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Simplifying Complex Figure scoring: Data from the Emory Healthy Brain Study and initial clinical validation.

David W Loring^1,2, Najé Simama¹, Katherine Sanders¹

¹Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA.

Journal of the International Neuropsychological Society : JINS

|November 14, 2024

Summary

The Emory 10-element Complex Figure (CF) scoring system is highly correlated with the Osterrieth approach, significantly reducing scoring time and improving detection of memory decline in deep brain stimulation (DBS) candidates.

Keywords:

Assessment Deep brain stimulation Inter-rater reliability Recognition memory Visual construction Visual memory

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Area of Science:

Neuropsychology
Cognitive Assessment
Neurological Disorders

Background:

The Complex Figure (CF) test is a key tool for assessing visuospatial constructional abilities and memory.
Traditional scoring methods, like the Osterrieth system, can be time-consuming.
Developing efficient and sensitive scoring methods is crucial for clinical research and practice.

Purpose of the Study:

Introduce the Emory 10-element Complex Figure (CF) scoring system and recognition task.
Evaluate the correlation between Emory CF scoring and traditional Osterrieth scoring in healthy volunteers and deep brain stimulation (DBS) candidates.
Assess the efficiency and sensitivity of the Emory CF scoring system in a clinical population.

Main Methods:

The study included 315 healthy volunteers (Emory Healthy Brain Study) and 84 DBS candidates.
Scoring time differences were analyzed in 48 DBS candidates.
Correlations and group classification were assessed using statistical analyses, including logistic regression.

Main Results:

High correlations were found between Emory CF and Osterrieth scoring for non-recognition components in both cohorts.
Emory CF scoring was significantly faster, saving an average of 57% of scoring time.
Emory CF scoring showed greater sensitivity to memory decline in DBS candidates and improved group classification.

Conclusions:

The Emory 10-element CF scoring system demonstrates high correlation with the Osterrieth method.
It offers significant time savings and enhanced sensitivity for detecting memory deficits.
The Emory CF scoring system is suitable for broader clinical research implementation.