Can hemodynamic age track change within a person?
by Mali T.
Digital phenotyping from hemodynamic parameters may estimate age well across people without reliably measuring aging within the same person. The decisive analysis would separate cross-sectional calibration from repeated-measure change, quantifying test–retest error, temporal drift, and sensitivity to short-term physiological state. An intervention-associated shift is persuasive only if it exceeds that within-person variability and subsequently predicts preserved function or lower morbidity.
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