a trend towards significancep =0.068
The BDI scores also showed a difference among groups ( F 2, 188 =32.814, p =0.040) as a consequence of significantly higher values in the “naive group” than in the “add-on group” (“naive group”: 9.0±7.9, “add-on group”: 6.0±5.7; p =0.040) and a trend towards significance in the comparison between the “naive group” and the “switched group” (“naive group”: 9.0±7.9, “switched group”: 5.8±4.9; p =0.068).