https://www.selleckchem.com/pr....oducts/4-Methylumbel
Two studies reported on reliability and validity of the IC scores. The main gaps in the construction and validation process were a) analysis undertaken with each domain separately rather than for the construct of intrinsic capacity, b) lack of a clear conceptual and operational definition of the vitality domain, c) summary score that depends upon the distribution of the study sample. Further validation of the intrinsic capacity concept is needed, together with more robust approaches to measure it. A standard index of