For the past 4 years we have pursued the primary objective of this study: to determine the relationship of cardiovascular (CVD) risk factors to cognitive decline in the elderly. A total of 733 surviving male members (mean age=76.1 years) of the Western Collaborative Group Study were assessed on several global and specific measures of neuropsychological functioning. Since the role of CVD risk factors for abnormal cognitive aging in women is generally understudied, we added 558 older women to our study (277 examined and 281 by questionnaire; mean age=71.2 years). Taking maximum advantage of the previously and recently collected data has resulted in 25 published, presented, or submitted papers. Additionally, a number of analyses (presented in the Progress Report) support the conclusion of both cross-sectional and longitudinal associations between higher levels of blood pressure and lower levels of neuropsychological performance. These findings, however, and those of others in the literature, are based on the measurement of single-point resting blood pressures and do not take into account other aspects of blood pressure measured continuously over the course of a typical day. Since these characteristics have a stronger relationship to both cardiovascular and cerebrovascular end organ damage than do resting levels, we propose in this application to continue our examination of the BP-cognition association with the use of noninvasive ambulatory blood pressure monitoring over the course of 16 hours. The major objective will be to characterize both BP levels and variability during the day and night in 450 male and female subjects (age range=74 to 90 years) examined previously in the last round of examinations. Given that sleep-disordered breathing increases in prevalence with age and may result in both elevated nighttime blood pressure levels and variability as well as lower levels of neuropsychological performance, we also seek to characterize the presence or absence of significant apneic events (by noninvasive ambulatory in-home assessments) and test its mediating effect on the blood pressure-cognition association. A secondary set of analyses will utilize the biological and neuropsychological data collected in the 1992- 94 round of examinations (a total of 1,010 male and female subjects) to determine prospective relationships of blood pressure, neuropsychological functioning, and symptoms of sleep apnea with subsequent 5-year mortality. Completion of the research plan described herein will enable us, for the first time, to extend the findings obtained for single-point resting blood pressures to repeated measurements of blood pressure during both day and night. Accounting for the multifactorial nature of influences such as sleep apnea on both blood pressure and neuropsychological functioning in the elderly represents a unique and important advance of our study, suggesting new avenues to prevent or slow the rate of neuropsychological decline and premature mortality in the elderly.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
5R01AG009341-11
Application #
2686027
Study Section
Human Development and Aging Subcommittee 3 (HUD)
Project Start
1990-07-01
Project End
2000-11-30
Budget Start
1997-12-01
Budget End
2000-11-30
Support Year
11
Fiscal Year
1998
Total Cost
Indirect Cost
Name
Sri International
Department
Type
DUNS #
City
Menlo Park
State
CA
Country
United States
Zip Code
94025
Jarrold, William; Javitz, Harold S; Krasnow, Ruth et al. (2011) Depression and self-focused language in structured interviews with older men. Psychol Rep 109:686-700
Su, Xiaogang; Tsai, Chih-Ling (2005) Tree-augmented Cox proportional hazards models. Biostatistics 6:486-99
Swan, Gary E; Lessov-Schlaggar, Christina N; Carmelli, Dorit et al. (2005) Apolipoprotein E epsilon4 and change in cognitive functioning in community-dwelling older adults. J Geriatr Psychiatry Neurol 18:196-201
Bliwise, Donald L; Swan, Gary E (2005) Habitual napping and performance on the Trail Making Test. J Sleep Res 14:209-10
Eslinger, Paul J; Swan, Gary E; Carmelli, Dorit (2003) Changes in Mini-Mental State Exam in community-dwelling older persons over 6 years: relationship to health and neuropsychological measures. Neuroepidemiology 22:23-30
Swan, Gary E; Carmelli, Dorit (2002) Impaired olfaction predicts cognitive decline in nondemented older adults. Neuroepidemiology 21:58-67
Cheng, L S; Swan, G E; Carmelli, D (2000) A genetic analysis of smoking behavior in family members of older adult males. Addiction 95:427-35
Carmelli, D; Swan, G E; Bliwise, D L (2000) Relationship of 30-year changes in obesity to sleep-disordered breathing in the Western Collaborative Group Study. Obes Res 8:632-7
Cheng, L S; Carmelli, D; Swan, G E et al. (2000) Segregation analysis of drinking problem in elderly men and their first-degree relatives from the Western Collaborative Group Study. Ann Epidemiol 10:309-15
Qureshi, A I; Bliwise, D L; Bliwise, N G et al. (1999) Rate of 24-hour blood pressure decline and mortality after spontaneous intracerebral hemorrhage: a retrospective analysis with a random effects regression model. Crit Care Med 27:480-5

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