Clinical Manifestations.

Area of Science:

• Neurology
• Geriatrics
• Psychiatry

Background:

• The Clinical Dementia Rating (CDR) and Hindi Mental State Examination (HMSE) are widely used in India to assess cognitive impairment.
• CDR evaluates six cognitive domains, while HMSE is a 31-point test for the Indian population.
• This study investigated diagnostic concordance between CDR, HMSE, and expert clinical evaluation (CE).

Purpose of the Study:

• To assess the diagnostic agreement between the Clinical Dementia Rating (CDR), Hindi Mental State Examination (HMSE), and expert clinical evaluation (CE).
• To establish the reliability of CDR and HMSE as tools for classifying cognitive impairment in the Indian context.

Main Methods:

• Data from 85 participants were analyzed, with CE by expert Geriatric Psychiatrists serving as the gold standard.
• The Clinical Dementia Rating (CDR) and Hindi Mental State Examination (HMSE) were administered by trained research fellows.
• Agreement was assessed using Fleiss' multi-rater kappa and Cohen's weighted kappa.

Main Results:

• Overall agreement among CDR, HMSE, and CE was moderate (Fleiss kappa = 0.556).
• Agreement between CE and CDR was "very good" (weighted kappa = 0.954), while agreement between CE and HMSE was "moderate" (weighted kappa = 0.483).
• Agreement between HMSE and CDR was also "moderate" (weighted kappa = 0.482).

Conclusions:

• The study highlights excellent concordance between CDR-derived diagnoses and gold-standard CE-based diagnoses.
• CDR is a reliable tool for classifying cognitive impairment, particularly in the context of the "brain age gap" in India.
• HMSE also demonstrates moderate agreement, suggesting its utility in cognitive assessment.