Late-Life Function & Disability Instrument™

Late-Life FDI

The Late-Life FDI™ is an outcome instrument developed specifically for community-dwelling older adults. The Late-Life FDI™ assesses and responds to meaningful change in two distinct outcomes: function–a person’s ability to do discrete actions or activities, and disability–a person’s performance of socially defined life tasks. There is a 16-item disability component and a 32-item function component.


The Late-Life FDI™ is used to assess clinical outcomes in programs designed for elderly individuals. It is also used in clinical research studies to examine the impact of treatment and pharmacological interventions that aim to improve function and minimize disability.


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Related Literature

Haley S, Jette A, Coster W, et al: Late-Life Function & Disability Instrument: I. Development and evaluation of the function component. Journal of Gerontology: Medical Sciences, 2002; 57A(4): M217-M222. Abstract

Haley SM, Jette AM, Coster WJ, Kooyoomjian JT, Levenson S, Heeren T, Ashba J. Late Life Function and Disability Instrument: II. Development and evaluation of the function component. J Gerontol A Biol Sci Med Sci. 2002 Apr;57(4):M217-22. Abstract

Jette AM, Haley SM, Ni P, Olarsch S, Moed R. Creating a computer adaptive test version of the Late-Life Function & Disability Instrument, J Gerontol A Biol Sci Med Sci. 2008 Nov;63(11):1246-56. Abstract

Sayers S, Jette A, Haley S, Heeren T, Guralnik J, Fielding R,. Validation of the Late-Life Function and Disability Instrument (LLFDI). Journal of the American Geriatrics Society. 2004; 52: 1-6.  Abstract