A pilot study: Can the UFOV assessment be used as a repeated measure to determine timing of on-road assessment in stroke?

Abstract

Useful Field of View scores are predictive of on-road performance post-stroke. No objective data exist to determine if the Useful Field of View (UFOV) assessment can be used as a repeated measure in the post-stroke population to determine timing of occupational therapy on-road assessment as recovery occurs. The aims of this study were to determine whether there is a practice effect if the UFOV is administered at one, two and three months' post-stroke and to assess optimal time post-stroke to refer to an on-road assessment. Forty-two participants, 17 men (40.5%), with a mean age of 71years (SD 9.33) were randomly allocated to 1. Assessment group - UFOV at one, two and three months' post-stroke, 2. Control group-UFOV at three months' post-stroke. Parametric and non-parametric tests were utilised depending on data distribution. No significance was found between; three months' subtest 1 (P=0.463), three months' subtest 2 (P=0.729) and three months' subtest 3 (P=0.534) between the assessment and control groups. Both group's scores were combined to examine pass/fail rates of UFOV assessment to indicate timing of referral to on-road assessments. At one month, 16.9% stroke survivors passed the UFOV, when reassessed at three months 69.1% passed and 28.6% again failed. Improvements in scores at one month intervals over three months are due to improvements in abilities assessed by the UFOV as no practice effect was found to influence scores. UFOV scores performed at monthly intervals post-stroke can be used to guide the timing of an occupational therapy on-road assessment, with an increased likelihood of passing, as recovery occurs. This repeated use of the UFOV assessment can assist referral practices that best utilise driving rehabilitation programmes. Larger studies need to be conducted to confirm these results.