Alzheimer’s Disease – Why We Need Early Diagnosis
Open accessAbstract
Alzheimer's disease is the leading cause of dementia. However, neither Alzheimer's disease nor Alzheimer's dementia are an inevitable consequence of aging. This review provides an overview of the issues involved in a diagnosis of Alzheimer's disease before an individual meets the criteria for Alzheimer's dementia. It examines how Alzheimer's disease diagnosis rates can be improved, the implications of an early diagnosis for the individual, carer and society, and the importance of risk reduction to prevent or delay progression. Although no disease-modifying agents capable of reversing the initial pathological changes are currently available, it may be possible to prevent or delay the development of dementia in a proportion of the population by modifying exposure to common risk factors. In other individuals, diagnosing the disease or risk of disease early is still valuable so that the individual and their carers have time to make choices and plan for the future, and to allow access to treatments that can help manage symptoms. Primary healthcare professionals play a pivotal role in recognising individuals at risk, recommending lifestyle changes in mid-adult life that can prevent or slow down the disease, and in timely diagnosis. Early intervention is the optimal strategy, because the patient's level of function is preserved for longer.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Pathological changes in the brain begin to accumulate many years before the appearance of clinical symptoms.
“pathological changes in the brain begin to accumulate many years before the appearance of clinical symptoms [12]”
From Theranostic Nanoplatforms for Alzheimer's Disease: A Critical Analysis of Conceptual Contradictions (2026) · cites this paper as [12]
The ‘Improving Alzheimer’s Disease Diagnosis Rates’ section says that people with preclinical Alzheimer’s disease can have signs of pathology despite having no cognitive symptoms. It does not establish that those pathological changes begin accumulating many years before clinical symptoms. Its reference to up to eight years concerns detection of mild cognitive impairment before dementia symptoms, not pathology before any clinical symptoms; page numbers are unavailable in our copy. (LLM, conf=0.86)
Experimental — accuracy not yet measured
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Cites
Kok, J. S., Berg, I. J., & Scherder, E. J. A. (2013) · Dementia and Geriatric Cognitive Disorders Extra · doi:10.1159/000353441 · Cited by 20,589 · see citing works
NIA‐AA Research Framework: Toward a biological definition of Alzheimer's disease
Jack, C. R., Bennett, D. A., Blennow, K., Carrillo, M. C., Dunn, B., Haeberlein, S. B., Holtzman, D. M., Jagust, W., Jessen, F., Karlawish, J., et al. (2018) · Alzheimer's & Dementia · doi:10.1016/j.jalz.2018.02.018 · Cited by 10,537 · see citing works
2018 Alzheimer's disease facts and figures
Alzheimer's Association (2018) · Alzheimer's & Dementia · doi:10.1016/j.jalz.2018.02.001 · Cited by 1,912 · see citing works
Mitchell, A. J., & Shiri‐Feshki, M. (2009) · Acta Psychiatrica Scandinavica · doi:10.1111/j.1600-0447.2008.01326.x · Cited by 1,659 · see citing works
Ahmadi-Abhari, S., Guzman-Castillo, M., Bandosz, P., Shipley, M. J., Muniz-Terrera, G., Singh-Manoux, A., Kivimäki, M., Steptoe, A., Capewell, S., O’Flaherty, M., et al. (2017) · BMJ · doi:10.1136/bmj.j2856 · Cited by 301 · see citing works
Flagged first, then by citations
Research works printed but not linked: 37
- [1]Burns A, Iliffe S. Alzheimer’s disease. BMJ. 2009; 338: b158. doi: 10.1136/bmj.b158 19196745 · DOI · Paper page
- [4]Brookmeyer R, Abdalla N, Kawas CH, Corrada MM. Forecasting the prevalence of preclinical and clinical Alzheimer’s disease in the United States. Alzheimers Dement. 2018; 14(2): 121– 129. doi: 10.1016/j.jalz.2017.10.009 29233480 PMC5803316 · DOI · Paper page
