Documentation and evaluation of cognitive impairment in elderly primary care patients

Topic: Risk, prevention and care in population studies

Objective To describe the prevalence of cognitive impairment among elderly primary care patients and to compare diagnostic evaluations and use of health services among patients with and those without cognitive impairment. Design Prospective cohort study. Setting Academic primary care group practice. Patients 3954 patients aged 60 years and older who completed the Short Portable Mental Status Questionnaire during routine office visits. Measurements Demographics and comorbid illness at baseline, diagnostic evaluations for cognitive impairment, use of standard and preventive health services, use of psychoactive drugs, and death in the year after the screening date. Results The prevalence of cognitive impairment among all patients aged 60 years and older at baseline was 15.7%; 10.5% had mild impairment and 5.2% had moderate to severe impairment. Patients with moderate to severe impairment were significantly older than patients with no impairment (76.2 years and 67.4 years, respectively), were more likely to be black (85.8% and 61.3%), had fewer years of education (7.3 years and 9.2 years), and were more likely to have cerebrovascular disease (20.4% and 6.3%) and evidence of undernutrition (30.6% and 16.9%). Dementia was recorded as a diagnosis for less than 25% of patients with moderate to severe cognitive impairment, but patients with documented impairment were more likely to have been evaluated for reversible causes. In the year after screening, patients with moderate to severe impairment were more likely than those with no impairment both to be hospitalized (29.1% and 16.5%) and to visit the emergency department (55.8% and 38.5%) but had fewer outpatient visits (6.0 and 7.6) and greater mortality (8.2% and 2.8%). Conclusions Cognitive impairment is associated with increased use of health services and increased mortality. Patients with undocumented cognitive impairment were significantly less likely to be evaluated for reversible causes. Research is needed to determine if better documentation of cognitive impairment would improve not only diagnostic evaluations but also patient management, counseling, and outcomes.

Key findings

• Results The prevalence of cognitive impairment among all patients aged 60 years and older at baseline was 15.7%; 10.5% had mild impairment and 5.2% had moderate to severe impairment.
• Patients with moderate to severe impairment were significantly older than patients with no impairment (76.2 years and 67.4 years, respectively), were more likely to be black (85.8% and 61.3%), had fewer years of education (7.3 years and 9.2 years), and were more likely to have cerebrovascular disease (20.4% and 6.3%) and evidence of undernutrition (30.6% and 16.9%).
• Conclusions Cognitive impairment is associated with increased use of health services and increased mortality.
• Patients with undocumented cognitive impairment were significantly less likely to be evaluated for reversible causes.

Why it matters

In one academic primary care practice, 15.7% of 3,954 patients aged 60+ screened positive for cognitive impairment, yet dementia was recorded for fewer than 25% of those with moderate to severe impairment. Patients whose impairment went unrecorded were significantly less likely to be checked for reversible causes. In the following year, the moderate–severe group had more hospital stays (29.1% vs 16.5%) and higher mortality (8.2% vs 2.8%), but the authors describe these as associations and say it is still untested whether better documentation would improve outcomes.

New to this subject? Start with our plain-English guide: Getting a diagnosis →

Study details

• Study designcohort study
• Participants3,954
• Effect size15.7%; 10.5%; 5.2%
• Evidence strengthModerate

Read the original

• DOI: 10.7326/0003-4819-122-6-199503150-00004
• PubMed: 7856990
• Original source →

May need a subscription OpenAlex found no free copy of the full text (checked 6 Feb 1020), so the publisher may charge for it. The PubMed abstract is free.

@article{callahan1995-7856990,
  author  = {Callahan, C. M. and Hendrie, H. C. and Tierney, W. M.},
  title   = {{Documentation and evaluation of cognitive impairment in elderly primary care patients}},
  journal = {Annals of internal medicine},
  year    = {1995},
  doi     = {10.7326/0003-4819-122-6-199503150-00004},
  pmid    = {7856990},
  url     = {https://doi.org/10.7326/0003-4819-122-6-199503150-00004}
}

Later studies that cite this one

24 studies in the alzhub library list this one in their references. Showing the 8 highest-scoring.

