Driving Questionnaire for Dementia Patients [DDA-10]

Purpose of the Questionnaire

The Driving Questionnaire for Patients with Dementia (DDA-10) is primarily designed to assess the ability to drive safely in individuals with dementia. By evaluating cognitive functions such as memory, perception, and decision-making, as well as driving skills, this tool helps determine whether the patient can continue driving safely or if restrictions are necessary. It is intended for clinical psychologists, neurologists, and healthcare professionals working with dementia patients. It is based on research by O’Neill & Shiel (2005), Manoochehri & Shuaib (2007), and Ott et al. (2008).

Questionnaire Analysis

The questionnaire was developed by E. Tsantali (Department of Psychology, Aristotle University of Thessaloniki) and M. Tsolaki (3rd Neurological Clinic, Aristotle University of Thessaloniki). It consists of 10 questions covering five main domains: attention, spatial perception, memory, decision-making ability, and hazard recognition. Each subscale includes 2 questions, aiming to provide a comprehensive assessment of the skills required for safe driving.

Scoring of Questions

Each question is scored on a scale from 1 (not capable at all) to 5 (very capable). The total score is the sum of all questions, ranging from 10 to 50. Based on the total score, patients are classified into three categories: 10–25 (low driving ability, restriction required), 26–40 (moderate ability, monitoring recommended), and 41–50 (high ability, safe driving under conditions).

Statistical Analysis

The total score of the questionnaire ranges from 10 to 50, with higher scores indicating better driving ability. The subscales provide detailed information on specific domains, such as spatial perception or hazard recognition, allowing for an in-depth evaluation. For example, a low score in the memory subscale may indicate difficulties in recalling driving instructions or information.

Validity of the Questionnaire

The validity of the questionnaire is confirmed through comparison of its results with other established scales assessing cognitive and motor abilities, as well as through objective driving observations. Research has shown that the tool can accurately distinguish between patients who are safe to drive and those at risk.

Reliability of the Questionnaire

The reliability of the questionnaire is measured through internal consistency and the stability of results in repeated administrations. Studies have confirmed that patients’ responses remain consistent over time, making the tool reliable for clinical use.

References

Greek Literature:
Tsantali, E., & Tsolaki, M. (2023). Assessment of Driving Ability in Patients with Dementia. Thessaloniki: AUTH Publications.
International Literature:
Manoochehri, M., & Shuaib, A. (2007). Assessing Driving in Dementia Patients: A Comprehensive Review. Clinical Neurology and Neurosurgery.
O’Neill, D., & Shiel, A. (2005). Driving and Dementia: A Practical Guide for Clinicians. The British Journal of Psychiatry.
Ott, B. R., et al. (2008). The Relationship between Dementia and Driving Safety: A Review of the Literature. Journal of the American Geriatrics Society.