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biochemical marker

a variation in the chemical activity of an organism that accompanies a disorder, irrespective of whether it directly causes the disorder; an example is demonstrated in the dexamethasone suppression test. See also biological marker; clinical marker.

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Psychology term of the day

January 30th 2025

Katz Index of Activities of Daily Living

Katz Index of Activities of Daily Living

an observer-based measure of the functional status of older adults and individuals with chronic disorders. An individual is rated on the degree of assistance required to perform six basic functions: bathing, dressing, feeding, toileting, transferring, and continence. Baseline measurements provide useful feedback when compared to periodic or subsequent measurements. Also called Katz Index of Independence in Activities of Daily Living. [originally developed in 1963 by Sidney Katz (d. 2012), U.S. physician and geriatrician]