Telomere Length among Chinese Aged 75+ Years.

Area of Science:

• Gerontology
• Molecular Biology
• Public Health

Background:

• Telomere length (TL) is a recognized biomarker of aging, often inversely associated with morbidity.
• Previous research primarily focused on younger populations, leaving the association in older adults less clear.
• Limited studies have investigated TL and its determinants in Chinese older adults.

Purpose of the Study:

• To examine telomere length (TL) in Chinese individuals aged 75 years and older.
• To identify factors associated with TL in this demographic.
• To determine the relationship between TL and multimorbidity, age-related diseases, frailty, and sarcopenia.

Main Methods:

• Cross-sectional study of 555 Chinese participants (mean age 83.6 years) from the Mr. and Ms. Osteoporosis cohort.
• TL measured using a molecular inversion probe-quantitative PCR assay (T/S ratio).
• Associations examined using adjusted binary logistic regressions.

Main Results:

• Males exhibited shorter TL (mean T/S ratio 0.97) compared to females (1.07) (p < 0.001).
• Lower education level correlated with longer TL (p = 0.016), while current smoking was linked to shorter TL (p = 0.007).
• No significant associations were found between TL and multimorbidity, specific age-related diseases, frailty, or sarcopenia.

Conclusions:

• In Chinese adults aged 75+, males have shorter telomere length (TL) than females.
• TL was not significantly associated with age-related diseases, frailty, or sarcopenia in this cohort.
• These findings suggest TL may not serve as a reliable biological marker of aging in older individuals.