Abstract:
OBJECTIVE:To determine whether longitudinal cognitive decline is associated with increased risk of sleep disturbance in older, nondemented, community-dwelling women. METHODS:We studied 2,474 women (mean age 68.9 years) who were part of a prospective study started in 1986; women with baseline or follow-up evidence of possible dementia were excluded. Cognitive data were gathered over 15 years for modified Mini-Mental State Examination (mMMSE) and 13 years for Trails B; cognitive decline was defined as declining >1.5 SDs on the mMMSE (> or =3 points) or Trails B (>92 seconds). Sleep disturbance was measured objectively using actigraphy (Sleepwatch-O, Ambulatory Monitoring) at the 15-year follow-up visit; measures included total sleep hours, sleep efficiency, sleep latency, napping, and time awake after sleep onset (WASO). RESULTS:During follow-up, 11% of women declined on mMMSE and 15% on Trails B. Cognitive decliners were more likely than non-decliners to experience sleep disturbance at follow-up on most measures. For women who declined on mMMSE, adjusted ORs (aOR) (95% CI) were 1.71 (1.24, 2.37) for sleep efficiency <70%, 1.57 (1.12, 2.21) for sleep latency > or =1 hour, and 1.43 (1.07, 1.92) for WASO > or =90 minutes. Results were similar for women who declined on Trails B; in addition, these women were more likely to nap >2 hours per day (aOR: 1.73; 95% CI: 1.28, 2.33). Cognitive decline on either test was not associated with total sleep time. CONCLUSIONS:Cognitive decline is associated with sleep disturbance in nondemented community-dwelling elderly women.
journal_name
Neurologyjournal_title
Neurologyauthors
Yaffe K,Blackwell T,Barnes DE,Ancoli-Israel S,Stone KL,Study of Osteoporotic Fractures Group.doi
10.1212/01.wnl.0000265814.69163.dasubject
Has Abstractpub_date
2007-07-17 00:00:00pages
237-42issue
3eissn
0028-3878issn
1526-632Xpii
69/3/237journal_volume
69pub_type
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