Table 1.
Comparison of depressive patients with and without a concurrent diagnosis of fibromyalgia.
| Depression (n = 31) |
Depression+FM (n = 31) |
t-test |
Effect size |
|||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | t | p | Cohen's d | 95% CI | |
| BDI-II | 36.16 | 8.55 | 40.74 | 9.62 | -1.98 | .03 | 0.49 | [0.01, 1.01] |
| Polarization | 31.02 | 13.80 | 39.54 | 17.07 | -2.16 | .02 | 0.54 | [0.04, 1.05] |
| PVAFF | 43.13 | 11.27 | 48.67 | 11.46 | -1.92 | .03 | 0.48 | [-0.20, 0.99] |
Note. FM = Fibromyalgia; BDI-II= Beck Depression Inventory-II; PVAFF= Percentage of Variance Accounted by the First Factor.