Table 1.

Overview of study procedures

HDRS Hamilton Depression Rating Scale, GDS-30 30-item Geriatric Depression Scale, SCOPA-SLEEP Scales for Outcomes in Parkinson’s Disease-Sleep, CSD Consensus Sleep Diary, MEQ Morningness-Eveningness Questionnaire, SCID-I Structured Clinical Interview for DSM-IV Axis I Disorders, UPDRS Unified Parkinson’s Disease Rating Scale, MMSE Mini Mental State Examination, WHO-QOL-BREF World Health Organization Quality of Life assessment, abbreviated version; ZBI Zarit Burden Interview, CEQ Credibility/Expectancy Questionnaire