Association between telomere length, specific causes of death, and years of healthy life in health, aging, and body composition, a population-based cohort study.
Although telomere length (TL) is known to play a critical role in cellular senescence, the relationship of TL to aging and longevity in humans is not well understood. In a large biracial population-based cohort, we tested the hypotheses that elderly persons with shorter TL in peripheral white blood cells have poorer survival, shorter life span, and fewer years of healthy life (YHL). Associations were evaluated using Cox proportional hazard models and linear regression analyses where appropriate. TL (in kilo base pairs) was not associated with overall survival (hazard ratio 1.0; 95% confidence interval 0.9-1.1) or death from any specific underlying cause including infectious diseases, cancer, or cardiac and cerebrovascular diseases. TL, however, was positively associated with more YHL (beta = 0.08 +/- 0.04, p = .03). Findings suggest that TL may not be a strong biomarker of survival in older individuals, but it may be an informative biomarker of healthy aging.
Njajou
Omer T
OT
Departments of Medicine and Institute for Human Genetics, 513 Parnassus Street, HSE 672, University of California, San Francisco, San Francisco, CA 94143-0794, USA.
Hsueh
Wen-Chi
WC
Blackburn
Elizabeth H
EH
Newman
Anne B
AB
Wu
Shih-Hsuan
SH
Li
Rongling
R
Simonsick
Eleanor M
EM
Harris
Tamara M
TM
Cummings
Steve R
SR
Cawthon
Richard M
RM
D000368:Aged; D000375:Aging; D001823:Body Composition; D002423:Cause of Death; D015331:Cohort Studies; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D016615:Telomere