Construction and validation of the 21 item fitness-to-drive screening measure short-form

Sherrilene Classen, Shabnam Medhizadah, Sergio Romero, Mi Jung Lee

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Introduction: The Fitness-to-Drive Screening Measure is a free online screening tool that detects at-risk older drivers, however, it's 20 min administration time may render the 54-item tool less than optimal for clinical use. Thus, this study constructed and validated a 21-item FTDS Short-Form (FTDS-SF). Method: This mixed methods study used 200 proxy rater responses and older driver on-road assessments. We conducted a Rasch analysis to examine information at the level of the item and used content validity index scores to select items. Using a receiver operator characteristics curve we determined the concurrent validity of the FTDS-SF to on-road outcomes. Results: Twenty-one items were selected for the FTDS-SF. The area under the curve = 0.72, indicated the FTDS-SF predicted on-road outcomes with acceptable accuracy. Still, 68 drivers were misclassified. Conclusion: The FTDS-SF may reduce administration time, while still yielding acceptable psychometric properties. Yet, caution needs to be executed in clinical decision making as the measure is overly specific.

Original languageEnglish (US)
Article number339
JournalFrontiers in Public Health
Issue numberDEC
StatePublished - Dec 6 2018
Externally publishedYes


  • Aging
  • Automobile driving
  • Decision support system
  • Fitness to drive
  • Proxy raters

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


Dive into the research topics of 'Construction and validation of the 21 item fitness-to-drive screening measure short-form'. Together they form a unique fingerprint.

Cite this