Missed and Delayed Diagnosis of Dementia in Primary Care: Prevalence and Contributing Factors

Bradford, Andrea; Kunik, Mark E.; Schulz, Paul; Williams, Susan P.; Singh, Hardeep

doi:10.1097/wad.0b013e3181a6bebc

Cited by 969Dementia and Cognitive Impairment ResearchClinical Reasoning and Diagnostic SkillsPrimary Care and Health Outcomes

Missed and Delayed Diagnosis of Dementia in Primary Care: Prevalence and Contributing Factors

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Bradford, Andrea, Kunik, Mark E., Schulz, Paul, Williams, Susan P., Singh, Hardeep·2009·Alzheimer Disease & Associated Disorders

DOI 10.1097/wad.0b013e3181a6bebcPMC PMC2787842

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Abstract

Dementia is a growing public health problem for which early detection may be beneficial. Currently, the diagnosis of dementia in primary care is dependent mostly on clinical suspicion on the basis of patient symptoms or caregivers' concerns and is prone to be missed or delayed. We conducted a systematic review of the literature to ascertain the prevalence and contributing factors for missed and delayed dementia diagnoses in primary care. Prevalence of missed and delayed diagnosis was estimated by abstracting quantitative data from studies of diagnostic sensitivity among primary care providers. Possible predictors and contributory factors were determined from the text of quantitative and qualitative studies of patient, caregiver, provider, and system-related barriers. Overall estimates of diagnostic sensitivity varied among studies and seemed to be in part a function of dementia severity, degree of patient impairment, dementia subtype, and frequency of patient-provider contact. Major contributory factors included problems with attitudes and patient-provider communication, educational deficits, and system resource constraints. The true prevalence of missed and delayed diagnoses of dementia is unknown but seems to be high. Until the case for dementia screening becomes more compelling, efforts to promote timely detection should focus on removing barriers to diagnosis.

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In primary care, more than half of dementia diagnoses are delayed until moderate or advanced stages.
“more than 50% of dementia diagnoses are delayed until moderate or advanced stages in primary care,4,5”
From Review of Artificial Intelligence for Clinical Use in Alzheimer's Disease and Related Dementias (2026) · cites this paper as [4]
The Results (Prevalence of missed diagnosis of dementia; page unavailable) show that primary-care diagnostic sensitivity was lowest for mild dementia, consistent with delayed recognition. But the reported sensitivities vary across studies, and the Discussion says no study definitively established the prevalence of missed or delayed diagnosis. The paper does not establish that more than 50% of diagnoses occur only at moderate or advanced stages. (LLM, conf=0.86)
Experimental — accuracy not yet measured
Studies have found that diagnosis is delayed until moderate or advanced stages in 50% or more patients with Alzheimer's.
“studies have found that diagnosis is delayed until moderate or advanced stages in 50% or more patients with Alzheimer's, 707 , 708”
From 2024 Alzheimer's disease facts and figures (2024) · cites this paper as [708]
The Results section (page unavailable) reports that primary-care providers detected mild dementia less reliably than severe dementia, supporting concern about delayed diagnosis. But diagnostic sensitivity is not the proportion of patients first diagnosed at a given stage; the paper does not establish that 50% or more of patients with Alzheimer’s are diagnosed only at moderate or advanced stages. The Discussion (page unavailable) says no studies definitively determined the prevalence of missed or delayed dementia diagnosis. (LLM, conf=0.86)
Experimental — accuracy not yet measured
Lack of confidence of healthcare providers about their knowledge of dementia and healthy ageing has previously been reported.
“The lack of confidence of healthcare providers about their knowledge of dementia and healthy ageing has previously been reported. 15,16”
From Awareness of dementia risk reduction among current and future healthcare professionals: A survey study (2021) · cites this paper as [15]
Previous studies have shown that general practitioners (GPs) only sporadically provide advice on preventive strategies for dementia.
“Nevertheless, previous studies have shown that general practitioners (GPs) only sporadically provide advice on preventive strategies for dementia, which could be explained by the concerns about their knowledge regarding this topic.15-17”
From Awareness of dementia risk reduction among current and future healthcare professionals: A survey study (2021) · cites this paper as [15]
The Results section on provider factors discusses gaps in physicians’ dementia-care knowledge, and the Discussion addresses missed diagnoses and difficulty discussing early symptoms. Neither reports how often GPs advise patients on dementia prevention. Searches for preventive advice, prevention counseling, and risk reduction found no passage addressing that practice; page numbers were not available in our copy. (LLM, conf=0.74)
Experimental — accuracy not yet measured

