Normative performance on the executive clock drawing task in a multi-ethnic bilingual cohort: a project FRONTIER...

Area of Science:

• Neuropsychology
• Cognitive Aging Research
• Geriatric Assessment

Background:

• The executive Clock Drawing Test (CLOX) is crucial for dementia detection in older adults.
• Limited normative data and sociodemographic impact studies exist for the CLOX.
• This research provides normative CLOX data for diverse older adult populations.

Purpose of the Study:

• To establish normative data for the executive Clock Drawing Test (CLOX).
• To investigate the influence of sociodemographic factors on CLOX performance.
• To compare CLOX performance between Hispanic and non-Hispanic White older adults.

Main Methods:

• Utilized data from 445 cognitively healthy older adults in the FRONTIER study.
• Defined "normal" CLOX performance using domain-specific cognitive assessments.
• Employed hierarchical regression analyses to examine demographic predictors.

Main Results:

• CLOX1 scores necessitate age adjustments across all ethnicities.
• Education and gender significantly affected CLOX1 performance only in non-Hispanic Whites.
• No demographic variables predicted CLOX2 performance, indicating no need for adjustments.

Conclusions:

• Presents the first separate normative data for CLOX performance in Hispanic and non-Hispanic White samples.
• Introduces a novel method for defining "normal" cognitive function based on domain-specific criteria.
• Emphasizes the importance of examining sociodemographic impacts before applying normative corrections.