Reliability of the frailty index among community-dwelling older adults.
Erwin StolzHannes MayerlJudith GodinEmiel O HoogendijkOlga TheouWolfgang FreidlKenneth RockwoodPublished in: The journals of gerontology. Series A, Biological sciences and medical sciences (2023)
Both internal consistency and reliability of the FI were good, i.e. the FI differentiates well between community-dwelling older adults, which is an important requirement for risk stratification for both group-level oriented research and patient-level clinical purposes. Measurement error, however, was large, suggesting that individual health deteriorations or improvements, cannot be reliably detected for FI changes smaller than 0.13.