Dementia and Neurocognitive Disorders (대한치매학회지)

Korean Dementia Association (대한치매학회)
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Development and Validation of a Screening Questionnaire for Dementia With Lewy Bodies (DLB): the DLB Screening Questionnaire (DLBSQ)

  • Mincheol Park (Department of Neurology, Yonsei University College of Medicine) ;
  • Kyoungwon Baik (Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine) ;
  • Young H. Sohn (Department of Neurology, Yonsei University College of Medicine) ;
  • Byoung Seok Ye (Department of Neurology, Yonsei University College of Medicine)
  • Received : 2023.11.08
  • Accepted : 2024.01.08
  • Published : 2024.01.31
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Abstract

Background and Purpose: Although dementia with Lewy bodies (DLB) is the second most common cause of neurodegenerative dementia, its clinical prevalence is low. We developed a short and easy-to-complete DLB screening questionnaire (DLBSQ) to raise diagnostic sensitivity in routine clinical settings. Methods: A total of 501 participants were retrospectively enrolled, including 71 controls, 184 patients without DLB, and 246 patients with probable DLB. All patients underwent clinical evaluation, including core features of DLB, the DLBSQ, brain magnetic resonance imaging, and detailed neuropsychological assessments. The diagnostic performance of the DLBSQ for probable DLB was investigated using a receiver operating characteristic curve analysis. Results: Total DLBSQ score was associated with visuospatial and frontal/executive dysfunction and the diagnosis of probable DLB. The area under the receiver operating characteristic curve for total DLBSQ score was 0.727. Youden's method revealed an optimal cutoff value of 3. The sensitivity and specificity of the DLBSQ were 68.7% and 62.4%, respectively. Its discriminating performance improved when cognitive test profiles were additionally considered (area under the curve: 0.822, sensitivity: 80.6%, and specificity: 70.4%). Conclusions: The DLBSQ might be a useful screening tool for DLB in routine clinical practice with good sensitivity and specificity.

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References

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