Title
Disagreement between subjective and actigraphic measures of sleep duration in a population-based study of elderly persons
Author
van den Berg, J.F.
van Rooij, F.J.A.
Vos, H.
Tulen, J.H.M.
Hofman, A.
Miedema, H.M.E.
Neven, A.K.
Tiemeier, H.
TNO Bouw
Publication year
2008
Abstract
Sleep duration is an important concept in epidemiological studies. It characterizes a night's sleep or a person's sleep pattern, and is associated with numerous health outcomes. In most large studies, sleep duration is assessed with questionnaires or sleep diaries. As an alternative, actigraphy may be used, as it objectively measures sleep parameters and is feasible in large studies. However, actigraphy and sleep diaries may not measure exactly the same phenomenon. Our study aims to determine disagreement between actigraphic and diary estimates of sleep duration, and to investigate possible determinants of this disagreement. This investigation was embedded in the population-based Rotterdam Study. The study population consisted of 969 community-dwelling participants aged 57-97 years. Participants wore an actigraph and kept a sleep diary for, on average, six consecutive nights. Both measures were used to determine total sleep time (TST). In 34% of the participants, the estimated TST in the sleep diaries deviated more than 1 h from actigraphically measured TST. The level of disagreement between diary and actigraphic measures decreased with subjective and actigraphic measures of sleep quality, and increased with male gender, poor cognitive function and functional disability. Actigraphically measured poor sleep was often accompanied by longer subjective estimates of TST, whereas subjectively poor sleepers tended to report shorter TST in their diaries than was measured with actigraphy. We recommend, whenever possible, to use multiple measures of sleep duration, to perform analyses with both, and to examine the consistency of the results over assessment methods. © 2008 European Sleep Research Society.
Subject
Urban Development
Health
Built Environment
Actigraphy
Elderly
Epidemiology
Sleep diary
Sleep duration
actimetry
adult
aged
arthralgia
article
clinical assessment
cognition
controlled study
depression
female
human
major clinical study
male
mini mental state examination
night sleep
priority journal
rating scale
scoring system
sleep parameters
sleep pattern
sleep time
structured questionnaire
Aged
Aged, 80 and over
Arthralgia
Cognition Disorders
Culture
Depression
Female
Humans
Male
Middle Aged
Mobility Limitation
Monitoring, Ambulatory
Motor Activity
Polysomnography
Reproducibility of Results
Self Disclosure
Sleep
Sleep Initiation and Maintenance Disorders
Statistics as Topic
Writing
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TNO identifier
240968
ISSN
0962-1105
Source
Journal of Sleep Research, 17 (3), 295-302
Document type
article