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The concordance or discordance between epigenetic age and chronological age may be an indicator of future health. (A) Across a population, people can be categorized as epigenetically old, where their epigenetic age is higher than their chronological age, epigenetically young where the reverse is true, or concordant, where neither is true. (B) It is interesting to speculate whether these groups would show divergent trajectories of health as they age.
