Study design
mood disorders
ADVERSE EVENT
A randomized controlled trial spanning a duration of 4 weeks was conducted among patients diagnosed with mood disorders who were randomly assigned to either a bright light exposure group (BL group) or a dim light exposure group (DL group). Eligible participants were recruited from the patients visiting Oita University Hospital. Written informed consent was obtained from all the patients. Patient participation was withdrawn if they revoked their consent, a significant adverse event occurred, or they failed to adhere to the study schedule. We confirm that the methodology utilized in this study was in accordance with the ethical standards and relevant national and institutional guidelines for human experimentation as well as the principles outlined in the 1975 Helsinki Declaration (revised in 2008). The study protocol was approved by the Institutional Review Board of Oita University Faculty of Medicine (B15-019). The study registration number is UMIN000019220. The study was initiated on 16 October 2015 and completed on 19 February 2021. Figure 