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Dementia diagnostics in primary care : with a focus on cognitive testing
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- Segernäs Kvitting, Anna, 1977- (författare)
- Linköpings universitet,Avdelningen för samhällsmedicin,Medicinska fakulteten
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- Marcusson, Jan, Professor, 1958- (preses)
- Linköpings universitet,Avdelningen för neuro- och inflammationsvetenskap,Medicinska fakulteten,Region Östergötland, Medicinska och geriatriska akutkliniken
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- Foldevi, Mats, Docent, 1952- (preses)
- Linköpings universitet,Avdelningen för samhällsmedicin,Medicinska fakulteten
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- ISBN 9789176850374
- Linköping : Linköping University Electronic Press, 2019
- Engelska 80 s.
- Serie: Linköping University Medical Dissertations, 0345-0082 ; 1691
- Doktorsavhandling (övrigt vetenskapligt/konstnärligt)
Abstract
Ämnesord
Stäng
- BackgroundAge is the greatest risk factor for developing dementia and the total number of people aged 60 years and above is expected to more than double globally from 2013 to 2050 (1). Primary health care (PHC) is important for basic diagnostic evaluations. Objective test measurements have been shown to be more reliable than a patient's subjective memory complaints in dementia assessments (2). However, several studies indicate the low use of objective cognitive screening tools in dementia diagnostics in PHC (3). Some general practitioners (GPs) do not perceive today’s cognitive instruments as helpful in the diagnostic process and administration problems have been reported in PHC (4, 5).The overall aim of this thesis was to investigate the accuracy of several cognitive tests used in dementia assessments in PHC, especially among older patients: A Quick Test of Cognitive Speed (AQT), Cognistat and Cognitive Assessment Battery (CAB). The normative values of the Mini Mental Status Examination (MMSE) in the oldest old was also studied.MethodsThe studies included in this thesis are from two different study populations.Studies I, II and IV. Patients with and without cognitive symptoms were recruited from four primary health care centres in Sweden between 2007 and 2009.Study III. The Elderly in Linköping Screening Assessment (ELSA 85) cohort-population examined people born in 1922 in the municipality of Linköping, Sweden.ResultsStudy I. Results showed that AQT is a usable test for dementia diagnosis in PHC. Sensitivity for AQT is superior to the Clock Drawing Test (CDT), equivalent to MMSE and the combination MMSE and CDT. The AUC for AQT was 0.773, valued good enough.Study II. Overall, the results for Cognistat in this study are superior to MMSE and CDT, also in combination. Cognistat is promising for improved dementia diagnosis in PHC with a quick and easily administered multi-domain test for dementia assessments.Study III. This study presents valuable information about normative MMSE data for the oldest patients. Results, suggest using the 25th percentile in MMSE of 25 to 26 points, and indicate that MMSE 26 is as a reasonable cut-off for cognitive decline and further medical evaluation in older persons aged from 85 to 93 years.Study IV. In summary, the additive value of the CAB test in dementia investigations in PHC is not obvious. In addition to questionable accuracy, the test is quite time consuming and normative values are scarce. By introducing the numerical sum (CABsum) the accuracy was increased.ConclusionIn conclusion, objective cognitive tests are an important part of dementia diagnosis in PHC and there is a need for improved instruments and norm-values. From our results, several cognitive quick tests are usable in PHC - MMSE, AQT and Cognistat - but they have some disadvantages. MMSE 26 is a reasonable cut-off for cognitive decline in the oldest patients 85 to 93 years from a well-educated population with quite good socioeconomic. There is a great interest in finding short and better multi-domain instruments but the additive value of CAB in dementia investigations in PHC is questionable.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Allmänmedicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- General Practice (hsv//eng)
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