Evidence map›Paper›PMID 9527139›Full record

ArticleJournal of neurology, neurosurgery, and psychiatry1998

A clinical role for 99mTc-HMPAO SPECT in the investigation of dementia?

P R Talbot, J J Lloyd, J S Snowden, D Neary, H J Testa

Abstract read
In one paragraph

Article in Journal of neurology, neurosurgery, and psychiatry, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from 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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Guideline
  2. Pooled it
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Neuroimaging in dementia.Seminars in neurology · 2008
    Review
  12. Article
  13. Article
  14. CT perfusion as a useful tool in the evaluation of leuko-araiosis.Biomedical imaging and intervention journal · 2006
    Article
  15. Article
  16. Article
  17. Brain SPET perfusion in early Alzheimer's disease: where to look?European journal of nuclear medicine and molecular imaging · 2002
    Article
  18. Diffuse Lewy Body Disease.Current treatment options in neurology · 2001
    Article
  19. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

P R TalbotDepartment of Neurology, Manchester Royal Infirmary, UK.
J J Lloyd
J S Snowden
D Neary
H J Testa

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo provide the clinician with a guide to the clinical utility of 99mTc-HMPAO single photon emission computed tomography (SPECT) and to the interpretation of specific test results in the differential diagnosis of dementia.

methodsThree hundred and sixty three patients with dementia were studied prospectively for a median three (range 1-6) years and classified into disease groups on the basis of established clinical criteria. The degree to which different patterns of cerebral blood flow (CBF) abnormality found on 99mTc-HMPAO SPECT imaging at the time of initial patient presentation modified clinical diagnoses was determined by calculating the likelihood ratios for pairwise disease group comparisons. The optimal clinical usage of 99mTc-HMPAO SPECT was determined by calculating the percentage of significant test results for each pairwise disease group comparison.

resultsBilateral posterior CBF abnormality was found to significantly increase the odds of a patient having Alzheimer's disease as opposed to vascular dementia or frontotemporal dementia. Bilateral anterior CBF abnormality significantly increased the odds of a patient having frontotemporal dementia as opposed to Alzheimer's disease, vascular dementia, or Lewy body disease. "Patchy" CBF changes significantly increased the odds of a patient having vascular dementia as opposed to Alzheimer's disease. Unilateral anterior, unilateral anterior plus unilateral posterior, and generalised CBF abnormality failed to contribute to the differentiation of any of these forms of dementia.

conclusions99mTc-HMPAO SPECT was found to be most useful in distinguishing Alzheimer's disease from vascular dementia and fronto temporal dementia, and least useful in differentiating between Alzheimer's disease and Lewy body disease, and between vascular dementia, frontotemporal dementia, and progressive aphasia. It is suggested that CBF SPECT should be used selectively and as an adjunct to clinical evaluation and CT.

Indexed as

Technetium Tc 99m ExametazimeTomography, Emission-Computed, Single-PhotonAgedAlzheimer DiseaseAphasia, Primary ProgressiveDementiaDementia, VascularDiagnosis, DifferentialFemaleHumansLikelihood FunctionsMaleMiddle AgedOdds RatioParkinson DiseaseProspective StudiesTechnetium Tc 99m Exametazime

Identifiers

PMID9527139
PMCPMC2169991

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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 OpenQuestion graph.