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Endogenous sex hormones, cognitive decline, and future dementia in old men. 2006

Mirjam I Geerlings, and Dorothea Strozyk, and Kamal Masaki, and Alan T Remaley, and Helen Petrovitch, and G Webster Ross, and Lon R White, and Lenore J Launer
University Medical Center Utrecht, Julius Center for Health Sciences and Primary Care, Utrecht, The Netherlands. m.geerlings@umcutrecht.nl

OBJECTIVE To estimate the association of endogenous levels of bioavailable testosterone and estradiol with risk for cognitive decline and dementia in old men. METHODS Within the population-based, prospective Honolulu-Asia Aging Study, 2,974 men, aged 71 to 93 years, without dementia were reexamined 3 times over an average of 6 years for development of dementia and cognitive decline. Cognitive decline was measured with the Cognitive Abilities Screening Instrument. Incident dementia was diagnosed according to standard criteria. A total of 134 men experienced development of Alzheimer's disease (AD; including 40 cases with contributing cerebrovascular disease) and 44 experienced development of vascular dementia. RESULTS Adjusting for age and other covariates, testosterone was not associated with risk for dementia (using Cox regression analyses) or cognitive decline (using random coefficient analyses). However, higher levels of estradiol were associated with risk for AD (hazard ratio per standard deviation increase, 1.25; 95% confidence interval, 1.05-1.47) and AD with cerebrovascular disease (hazard ratio, 1.19; 95% confidence interval, 1.02-1.38). Also, compared with the lowest tertile of estradiol, men in the middle and highest tertile of estradiol had 0.24 and 0.28 points lower Cognitive Abilities Screening Instrument scores, respectively, for each year increase in age. CONCLUSIONS In old men, endogenous testosterone levels are not associated with risk for cognitive decline and AD, whereas higher estrogen levels increase risk for cognitive decline and AD.

UI MeSH Term Description Entries
D008137 Longitudinal Studies Studies in which variables relating to an individual or group of individuals are assessed over a period of time. Bogalusa Heart Study,California Teachers Study,Framingham Heart Study,Jackson Heart Study,Longitudinal Survey,Tuskegee Syphilis Study,Bogalusa Heart Studies,California Teachers Studies,Framingham Heart Studies,Heart Studies, Bogalusa,Heart Studies, Framingham,Heart Studies, Jackson,Heart Study, Bogalusa,Heart Study, Framingham,Heart Study, Jackson,Jackson Heart Studies,Longitudinal Study,Longitudinal Surveys,Studies, Bogalusa Heart,Studies, California Teachers,Studies, Jackson Heart,Studies, Longitudinal,Study, Bogalusa Heart,Study, California Teachers,Study, Longitudinal,Survey, Longitudinal,Surveys, Longitudinal,Syphilis Studies, Tuskegee,Syphilis Study, Tuskegee,Teachers Studies, California,Teachers Study, California,Tuskegee Syphilis Studies
D008297 Male Males
D009483 Neuropsychological Tests Tests designed to assess neurological function associated with certain behaviors. They are used in diagnosing brain dysfunction or damage and central nervous system disorders or injury. Aphasia Tests,Cognitive Test,Cognitive Testing,Cognitive Tests,Memory for Designs Test,Neuropsychological Testing,AX-CPT,Behavioral Assessment of Dysexecutive Syndrome,CANTAB,Cambridge Neuropsychological Test Automated Battery,Clock Test,Cognitive Function Scanner,Continuous Performance Task,Controlled Oral Word Association Test,Delis-Kaplan Executive Function System,Developmental Neuropsychological Assessment,Hooper Visual Organization Test,NEPSY,Neuropsychologic Tests,Neuropsychological Test,Paced Auditory Serial Addition Test,Repeatable Battery for the Assessment of Neuropsychological Status,Rey-Osterrieth Complex Figure,Symbol Digit Modalities Test,Test of Everyday Attention,Test, Neuropsychological,Tests, Neuropsychological,Tower of London Test,Neuropsychologic Test,Test, Cognitive,Testing, Cognitive,Testing, Neuropsychological,Tests, Cognitive
D012044 Regression Analysis Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable. Regression Diagnostics,Statistical Regression,Analysis, Regression,Analyses, Regression,Diagnostics, Regression,Regression Analyses,Regression, Statistical,Regressions, Statistical,Statistical Regressions
D003072 Cognition Disorders Disorders characterized by disturbances in mental processes related to learning, thinking, reasoning, and judgment. Overinclusion,Disorder, Cognition,Disorders, Cognition
D003704 Dementia An acquired organic mental disorder with loss of intellectual abilities of sufficient severity to interfere with social or occupational functioning. The dysfunction is multifaceted and involves memory, behavior, personality, judgment, attention, spatial relations, language, abstract thought, and other executive functions. The intellectual decline is usually progressive, and initially spares the level of consciousness. Senile Paranoid Dementia,Amentia,Familial Dementia,Amentias,Dementia, Familial,Dementias,Dementias, Familial,Dementias, Senile Paranoid,Familial Dementias,Paranoid Dementia, Senile,Paranoid Dementias, Senile,Senile Paranoid Dementias
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D000369 Aged, 80 and over Persons 80 years of age and older. Oldest Old

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