Relationship between objective and subjective sleep measures in depressed patients and healthy controls

The purpose of this study was to correlate subjective sleep characteristics based on questionnaire response, and objective sleep EEG features based on polysomnography, in 52 patients with major depressive disorders (MDD) and 49 healthy controls. With the exception of the number of awakenings, subjective and objective sleep measures were strongly correlated in both groups. Patients and controls were able to accurately judge time in bed, total sleep time and sleep latency. However, sleep quality, depth, and how rested participants felt upon awakening were not strongly correlated with objective sleep characteristics, particularly in those with MDD