ArticleLancet (London, England)2005
Global prevalence of dementia: a Delphi consensus study.
Article in Lancet (London, England), 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 9 registered trials, which are not on this map. Cited by 1,632 papers, 15 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Gut-Brain-axis: Targets for Improvement of Cognition in the Elderly
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Retina Microvascular Remodeling and Cognitive Function In Hypertension : Eyebrain
Ageing Gut Brain Interactions
Evaluation of the Effect of Cataract Surgery on Cognitive Function in Very Elderly Patients
Department of Psychiatry, Taichung Veterans General Hospital
Role of Volumetric Magnetic Resonance Imaging in Evaluation of Different Types of Dementia
ProCare4Life Pilot 3 Clinical Study: Investigating ProCare4Life Impact on Quality of Life of Elderly Subjects With Neurodegenerative Diseases
CONSTELLATIONS Living Lab: Development, Implementation and Evaluation of a Patient-oriented Quality Improvement Program Targeting Care Transitions of Older Adults Living with Major Neurocognitive Disorders and Their Caregivers.
Who cites it
1,632 citing papers in PubMed, 15 syntheses or guidelines pooled it.
- Epidemiological and economic burden of dementia in the Middle East and North African region.Journal of Alzheimer's disease : JAD · 2025Pooled it
- Relationship Between Cognitive Abilities and Lower-Limb Movements: Can Analyzing Gait Parameters and Movements Help Detect Dementia? A Systematic Review.Sensors (Basel, Switzerland) · 2025Pooled it
- Association between periodontal disease and Alzheimer's disease: umbrella review.Frontiers in dental medicine · 2025Pooled it
- Mitochondrial quality control in neurodegenerative diseases: from molecular mechanisms to natural product therapies.Frontiers in physiology · 2025Pooled it
- A Meta-Analysis of the Relationship between Stroke and Alzheimer's Disease: Therapeutic and Prognostic Implications.Kidney & blood pressure research · 2025Pooled it
- Emerging trends in cognitive impairment and dementia among older populations in Asia: A systematic review.Journal of global health · 2024Pooled it
- Arterial stiffness measured by pulse wave velocity correlated with cognitive decline in hypertensive individuals: a systematic review.BMC neurology · 2024Pooled it
- Pooled it
- Repetitive transcranial magnetic stimulation impacts the executive function of patients with vascular cognitive impairment: a systematic review and meta-analysis.Frontiers in neurology · 2024Pooled it
- Global trends in dementia care research in the context of COVID-19: bibliometric analysis.Frontiers in medicine · 2024Pooled it
- The effect of music therapy on cognitive functions in patients with Alzheimer's disease: a systematic review of randomized controlled trials.Alzheimer's research & therapy · 2023Pooled it
- Non-pharmacological interventions for sleep disturbances in people with dementia.The Cochrane database of systematic reviews · 2023Pooled it
- Herbal Therapeutics for Alzheimer's Disease: Ancient Indian Medicine System from the Modern Viewpoint.Current neuropharmacology · 2023Pooled it
- Tea intake or consumption and the risk of dementia: a meta-analysis of prospective cohort studies.PeerJ · 2023Pooled it
- Grey matter changes on brain MRI in subjective cognitive decline: a systematic review.Alzheimer's research & therapy · 2022Pooled it
- A peer mentoring program for Chinese American dementia caregivers: a pilot randomized controlled trial.Aging & mental health · 2024Trial
- The impact of empowerment theory-based health education on Alzheimer's disease informal caregivers: a randomized controlled trial.Frontiers in public health · 2024Trial
- Improving Sleep Quality, Daytime Sleepiness, and Cognitive Function in Patients with Dementia by Therapeutic Exercise and NESA Neuromodulation: A Multicenter Clinical Trial.International journal of environmental research and public health · 2023Trial
- Psychological and Contextual Factors of AI Acceptance Among Informal Caregivers of People Living With Dementia: Cross-Sectional Pilot Study.JMIR formative research · 2026Article
- Impact of pre-operative dementia or cognitive impairment on outcomes after elective primary total shoulder arthroplasty.Journal of shoulder and elbow arthroplasty · 2026Article
1,572 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
16 authors.
Funding
Abstract
background100 years after the first description, Alzheimer's disease is one of the most disabling and burdensome health conditions worldwide. We used the Delphi consensus method to determine dementia prevalence for each world region.
methods12 international experts were provided with a systematic review of published studies on dementia and were asked to provide prevalence estimates for every WHO world region, for men and women combined, in 5-year age bands from 60 to 84 years, and for those aged 85 years and older. UN population estimates and projections were used to estimate numbers of people with dementia in 2001, 2020, and 2040. We estimated incidence rates from prevalence, remission, and mortality.
findingsEvidence from well-planned, representative epidemiological surveys is scarce in many regions. We estimate that 24.3 million people have dementia today, with 4.6 million new cases of dementia every year (one new case every 7 seconds). The number of people affected will double every 20 years to 81.1 million by 2040. Most people with dementia live in developing countries (60% in 2001, rising to 71% by 2040). Rates of increase are not uniform; numbers in developed countries are forecast to increase by 100% between 2001 and 2040, but by more than 300% in India, China, and their south Asian and western Pacific neighbours.
interpretationWe believe that the detailed estimates in this paper constitute the best currently available basis for policymaking, planning, and allocation of health and welfare resources.
Indexed as
Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.