METHODS
Patients The study participants were patients receiving psychiatric outpatient services at a medical center in Taiwan. The inclusion criteria were the following: patients must be (a) over 18 years of age; (b) diagnosed with a mood disorder according to DSMIV-TR criteria, including depressive disorder and bipolar disorder; and (c) able to follow instructions for answering the questionnaire. The required sample size was estimated to be at least 100 by the program G-Power, with an alpha of .05, a power