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The document lists FAST stages 1 through 7e (including 6a–6f) with characteristic functional changes, expected untreated duration, mental age estimates, and MMSE score ranges. It explains how to use FAST for differential diagnosis by checking whether changes progress in sequence, and how to measure treatment delay through the difference between actual and expected untreated duration across follow-up visits.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/functional-assessment-staging-test-fast-alzheimers-disease-staging-and-treatment-impact/504815/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/functional-assessment-staging-test-fast-alzheimers-disease-staging-and-treatment-impact/504815.png","ImageObject",300,407,{"name":92,"@type":93},"A glass of water","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-10-04",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the purpose of the Functional Assessment Staging Test (FAST)?","Question",{"text":112,"@type":113},"FAST is used to stage the course of Alzheimer’s disease based on functional changes and to support validated clinical assessment.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does FAST help differentiate Alzheimer’s disease progression from other causes?",{"text":117,"@type":113},"If changes are due to AD progression, FAST-related changes occur in sequence and do not skip stages; skipped patterns suggest a different or additional condition.",{"name":119,"@type":110,"acceptedAnswer":120},"How can FAST be used to measure whether treatment delays AD progression?",{"text":121,"@type":113},"Stage patients at each visit and use the longitudinal FAST view to compare actual time spent in a stage with the expected untreated duration; the gap indicates treatment delay.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},504815,1792667609,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24,"preview_page_count":4},962090760832,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Functional Assessment Staging Test  \nThe Functional Assessment Staging Test (FAST) is the most well validated measure of the course of AD in the published, scientific literature.  \nThe stages of Alzheimer’s disease as defined by FAST are:  \n\n| Stage | Stage Name | Characteristic | Expected Untreated AD Duration (months) | Mental Age (years) | MMSE (score) |\n| --- | --- | --- | --- | --- | --- |\n| 1 | Normal Aging | No deficits whatsoever | -- | Adult | 29-30 |\n| 2 | Possible Mild Cognitive Impairment | Subjective functional deficit | -- |  | 28-29 |\n| 3 | Mild Cognitive Impairment | Objective functional deficit interferes with a person's most complex tasks | 84 | 12+ | 24-28 |\n| 4 | Mild Dementia | IADLs become affected, such as bill paying, cooking, cleaning, traveling | 24 | 8-12 | 19-20 |\n| 5 | Moderate Dementia | Needs help selecting proper attire | 18 | 5-7 | 15 |\n| 6a | Moderately Severe Dementia | Needs help putting on clothes | 4.8 | 5 | 9 |\n| 6b | Moderately Severe Dementia | Needs help bathing | 4.8 | 4 | 8 |\n| 6c | Moderately Severe Dementia | Needs help toileting | 4.8 | 4 | 5 |\n| 6d | Moderately Severe Dementia | Urinary incontinence | 3.6 | 3-4 | 3 |\n| 6e | Moderately Severe Dementia | Fecal incontinence | 9.6 | 2-3 | 1 |\n| 7a | Severe Dementia | Speaks 5-6 words during day | 12 | 1.25 | 0 |\n| 7b | Severe Dementia | Speaks only 1 word clearly | 18 | 1 | 0 |\n| 7c | Severe Dementia | Can no longer walk | 12 | 1 | 0 |\n| 7d | Severe Dementia | Can no longer sit up | 12 | 0.5-0.8 | 0 |\n| 7e | Severe Dementia | Can no longer smile | 18 | 0.2-0.4 | 0 |\n\n 7f   Severe Dementia   Can no longer hold up head    12+   0-0.2   0   \nA simple to use, electronic version of FAST is included in  \nMedical Care Corporation’s system.  \nMedical Care Corporation  \nSimple and Accurate Memory Assessment [www.mccare.com](www.mccare.com) • (888)565-5535  \nFunctional Assessment Staging Test  \nDifferential Diagnosis  \nUse the FAST tool to determine if changes in a patient’s condition are due to Alzheimer’s disease or another condition. If the change is due to AD progression, then any changes on the FAST scale will be in sequence—AD-related changes do not skip FAST stages.  \nExample: a patient is mildly demented (FAST stage 4), and loses the ability to bathe (FAST 6b) but can still pick out their clothes (FAST 5) and dress themselves (FAST 6a), then they skipped FAST stages 5 and 6a and went directly to FAST stage 6b. These changes are not due to AD progression. It could be that the diagnosis of AD is wrong or that the patient has a second dementing disorder in addition to AD. Alternatively, the patient may have an exacerbation of an existing medical problem, developed a new medical problem, or had some other change in their care or living situation that caused the difficulty bathing.  \nMeasurement of delay in AD  \nUse the FAST tool at each office visit to measure treatment effect in each patient. The longitudinal view of the FAST shows how long a patient has spent in each FAST stage, plus its average expected untreated duration. The difference, which appears in the column,“Actual minus Expected Untreated AD Duration”, indicates whether treatment has delayed AD progression.  \nExample: you have been treating an AD patient for four years and staging them at each office visit. The FAST longitudinal view shows that the patient has spent 46 months in stage 4 (e.g. , difficulty managing finances) . The average, expected untreated duration of stage 4 is 24 months, and the difference shown is 22 months. This indicates that treatment has delayed AD progression by approximately 22 months. Without treatment, they would have progressed to FAST stage 6b and would be unable to dress or bathe.  \nReferences  \nAuer S, Reisberg B. The GDS/FAST staging system. Int Psychogeriatr 9 Suppl 1: 167-71, 1997.  \nAuer SR, Sclan SG, Yaffee RA, Reisberg B. The neglected half of Alzheimer disease: cognitive and functional concomitants of  \nsevere dementia. J Am Geriatr Soc ","cbCaieOe2LMjgOMd","https://ap.wps.com/l/cbCaieOe2LMjgOMd","pdf",84220,"English","# Functional Assessment Staging Test (FAST)\n## FAST stages and characteristic functional changes\n## Differential diagnosis using FAST\n## Measuring delay in AD progression\n## References","[{\"question\":\"What is the purpose of the Functional Assessment Staging Test (FAST)?\",\"answer\":\"FAST is used to stage the course of Alzheimer’s disease based on functional changes and to support validated clinical assessment.\"},{\"question\":\"How does FAST help differentiate Alzheimer’s disease progression from other causes?\",\"answer\":\"If changes are due to AD progression, FAST-related changes occur in sequence and do not skip stages; skipped patterns suggest a different or additional condition.\"},{\"question\":\"How can FAST be used to measure whether treatment delays AD progression?\",\"answer\":\"Stage patients at each visit and use the longitudinal FAST view to compare actual time spent in a stage with the expected untreated duration; the gap indicates treatment delay.\"}]","Functional Assessment Staging Test (FAST) - Alzheimer’s disease staging and treatment impact | PDF",1791075993]