Klemera–Doubal Method
A statistical framework for combining age-related biomarkers.
AI-assisted editorial draft · Source check: 6 September 2026 · Independent reviewer: not yet assigned
What it measures
An estimate derived by combining relationships between selected biomarkers and chronological age.
Source 1: Mechanisms of Ageing and Development / Klemera & DoubalRequired inputs
An implementation-specific biomarker panel and coefficients from a reference population; some formulations also use chronological age.
How it was developed
Klemera and Doubal published the framework in 2006. It is a mathematical method, not one fixed commercial blood panel.
Source 1: Mechanisms of Ageing and Development / Klemera & DoubalOutcome associations
Outcome evidence depends on the chosen panel and implementation. The original methodological paper alone is not a complete outcome-validation review.
Source 1: Mechanisms of Ageing and Development / Klemera & DoubalLimitations
Scores change with the selected markers, reference sample and model specification. Two KDM implementations need not agree.
Can you calculate it yourself?
Possible only when the model parameters, measurements and units are available. A method name alone is insufficient.
Commercial use
No exact commercial implementation has been verified in this starter directory.
Source 1: Mechanisms of Ageing and Development / Klemera & DoubalSource 2: PLOS Medicine / Liu et al.Sources & verification
- A new approach to the concept and computation of biological age (2006)
Mechanisms of Ageing and Development / Klemera & Doubal · Accessed 2026-09-06
- A new aging measure captures morbidity and mortality risk (2018)
PLOS Medicine / Liu et al. · Accessed 2026-09-06