- [5]Matthews FE, Stephan BC, Robinson L, et al. Cognitive Function and Ageing Studies (CFAS) collaboration. A two decade dementia incidence comparison from the Cognitive Function and Ageing Studies I and II. Nat Commun. 2016; 7: 11398. doi: 10.1038/ncomms11398 27092707 PMC4838896 · DOI · Paper page
- [6]Sullivan KJ, Dodge HH, Hughes TF, et al. Declining incident dementia rates across four population-based birth cohorts. J Gerontol A Biol Sci Med Sci. 2018. doi: 10.1093/gerona/gly236. PMC6696712 30312371 · DOI
- [7]Norton S, Matthews FE, Barnes DE, Yaffe K, Brayne C. Potential for primary prevention of Alzheimer’s disease: an analysis of population-based data. Lancet Neurol. 2014; 13(8): 788– 794. doi: 10.1016/S1474-4422(14)70136-X 25030513 · DOI · Paper page
- [8]World Health Organization. Risk Reduction of Cognitive Decline and Dementia. WHO Guidelines. World Health Organization 2019. 31219687
- [9]Reisberg B, Ferris SH, de Leon MJ, Crook T. The global deterioration scale for assessment of primary degenerative dementia. Am J Psychiatr. 1982; 139: 1136– 1139. 7114305
- [10]Sperling RA, Aisen PS, Beckett LA, et al. Toward defining the preclinical stages of Alzheimer’s disease: recommendations from the National Institute on Aging-Alzheimer’s Association workgroups on diagnostic guidelines for Alzheimer’s disease. Alzheimers Dement. 2011; 7(3): 280– 292. doi: 10.1016/j.jalz.2011.03.003 21514248 PMC3220946 · DOI · Paper page
- [11]Bateman RJ, Aisen PS, De Strooper B, et al. Autosomal-dominant Alzheimer’s disease: a review and proposal for the prevention of Alzheimer’s disease. Alzheimers Res Ther. 2011; 3(1): 1. doi: 10.1186/alzrt59 21211070 PMC3109410 · DOI · Paper page
- [13]Saxton J, Lopez OL, Ratcliff G, et al. Preclinical Alzheimer disease. Neuropsychological test performance 1.5 to 8 years prior to onset. Neurology. 2004; 63: 2341– 2347. doi: 10.1212/01.WNL.0000147470.58328.50 15623697 · DOI · Paper page
- [15]NICE guideline [NG97]. Dementia: assessment, management and support for people living with dementia and their carers. 6 2018 Available from: https://www.nice.org.uk/guidance/ng97/chapter/Recommendations. Accessed 12 11, 2019. 30011160
- [16]Zanetti O, Geroldi C, Frisoni GB. Mild cognitive impairment (MCI) is not a clinical entity. BMJ. 2009; 338: b75. doi: 10.1136/bmj.b902 19196746 · DOI
- [18]Isaacson RS, Ganzer CA, Hristov H, et al. The clinical practice of risk reduction for Alzheimer’s disease: a precision medicine approach. Alzheimers Dement. 2018; 14(12): 1663– 1673. doi: 10.1016/j.jalz.2018.08.004 30446421 PMC6373477 · DOI
- [22]Barnes DE, Beiser AS, Lee A, et al. Development and validation of a brief dementia screening indicator for primary care. Alzheimers Dement. 2014; 10(6): 656– 665.e1. doi: 10.1016/j.jalz.2013.11.006 24491321 PMC4119094 · DOI
- [23]Cantegreil-Kallen I, Pin S. Fear of Alzheimer’s disease in the French population: impact of age and proximity to the disease. Int Psychogeriatr. 2012; 24(1): 108– 116. doi: 10.1017/S1041610211001529 21849100 · DOI
- [24]Karlawish J. Addressing the ethical, policy, and social challenges of preclinical Alzheimer disease. Neurology. 2011; 77(15): 1487– 1493. doi: 10.1212/WNL.0b013e318232ac1a 21917767 PMC4561233 · DOI
- [27]Black CM, Fillit H, Xie L, et al. Economic burden, mortality, and institutionalization in patients newly diagnosed with Alzheimer’s disease. J Alzheimers Dis. 2018; 61(1): 185– 193. doi: 10.3233/JAD-170518 29103033 · DOI
- [28]Turnbull Q, Wolf AM, Holroyd S. Attitudes of elderly subjects toward “truth telling” for the diagnosis of Alzheimer’s disease. J Geriatr Psychiatry Neurol. 2003; 16(2): 90– 93. doi: 10.1177/0891988703016002005 12801158 · DOI
- [29]Ouimet MA, Dendukuri N, Dion D, Beizile E, Elie M. Disclosure of Alzheimer’s disease. Senior citizens’ opinions. Can Fam Physician. 2004; 50: 1671– 1677. 15648383 PMC2214533
