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Longitudinal study of basal cortisol levels in healthy elderly subjects: evidence for subgroups.

Abstract：

:A group of 51 healthy elderly volunteer subjects participated in a 3- to 6-year longitudinal study of basal cortisol levels. Once per year basal cortisol levels were examined using hourly sampling over a 24-h period. Analyses of three cortisol measures (last measure obtained, mean cortisol levels across years, and the cortisol slope) revealed that the slope of the regression line measuring cortisol levels at each year was the most predictive measure of cortisol secretion over the years in this elderly population. Cortisol levels were shown to increase with years in one subgroup, to decrease in another, and to remain stable in a third. The age of the subjects was not related to either cortisol levels or to the pattern of change in cortisol secretion over years. Free and total cortisol levels were highly correlated and the groups did not differ with regard to plasma corticosteroid binding globulin. No group differences were observed for weight, height, body mass index, pulse, blood pressure and glucose. However, significant group differences were reported for plasma triglycerides levels as well as high density lipoproteins levels. Positive correlations were reported between the obsession/compulsion subscale of the SCL-90 questionnaire and the cortisol slope of subjects. Finally, previously reported group differences in neuropsychological performance are summarized. Thus, there exists considerable variation in hypothalamo-pituitary-adrenal function amongst aged humans. These results are consistent with recent animal studies showing the existence of subpopulations of aged rats which differ in hypothalamo-pituitary-adrenal activity and cognitive efficiency.

journal_name

Neurobiol Aging

journal_title

Neurobiology of aging

authors

Lupien S,Lecours AR,Schwartz G,Sharma S,Hauger RL,Meaney MJ,Nair NP

doi

10.1016/0197-4580(95)02005-5

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

95-105

issue

1

eissn

0197-4580

issn

1558-1497

pii

0197458095020055

journal_volume

17

pub_type

杂志文章

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