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2011 Alzheimer's disease facts and figures
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The Alzheimer's Association appropriate use recommendations for blood biomarkers in Alzheimer's disease
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Alzheimer's Association recommendations for operationalizing the detection of cognitive impairment during the Medicare Annual Wellness Visit in a primary care setting
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Timely Diagnosis for Alzheimer’s Disease: A Literature Review on Benefits and Challenges
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Association of Incident Dementia With Hospitalizations
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Blood biomarkers for Alzheimer’s disease in clinical practice and trials
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2025 Alzheimer's disease facts and figures
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World Alzheimer Report 2011 : The benefits of early diagnosis and intervention
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Mild Cognitive Impairment
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Systematic Review of miRNA as Biomarkers in Alzheimer’s Disease
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Unmet Needs of Community‐Residing Persons with Dementia and Their Informal Caregivers: Findings from the Maximizing Independence at Home Study
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“A range of provider, patient, caregiver, and health system factors that hinder early detection of dementia has been identified, many of which are amenable to interventions.(40) Early diagnosis provides opportunities to initiate treatments for dementia symptoms and for individuals and families to plan for future care.”
Background
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Clinical recognition of dementia and cognitive impairment in primary care: a meta-analysis of physician accuracy
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Neuroinflammation: A Potential Risk for Dementia
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Longitudinal analysis of dementia diagnosis and specialty care among racially diverse Medicare beneficiaries
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Proton Pump Inhibitors and Risk of Mild Cognitive Impairment and Dementia
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Primary Care Physicians’ Perceived Barriers to Optimal Dementia Care: A Systematic Review
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Validation of Claims Algorithms to Identify Alzheimer’s Disease and Related Dementias
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Spurious Inferences about Long-Term Outcomes: The Case of Severe Sepsis and Geriatric Conditions
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Developing Measures of Cognitive Impairment in the Real World from Consumer-Grade Multimodal Sensor Streams
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The accuracy of family physicians' dementia diagnoses at different stages of dementia: a systematic review
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Present Algorithms and Future Treatments for Alzheimer’s Disease
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Time from diagnosis to institutionalization and death in people with dementia
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The Burdens of Survivorship: An Approach to Thinking about Long-Term Outcomes after Critical Illness
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Clinical Use and Utility of Amyloid Imaging
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Development and Validation of eRADAR: A Tool Using EHR Data to Detect Unrecognized Dementia
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Lewy body dementia: the impact on patients and caregivers
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Self-citation
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Misidentification of Dementia in Medicare Claims and Related Costs
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Coronary Artery Calcium and Risk of Dementia in MESA (Multi-Ethnic Study of Atherosclerosis)
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Authors: Bradford, A., Kunik, M. E., Schulz, P., Williams, S. P., & Singh, H.
Affiliations: Baylor College of Medicine (US)
Michael E. DeBakey VA Medical Center (US)
Corresponding author: Bradford, Andrea
ORCID: Bradford, Andrea
Kunik, Mark E.
Schulz, Paul
Singh, Hardeep
Venue: Alzheimer Disease & Associated Disorders
Publisher: Ovid Technologies (Wolters Kluwer Health)
Published: 2009-10
Volume: 23
Issue: 4
Pages: 306-314
ISSN: 0893-0341 (ISSN-L)
DOI: 10.1097/wad.0b013e3181a6bebc
PMC: PMC2787842
OpenAlex: W2055531721
Cited by: 969
References: 76
Citations by year: 2026: 69 · 2025: 101 · 2024: 108 · 2023: 83 · 2022: 116 · 2021: 74 · 2020: 73 · 2019: 65 · 2018: 64 · 2017: 41 · 2016: 39 · 2015: 36 · 2014: 20 · 2013: 25 · 2012: 30
FWCI: 2.31
Type: journal article
Language: en
Open access: green
www.ncbi.nlm.nih.gov
Locations: Alzheimer Disease & Associated Disorders (publishedVersion)
PubMed (publishedVersion)
PubMed Central (acceptedVersion)
Funders: National Cancer Institute (K23CA125585)
Topics: Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Health Sciences › Medicine › Family Practice › Clinical Reasoning and Diagnostic Skills
Health Sciences › Health Professions › General Health Professions › Primary Care and Health Outcomes
Keywords: dementia, missed diagnosis, delayed diagnosis, primary care, diagnostic sensitivity, dementia screening, barriers to diagnosis, patient-provider communication, caregiver concerns, dementia severity, dementia subtypes, educational deficit
MeSH terms: Dementia, Diagnostic Errors, Humans, Primary Health Care, Risk Factors, Prevalence, Delayed Diagnosis

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Missed and Delayed Diagnosis of Dementia in Primary Care: Prevalence and Contributing Factors

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