Abstract:
:Backround: Night-time agitation is a frequent symptom of dementia. It often causes nursing home admission and has been linked to circadian rhythm disturbances. A positive influence of light interventions on night-time agitation was shown in several studies. The aim of our study was to investigate whether there is a long-term association between regional weather data (as indicator for daylight availability) and 24-hour variations of motor activity. METHODS:Motor activity of 20 elderly nursing home residents living with dementia was analyzed using recordings of continuously worn wrist activity monitors over a three-year period. The average recording duration was 479 ± 206 days per participant (mean ± SD). Regional cloud amount and day length data from the local weather station (latitude: 52°56'N) were included in the analysis to investigate their effects on several activity variables. RESULTS:Nocturnal rest, here defined as the five consecutive hours with the least motor activity during 24 hours (L5), was the most predictable activity variable per participant. There was a significant interaction of night-time activity with day length and cloud amount (F 1,1174 = 4.39; p = 0.036). Night-time activity was higher on cloudy short days than on clear short days (p = 0.007), and it was also higher on cloudy short days than on cloudy long days (p = 0.032). CONCLUSIONS:The need for sufficient zeitgeber (time cue) strength during winter time, especially when days are short and skies are cloudy, is crucial for elderly people living with dementia. Activity forecast by season and weather might be a valuable approach to anticipate adequately complementary use of electrical light and thereby foster lower night-time activity.
journal_name
Int Psychogeriatrjournal_title
International psychogeriatricsauthors
Wahnschaffe A,Nowozin C,Rath A,Floessner T,Appelhoff S,Münch M,Kunz Ddoi
10.1017/S1041610217001235subject
Has Abstractpub_date
2017-12-01 00:00:00pages
2071-2080issue
12eissn
1041-6102issn
1741-203Xpii
S1041610217001235journal_volume
29pub_type
杂志文章abstract::Cross-sectional data from Phase 1 of the Canadian Study of Health and Aging was used to examine the relationship between two self-report health measures: "How would you say your health is these days?"(HEALTH) and "How much do your health troubles stand in the way of your doing the things you want to do?"(TROUBLE). The...
journal_title:International psychogeriatrics
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journal_title:International psychogeriatrics
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journal_title:International psychogeriatrics
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journal_title:International psychogeriatrics
pub_type: 杂志文章,多中心研究
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journal_title:International psychogeriatrics
pub_type: 临床试验,杂志文章,随机对照试验
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