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Factorial Validity and Reliability of the Executive Function-Related Toothbrushing Behavior Questionnaire Among
Asuka Ishiguro-Matsumoto1, Satoko Shibata1, Roxana Stegaroiu1
1Department of Oral Health and Welfare, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.
International Journal of Dental Hygiene
|April 12, 2026
Summary
The Executive Function-related Toothbrushing Behaviour Questionnaire (EF-TB) is a valid tool for assessing toothbrushing in individuals with intellectual disability (ID). This helps in developing strategies to improve their oral health behaviors.
Area of Science:
- Oral Health
- Neuroscience
- Behavioral Science
Background:
- Individuals with intellectual disability (ID) often face challenges with toothbrushing due to executive function (EF) deficits.
- Effective assessment tools are needed to understand and improve oral hygiene practices in this population.
Purpose of the Study:
- To evaluate the validity and reliability of the Executive Function-related Toothbrushing Behaviour Questionnaire (EF-TB).
- To assess EF-related toothbrushing behaviors in adults with ID.
Main Methods:
- The EF-TB was administered to 92 participants with ID and 70 controls.
- Family members/guardians and facility staff completed the EF-TB and Dysexecutive Questionnaire (DEX).
- Factor structure, internal consistency, discriminant, and concurrent validity were analyzed.
Main Results:
- Exploratory factor analysis identified three factors: 'Systematic implementation', 'Sustained implementation', and 'Start and Finish'.
- The EF-TB demonstrated good internal consistency reliability and satisfactory discriminant validity.
- Acceptable concurrent validity was found through significant correlation with the DEX.
Conclusions:
- The EF-TB is a valid and reliable instrument for assessing EF-related toothbrushing behaviors in individuals with ID.
- EF-TB scores provide valuable insights for interventions aimed at enhancing oral health in this demographic.

