Delirium diagnosis methodology used in research: a survey-based study

Area of Science:

• Geriatric Medicine
• Neuroscience
• Clinical Research Methodology

Background:

• Delirium diagnosis in research relies on reference standards, but methodologies can vary.
• Evaluating delirium detection tools requires consistent and reliable diagnostic processes.

Purpose of the Study:

• To describe the methodologies used for delirium diagnosis in research studies that evaluate delirium detection tools.
• To identify variability in reference standard methods for delirium diagnosis in published research.

Main Methods:

• A survey was administered to authors of studies evaluating delirium detection instruments.
• The survey addressed rater characteristics, information sources, and diagnostic processes for delirium.
• Respondents were authors from 39 studies included in recent systematic reviews.

Main Results:

• 85% of eligible study authors responded; 79% of raters were physicians with a median of 7 years of experience.
• Inter-rater reliability was assessed in 70% of studies.
• Cognitive tests and delirium detection tools were used in 61% and 45% of studies, respectively; 27% used neither.

Conclusions:

• Significant variability exists in reference standard methods for delirium diagnosis in research.
• Standardization is needed, including documenting inter-rater reliability and using standardized tools.
• Incorporating expert consensus and utilizing all available patient information can improve delirium research consistency and generalizability.