35.3 | 33.7 | 38.8 | 3.8 | −1.1 to 8.9 | 6.1 |
| SF-12-MCS | 41.2 | 45.2 | 45.8 | 44.5 | −2.3 | −7.6 to 3.1 | 6.4 |
| PHQ-9 | 7.8 | 6.7 | 9.2 | 8.4 | 0.64 | −2.1 to 3.4 | 3.4 |
| GAD-7 | 5.4 | 5.2 | 6.5 | 5.9 | −0.1 | −2.9 to 2.8 | 3.4 |
↵* By analysis of covariance including baseline value.
↵† SD of the residuals from the analysis of covariance.
↵‡ The mean difference in scores between groups is influenced by one apparent outlier in the usual care arm with a drop of 12 points between baseline and outcome. Removing this case changes the adjusted difference to −1.8 (−4.3 to 0.7) with residual SD of 3.0.
GAD-7, general anxiety disorder 7 questionnaire; MCS, mental component summary; PCS, physical component summary; PHQ, patient health questionnaire; SF-12, medical outcomes survey short form 12.