SLEEP 2011 Abstract Supplement

B. Clinical Sleep Science XII. Sleep and Aging
0883
SLEEP DISCREPANCY, SLEEP COMPLAINT, AND POOR
SLEEP AMONG OLDER ADULTS
Williams JM 1 , Kay DB 1 , Rowe M 2 , McCrae C 1
1
Clinical and Health Psychology, University of Florida, Gainesville,
FL, USA, 2 Nursing, University of Florida, Gainesville, FL, USA
Introduction: Discrepancy between sleep diary and actigraphic measured
sleep has been documented among those with insomnia. While
aspects of this difference may reflect measurement error, considerable
portions of sleep discrepancy (SD) may be meaningful.
Methods: The current study explored SD in four groups of community
dwelling older adults: good sleeping complainers, poor sleeping complainers,
good sleeping non-complainers and poor sleeping non-complainers.
Participants (N = 153, Mean age = 71.6) were screened for
comorbid sleep disorders, completed demographic questions, BDI-II,
and 14 consecutive nights of sleep diaries and actigraphy.
Results: A MANCOVA [F(12,331.01) = 8.876, p < 0.001] controlling
for gender, medical conditions, medications, and depression symptoms
showed significant group differences on relative amounts of SOL
[F(3,128) = 11.566, p < 0.001] and WASO [F(3,128) = 13.928, p <
0.001] SD and frequency of SOL [F(3,128) = 8.883, p < 0.001] and
WASO SD [F(3,128) = 28.102, p < 0.001]. Greater amount and frequency
of WASO SD (p’s < 0.01) best separated poor sleeping complainers
from the other groups. Among those with poor sleep (regardless of complaint),
there was little difference in SOL SD (quantity or frequency).
A multiple regression analysis predicting depressive symptoms showed
an association between the quantity of SOL (β = 0.39) and WASO (β =
0.323) SD beyond medical and demographic factors [F(8,127) = 6.52, p
< 0.001, r2 = 0.291].
Conclusion: These results suggest that older adults with poor sleep have
heightened awareness of idle time in bed and that this impact is more
pronounced in the middle of the night among individuals with a sleep
complaint. Furthermore, these results suggest that the degree to which
participants’ self report of SOL and WASO exceeded actigraphy was
associated with more depressive symptoms. The concurrent patterns of
sleep discrepancy and depressive symptoms may be linked through the
effects of cognitive hyperarousal, which has been independently suggested
as an explanation for depression, sleep discrepancy and insomnia.
Support (If Any): This project was supported by a grant from the National
Institute of Health/National Institute of Aging (1 R21 AG024459-
01 Christina S. McCrae, PhD, PI).
0884
SELF-REPORTED SLEEP DURATION IN ADULTS: CHANGE
AND CORRELATES OF CHANGING DURATION OVER
20 YEARS OF FOLLOW-UP IN THE WISCONSIN SLEEP
COHORT STUDY
Hagen EW, Barnet JH, Young T, Peppard PE
Population Health Sciences, University of Wisconsin, Madison, WI,
USA
Introduction: Short and long usual sleep durations are associated with
health decrements and increased mortality. Reports of repeated crosssectional
evaluations of sleep duration have suggested a pattern of decreasing
mean duration in recent decades; however, there have been
almost no studies examining longitudinal trends in US adults. We use
>20 years of self-reported sleep duration data from the Wisconsin Sleep
Cohort Study to characterize within-subject trends in sleep duration.
Methods: 1686 Wisconsin Sleep Cohort Study subjects (58% female,
30-61 years old in 1988) provided 7825 (from 3 up to 9 per subject)
survey and interview-based self-reports of usual sleep duration between
1988 and 2010. We fit individual-level sleep duration slopes (change in
duration over time) by linear regression and examined the association of
subjects’ slopes with sex, baseline age (