• Risks and Benefits of Screening for Dementia in Primary Care: The Indiana University Cognitive Health Outcomes Investigation of the Comparative Effectiveness of Dementia Screening (IU CHOICE)Trial Journal of the American Geriatrics Society · 2019-12-02 · usefulness score 68/100 · Treatments
• Prevalence and determinants of undetected dementia in the community: a systematic literature review and a meta-analysis BMJ open · 2017-02-03 · usefulness score 68/100 · Getting a diagnosis
• Missed and delayed diagnosis of dementia in primary care: prevalence and contributing factors Alzheimer disease and associated disorders · 2009-10-01 · usefulness score 67/100 · Getting a diagnosis
• Effectiveness of collaborative care for older adults with Alzheimer disease in primary care: a randomized controlled trial JAMA · 2006-05-01 · usefulness score 66/100 · Treatments
• Role of genes and environments for explaining Alzheimer disease Archives of general psychiatry · 2006-02-01 · usefulness score 64/100 · How common it is
• Four sensitive screening tools to detect cognitive dysfunction in geriatric emergency department patients: brief Alzheimer's Screen, Short Blessed Test, Ottawa 3DY, and the caregiver-completed AD8 Academic emergency medicine : official journal of the Society for Academic Emergency Medicine · 2011-04-01 · usefulness score 61/100 · Cognitive tests and assessment
• Screening for dementia in primary care: a summary of the evidence for the U.S. Preventive Services Task Force Annals of internal medicine · 2003-06-01 · usefulness score 58/100 · Treatments
• Development and validation of a brief dementia screening indicator for primary care Alzheimer's & dementia : the journal of the Alzheimer's Association · 2014-02-01 · usefulness score 57/100 · Long-term cohort studies

Related studies in Getting a diagnosis

• Alzheimer's Association clinical practice guideline for the Diagnostic Evaluation, Testing, Counseling, and Disclosure of Suspected Alzheimer's Disease and Related Disorders (DETeCD-ADRD): Executive summary of recommendations for primary care Alzheimer's & Dementia · 2024-12-23 · usefulness score 70/100
• Alzheimer's Association recommendations for operationalizing the detection of cognitive impairment during the Medicare Annual Wellness Visit in a primary care setting Alzheimer's & dementia : the journal of the Alzheimer's Association · 2012-12-20 · usefulness score 54/100
• Validation of a 6 item cognitive impairment test with a view to primary care usage International journal of geriatric psychiatry · 1999-11-01 · usefulness score 41/100
• Feasibility and Acceptability of Implementing a Digital Cognitive Assessment for Alzheimer Disease and Related Dementias in Primary Care The Annals of Family Medicine · 2025-04-29 · usefulness score 52/100
• Agile Implementation of a Digital Cognitive Assessment for Dementia in Primary Care The Annals of Family Medicine · 2025-04-29 · usefulness score 45/100
• Provider, Interdisciplinary Staff, and Patient Perspectives on the Potential for Cognitive Assessment and Care Plan Services in Primary Care Journal of Primary Care & Community Health · 2025-07-01 · usefulness score 36/100

Also tagged “assessment”

840 studies in the library carry the topic tag “assessment”; these are this study's neighbours in a fixed, alphabetical-by-hash tour of them, not the closest in content. All 840 tagged studies.

• Mild cognitive impairment: prevalence, prognosis, aetiology, and treatment The Lancet. Neurology · 2003-01-01 · usefulness score 52/100 · How common it is
• Predicting rates of cognitive and functional decline in Alzheimer’s disease and mild cognitive impairment Communications Medicine · 2026-02-26 · usefulness score 39/100 · Mild cognitive impairment
• Subjective memory complaints and awareness of memory functioning in mild cognitive impairment: a systematic review Dementia and geriatric cognitive disorders · 2009-08-13 · usefulness score 51/100 · Mild cognitive impairment

Similar studies

• Implementing early detection of cognitive impairment in primary care to improve care for older adults 2025 · Caregiving
• Improving identification of cognitive impairment in primary care 2006 · Disparities
• Physician recognition of cognitive impairment: evaluating the need for improvement 2004 · Vascular contributions
• Screening for cognitive impairment: comparing the performance of four instruments in primary care 2012 · Disparities
• The meaning of cognitive impairment in the elderly 1985 · How common it is
• Screening for the Spectrum of Cognitive Impairment in Primary Care: Development of a Machine Learning Informed, Workflow‐Friendly Care Model 2024 · Health systems and care delivery

More on Getting a diagnosis

• A review that covers this ground Mini-Mental State Examination (MMSE) for the detection of dementia in clinically unevaluated people aged 65 and over in community and primary care populations The Cochrane database of systematic reviews · 2016-01-13 · usefulness score 76/100
• Newest in this subject The Contribution of Routinely Collected Clinical Data to Dementia Identification in Primary Care: A Cross-Sectional Study Research Square · 2026-10-28 · Preprint — not yet peer-reviewed · usefulness score 16/100
• Newest in this subject Beyond “Denial”: Understanding and Responding to Help-Refusal in Dementia Preprints.org · 2026-10-26 · Preprint — not yet peer-reviewed · usefulness score 16/100

See all studies in Getting a diagnosis →