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	Global Deterioration Scale	Telefonintervju för kognitiv status
Ämnesområde	Social Gerontology	Gerontologi
Familj	Latent structure	Process / pipeline
Ursprungsår	1982	1988
Upphovsperson	Barry Reisberg, Steven H. Ferris, Mony J. de Leon, and Thomas Crook	J.C. Breitner
Typ	Ordinal clinical staging scale for cognitive decline	Telephone-administered cognitive interview
Ursprungskälla	Reisberg, B., Ferris, S. H., de Leon, M. J., & Crook, T. (1982). The Global Deterioration Scale for assessment of primary degenerative dementia. American Journal of Psychiatry, 139(9), 1136-1139.	Breitner, J. C., Folstein, M. F., & Murphy, E. A. (1989). Familial aggregation in Alzheimer dementia: comparison of risk estimates. Genet Epidemiol, 6(1), 35-45.
Alias	Reisberg GDS, GDS Staging Scale, Reisberg Stages, Seven-Stage Dementia Staging	TICS, TICS-m, Modified Telephone Interview for Cognitive Status
Närliggande	3	5
Sammanfattning	The Global Deterioration Scale (GDS) is a seven-stage clinical staging instrument that locates an older adult along the continuum of cognitive decline, from no impairment through very severe dementia. Introduced by Barry Reisberg and colleagues in 1982, it was designed to give clinicians and researchers a shared, ordinally graded vocabulary for the natural history of primary degenerative dementia, most prominently Alzheimer's disease. Rather than producing a numeric test score, the GDS asks the assessor to match a patient's cognitive, functional, and behavioral picture — gathered through clinical interview and informant report — to one of seven prototypical stage descriptions. Stages 1 to 3 cover the spectrum from normal cognition through subjective and then mild objective decline, stage 4 marks the threshold of clinically diagnosable dementia, and stages 5 to 7 trace the progression through moderate, moderately severe, and severe disease toward total dependence. Because the stages are ordered and clinically anchored, the GDS supports tracking decline over time, communicating prognosis, and stratifying patients in trials and care planning. It remains one of the most widely used global staging tools in gerontology and is often paired with the companion FAST and BCRS instruments from the same group.	The Telephone Interview for Cognitive Status (TICS) is a telephone-administered cognitive screening instrument developed by Breitner and colleagues in the late 1980s and modified (TICS-m) to assess cognitive function in older adults via remote interview. Designed for epidemiological studies and clinical research where in-person assessment is impractical or resource-intensive, the TICS combines questions assessing orientation, attention, language, memory, and reasoning in a format suitable for administration by trained interviewers without specialized clinical equipment. It has become widely used in longitudinal cohort studies, clinical trials, and telemedicine settings for cognitive screening and monitoring.