Relationship between EEG sleep measures and clinical ratings of depression. A revisit.

The relationship between clinical and behavioral ratings and EEG sleep variables has been controversial, leading to a possible premature abandonment of the possible significance for these interrelationships. Instead, our reexamination of this issue in 62 depressed patients suggests that while the strength of these relationships do not account for the majority of variance, correlations between EEG sleep and behavioral measures should not be disregarded as trivial, for the degree of these relationships is commensurate with other behavioral-biological relationships.