- [30]Robinson SM, Canavan M, O’Keeffe ST. Preferences of older people for early diagnosis and disclosure of Alzheimer’s disease (AD) before and after considering potential risks and benefits. Arch Gerontol Geriatr. 2014; 59(3): 607– 612. doi: 10.1016/j.archger.2014.07.010 25088061 · DOI
- [31]Wikler EM, Blendon RJ, Benson JM. Would you want to know? Public attitudes on early diagnostic testing for Alzheimer’s disease. Alzheimers Res Ther. 2013; 5(5): 43. doi: 10.1186/alzrt206 24010759 PMC3978817 · DOI
- [32]Sheffrin M, Stijacic Cenzer I, Steinman MA. Desire for predictive testing for Alzheimer’s disease and impact on advance care planning: a cross-sectional study. Alzheimers Res Ther. 2016; 8(1): 55. doi: 10.1186/s13195-016-0223-9 27955707 PMC5153917 · DOI
- [34]de Vugt ME, Verhey FR. The impact of early dementia diagnosis and intervention on informal caregivers. Prog Neurobiol. 2013; 110: 54– 62. doi: 10.1016/j.pneurobio.2013.04.005 23689068 · DOI
- [35]Mittelman MS, Ferris SH, Shulman E, Steinberg G, Levin B. A family intervention to delay nursing home placement of patients with Alzheimer disease. A randomized controlled trial. JAMA. 1996; 276(21): 1725– 1731. doi: 10.1001/jama.1996.03540210033030 8940320 · DOI
- [36]Wimo A, Mattsson B, Adolfsson R, Eriksson T, Nelvig A. Dementia day care and its effects on symptoms and institutionalization–a controlled Swedish study. Scand J Prim Health Care. 1993; 11(2): 117– 123. doi: 10.3109/02813439308994913 8356361 · DOI
- [37]Littlewood C, Seymour J, Owen V. Does treating Alzheimer’s disease early, delay institutionalisation? Int J Geriatr Psychiatry. 2010; 25(12): 1307– 1309. doi: 10.1002/gps.2446 21086542 · DOI
- [38]Bruandet A, Richard F, Bombois S, et al. Alzheimer disease with cerebrovascular disease and vascular dementia: clinical features and course compared with Alzheimer disease. J Neurol Neurosurg Psychiatry. 2009; 80: 133– 139. doi: 10.1136/jnnp.2007.137851 18977819 · DOI
- [40]Versijpt J. Effectiveness and cost-effectiveness of the pharmacological treatment of Alzheimer’s disease and vascular dementia. J Alzheimers Dis. 2014; 42(Suppl 3): S19– 25. doi: 10.3233/JAD-132639 25061049 · DOI
- [41]Foldes SS, Moriarty JP, Farseth PH, Mittelman MS, Long KH. Medicaid savings from the New York University caregiver intervention for families with dementia. Gerontologist. 2018; 58(2): e97– e106. doi: 10.1093/geront/gnx077 29106531 · DOI
- [42]Banerjee S, Wittenberg R. Clinical and cost effectiveness of services for early diagnosis and intervention in dementia. Int J Geriatr Psychiatry. 2009; 24: 748– 754. doi: 10.1002/gps.2191 19206079 · DOI
- [43]Weimer DL, Sager MA. Early identification and treatment of Alzheimer’s disease: social and fiscal outcomes. Alzheimers Dement. 2009; 5: 215– 226. doi: 10.1016/j.jalz.2009.01.028 19362885 PMC2785909 · DOI
- [44]Getsios D, Blume S, Ishak KJ, Maclaine G, Hernandez L. An economic evaluation of early assessment for Alzheimer’s disease in the United Kingdom. Alzheimers Dement. 2012; 8: 22– 30. doi: 10.1016/j.jalz.2010.07.001 21420366 · DOI · Paper page
- [45]Dubois B, Padovani A, Scheltens P, Rossi A, Dell’Agnello G. Timely diagnosis for Alzheimer’s disease: a literature review on benefits and challenges. J Alzheimers Dis. 2016; 49(3): 617– 631. doi: 10.3233/JAD-150692 26484931 PMC4927869 · DOI
- [47]Barnes DE, Yaffe K. The projected effect of risk factor reduction on Alzheimer’s disease prevalence. Lancet Neurol. 2011; 10(9): 819– 828. doi: 10.1016/S1474-4422(11)70072-2 21775213 PMC3647614 · DOI
- [48]Hampel H, Toschi N, Babiloni C, et al. Revolution of Alzheimer precision neurology: passageway of systems biology and neurophysiology. J Alzheimers Dis. 2018; 64(Suppl 1): S47– S105. 29562524 PMC6008221
