Table 1.

Studies selected for review pertaining to telomere length and its role as an aging biomarker.

Telomere Length
Study Title	BA Predictor Used	Cohort Name (If Applicable)	N	Results
Telomere length and all-cause mortality: A meta-analysis	Telomere length	Multiple cohorts	121,749	One standard deviation reduction of leukocytic telomere length corresponded to 13% increased all-cause mortality risk (95% confidence interval 7–19%) (Wang et al., 2018)
Longitudinal trajectories, correlations, and mortality associations of nine biological ages across 20-year follow-up	Telomere length, DNAm age (4 types), physiological age, cognitive function, functional aging index, and frailty index	Swedish population-based cohort	636	No evidence that telomere length associated with mortality risk (Li et al., 2020)
Leukocyte telomere length is not associated with mortality in older men	Telomere length	Prospective population-based MrOS-Sweden study	2744	Using Cox proportional hazards regression, tertile of LTL did not associate with all-cause mortality [tertile 1 (shortest) or 2 (middle) versus tertile 3 (longest); hazard ratio (HR) = 1.05, 95% confidence interval (CI) 0.85–1.28 and HR = 0.97, 95% CI 0.79–1.19, respectively] (Svensson et al., 2014)