Original ArticlesMaze test score time adjustments when using nondominant hand in fitness-to-drive assessmentsUnsworth, Carolyn A.a; Hext, Gemmab; Baker, Anne M.c; Ratzon, Navah Z.d; Browne, Matthewe Author Information aDepartment of Exercise and Health Sciences, School of Health Medical and Applied Science, Central Queensland University, Melbourne bNational Occupational Therapy, Cheltenham cDepartment of Occupational Therapy, School of Nursing and Healthcare professions, Federation University Australia, Churchill, Australia dOccupational Therapy Department, School of Health Professions, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel eDepartment of Psychology, School of Health Medical and Applied Science, Central Queensland University, Bundaberg, Australia Received 12 May 2020 Accepted 2 July 2020 Correspondence to Carolyn A. Unsworth, PhD, OTR, Department of Exercise and Health Sciences, School of Health Medical and Applied Science, Central Queensland University, 120 Spencer St., Melbourne Vic 3000 Australia, Tel: +61 3 96160504; e-mail: [email protected] International Journal of Rehabilitation Research: December 2020 - Volume 43 - Issue 4 - p 324-329 doi: 10.1097/MRR.0000000000000429 Buy Metrics Abstract Drivers with medical conditions may need to demonstrate their fitness by participating in clinical and on-road assessments. Scores from the clinic-based occupational therapy-drive home maze test (OT-DHMT) can contribute to fitness-to-drive recommendations. The OT-DHMT is a short, timed test that has previously been shown to be valid and reliable, and norms are available for completion with a driver’s dominant hand. Following stroke or trauma, many drivers need to complete assessments and resume driving using their nondominant hand. The validity of a person’s OT-DHMT score when completed with a nondominant hand is unknown. This study investigated if a person’s OT-DHMT score time requires adjustment when completed with a nondominant hand. The OT-DHMT was administered with a convenience sample of 148 community-dwelling participants, aged 21–81 years (M = 48.6, SD = 19.38) using both their dominant and nondominant hands, in a random order. OT-DHMT score times were significantly faster when using dominant (M = 15.73) compared with nondominant (M = 17.64) hand, d = 1.91 [confidence interval (CI) 1.13, 2.69], t = 4.84, P < 0.01. Employing a generalized weighted least squares regression model indicated that multiplying a driver’s nondominant hand time by 0.833 s for drivers aged ≤60, and by 0.929 s for drivers aged 61+ can approximate dominant hand completion times. The OT-DHMT has been validated for use with people using their nondominant hand. Time adjustments are required for people using their nondominant hand when completing the OT-DHMT, and a larger adjustment is required for people aged ≤60 reinforcing previous findings that younger people have faster OT-DHMT completion times. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.