- [49]Ritchie CW, Ritchie K. The PREVENT study: a prospective cohort study to identify mid-life biomarkers of late-onset Alzheimer’s disease. BMJ Open. 2012; 2: e001893. doi: 10.1136/bmjopen-2012-001893 PMC3533047 23166135 · DOI
- [50]Ritchie CW, Molinuevo JL, Truyen L, Satlin A, Van der Geyten S, Lovestone S, European Prevention of Alzheimer’s Dementia (EPAD) Consortium. Development of interventions for the secondary prevention of Alzheimer’s dementia: the European Prevention of Alzheimer’s Dementia (EPAD) project. Lancet Psychiatry. 2016; 3(2): 179– 186. doi: 10.1016/S2215-0366(15)00454-X 26683239 · DOI
Cited by
Sorted by citations
The Potential Role of Gut Microbiota in Alzheimer’s Disease: From Diagnosis to Treatment
Varesi, A., Pierella, E., Romeo, M., Piccini, G. B., Alfano, C., Bjørklund, G., Oppong, A., Ricevuti, G., Esposito, C., Chirumbolo, S., et al. (2022) · Nutrients · doi:10.3390/nu14030668 · Cited by 225 · see citing works
Tang, A. S., Rankin, K. P., Cerono, G., Miramontes, S., Mills, H., Roger, J., Zeng, B., Nelson, C., Soman, K., Woldemariam, S., et al. (2024) · Nature Aging · doi:10.1038/s43587-024-00573-8 · Cited by 86 · see citing works
A deep learning model for Alzheimer’s disease diagnosis based on patient clinical records
Ávila-Jiménez, J. L., Cantón-Habas, V., Carrera-González, M. D. P., Rich-Ruiz, M., & Ventura, S. (2024) · Computers in Biology and Medicine · doi:10.1016/j.compbiomed.2023.107814 · Cited by 50 · see citing works
Gao, X. R., Chiariglione, M., Qin, K., Nuytemans, K., Scharre, D. W., Li, Y.-J., & Martin, E. R. (2023) · Scientific Reports · doi:10.1038/s41598-023-27551-1 · Cited by 45 · see citing works
Advanced Overview of Biomarkers and Techniques for Early Diagnosis of Alzheimer’s Disease
Rani, S., Dhar, S. B., Khajuria, A., Gupta, D., Jaiswal, P. K., Singla, N., Kaur, M., Singh, G., & Barnwal, R. P. (2023) · Cellular and Molecular Neurobiology · doi:10.1007/s10571-023-01330-y · Cited by 48 · see citing works
Fitzgerald, G. S., Chuchta, T. G., & McNay, E. C. (2023) · CNS Neuroscience & Therapeutics · doi:10.1111/cns.14160 · Cited by 22 · see citing works
Paolillo, E. W., Casaletto, K. B., Clark, A. L., Taylor, J. C., Heuer, H. W., Wise, A. B., Dhanam, S., Sanderson-Cimino, M., Saloner, R., Kramer, J. H., et al. (2024) · JMIR Aging · doi:10.2196/52831 · Cited by 16 · see citing works
de Arriba-Pérez, F., & García-Méndez, S. (2025) · Arabian Journal for Science and Engineering · doi:10.1007/s13369-024-09508-2 · Cited by 8 · see citing works
Fitting Contralateral Neuroanatomical Asymmetry into the Amyloid Cascade Hypothesis
Arreola, F., Salazar, B., & Martinez, A. (2022) · Healthcare · doi:10.3390/healthcare10091643 · Cited by 3 · see citing works
Theranostic Nanoplatforms for Alzheimer's Disease: A Critical Analysis of Conceptual Contradictions
Zorkina, Y., Abramova, O., Zubkov, E., Gurina, O., & Ushakova, V. (2026) · International Journal of Molecular Sciences · doi:10.3390/ijms27083560 · Cited by 1 · see citing works
- Authors
- Rasmussen, J., & Langerman, H.
- Affiliations
- MSD (UK) Limited (United Kingdom) (GB)
- Corresponding author
- Rasmussen, Jill
- Venue
- Degenerative Neurological and Neuromuscular Disease
- Publisher
- Informa UK Limited
- Published
- 2019-12
- Volume
- Volume 9
- Pages
- 123-130
- ISSN
- 1179-9900 (ISSN-L)
- PMC
- PMC6935598
- OpenAlex
- W2995724321
- Cited by
- 501
- References
- 5
- Citations by year
- 2026: 72 · 2025: 94 · 2024: 138 · 2023: 95 · 2022: 63 · 2021: 27 · 2020: 12
- FWCI
- 20.32
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- Locations
- Degenerative Neurological and Neuromuscular Disease (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cancer-related cognitive impairment studies
- Keywords
- Alzheimer's disease, early diagnosis, dementia, risk factors, risk mitigation, disease-modifying therapy, primary care, caregivers, early intervention, lifestyle modification, symptom management
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review