Clinicopathological concordance in cognitive disease diagnostics.

Area of Science:

• Neurology
• Pathology
• Geriatrics

Background:

• Neurocognitive disorders, including Alzheimer's disease (AD) and vascular dementia (VaD), present diagnostic challenges due to subtype variations.
• Previous studies showed a 49% concordance between clinical dementia diagnoses and pathological findings.

Purpose of the Study:

• To evaluate diagnostic concordance for dementia subtypes over a subsequent 10-year period (2007-2016).
• To compare current findings with a previous study (1996-2006) to assess changes in diagnostic accuracy.

Main Methods:

• Retrospective analysis of clinical records from 324 neuropathologically diagnosed dementia cases.
• Focus on specialist-diagnosed individuals (n=210) to assess clinical diagnosis accuracy against neuropathology.

Main Results:

• Overall diagnostic concordance improved to 61% in the 2007-2016 cohort.
• Significant variations observed between dementia subtypes, with vascular dementia (VaD) showing the lowest concordance at 31%.

Conclusions:

• Improved clinicopathological concordance highlights progress in dementia diagnosis but underscores persistent challenges.
• Vascular dementia (VaD) diagnosis remains difficult, necessitating further research for improved accuracy in cognitive disorder investigations.