Actigraphy reliability with normal sleepers.

Introduction: Actigraphy has gained popularity as an objective method for measuring sleep in a home setting. We evaluated whether missing data affects the utility of actigraphy for the measurement of sleep parameters in normal sleepers.

Methods: We evaluated actigraphy data from 60 normal sleepers who participated in a study of the effects of changes in setting on sleep.

Association between report of insomnia and daytime functioning.

Objectives: The relationship between reports of insomnia and daytime functioning was investigated using hierarchical regression. The presence or absence of a report of insomnia was the predictor of primary interest. A number of covariates were included in the model: demographic variables, health variables, and quantitative sleep parameters.