Daniel J Biddle

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OBJECTIVES Validation of self-report assessment of habitual sleep duration and onset time in young people with mental ill-health. DESIGN Validation sample. SETTING Specialized early intervention centers for young people in Sydney, Australia. PARTICIPANTS One hundred and forty-six young people with mental ill-health. INTERVENTION N/A. MEASUREMENTS(More)
OBJECTIVES To examine whether poor objective and subjective sleep quality are differentially associated with cognitive function. DESIGN Cross-sectional. SETTING Participants were recruited from primary and secondary care, and directly from the community, in Sydney, Australia. PARTICIPANTS The sample consisted of 74 men 50years and older (mean [SD],(More)
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