Screening for frailty in elderly emergency department patients by using the Identification of Seniors At Risk (ISAR)

A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation

Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al. · Journal of Chronic Diseases · 1987 · 49.9K citations

Public Health, Biostatistics, Clinical Classification Systems +15

Frailty in Older Adults: Evidence for a Phenotype

Linda P. Fried, Catherine M. Tangen, Jeremy Walston et al. · The Journals of Gerontology Series A · 2001 · 24.5K citations · Full text

Medicine, Geriatric Medicine, Frailty +16

STUDIES OF ILLNESS IN THE AGED. THE INDEX OF ADL: A STANDARDIZED MEASURE OF BIOLOGICAL AND PSYCHOSOCIAL FUNCTION.

Sidney Katz · PubMed · 1963 · 12.2K citations

Education, Rehabilitation Medicine, Aging +16

A Short Portable Mental Status Questionnaire for the Assessment of Organic Brain Deficit in Elderly Patients†

Eric Pfeiffer · Journal of the American Geriatrics Society · 1975 · 5.4K citations

Medicine, Geriatric Medicine, Psychiatry +14

Rehospitalizations among Patients in the Medicare Fee-for-Service Program

Stephen F. Jencks, Mark V. Williams, Eric A. Coleman · New England Journal of Medicine · 2009 · 5.2K citations

Public Affairs, Health Services Administration, Internal Medicine +12