The frailty syndrome is associated with adverse health outcomes in very old patients with stable heart failure: A prospective study in six Spanish hospitals

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

Corrigendum to: 2021 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure: Developed by the Task Force for the diagnosis and treatment of acute and chronic heart failure of the European Society of Cardiology (ESC) With the special contribution of the Heart Failure Association (HFA) of the ESC.

John G.F. Cleland, Andrew J.S. Coats, Ewa A. Jankowska et al. · PubMed · 2021 · 19.5K citations

Medicine, Cardiology, Internal Medicine +12

Assessment of Older People: Self-Maintaining and Instrumental Activities of Daily Living

M. P. Lawton, Elaine Brody · The Gerontologist · 1969 · 18.5K citations

Social Sciences, Psychology, Social Work +12

The Timed “Up & Go”: A Test of Basic Functional Mobility for Frail Elderly Persons

Diane Podsiadlo, Sandra Richardson · Journal of the American Geriatrics Society · 1991 · 14.3K citations

Medicine, Geriatric Medicine, Rehabilitation Medicine +17