Predictive Validity of the WAIS-Ⅲ as a Driving Skill in Individuals with Brain Injury

Keishiro IWAI; Ryo OKUMA; Hitoshi TAKAHASHI; Shu WATANABE; Masahiro ABO

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Predictive Validity of the WAIS-Ⅲ as a Driving Skill in Individuals with Brain Injury

VernacularTitle:脳損傷者の自動車運転能力評価におけるWAIS-Ⅲの予測妥当性の検証
Author: Keishiro IWAI ¹ ; Ryo OKUMA ¹ ; Hitoshi TAKAHASHI ¹ ; Shu WATANABE ¹ ; Masahiro ABO ²
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1. Department of Rehabilitation, The Jikei Daisan Hospital
2. Department of Rehabilitation Medicine, The Jikei University School of Medicine
Keywords: brain injury; driving; neuropsychological testing
From:The Japanese Journal of Rehabilitation Medicine 2022;59(7):732-741
CountryJapan
Language:Japanese
Abstract: Objective：We aimed to examine the clinical validity of the Wechsler Adult Intelligence Scale (WAIS)-III for resuming automobile driving in patients with brain injury.Methods：A total of 71 patients who requested to resume driving after brain injuries were included, with 43 and 28 patients categorized in the resumed and non-resumed driving groups, respectively. Statistical analysis was performed by comparing the sub-items of the WAIS-III between the groups. The reference value of accurate determinants was estimated using receiver operating characteristic (ROC) curve analysis.Results：The results of the ROC curve analysis showed that the areas under the curves for full-scale intelligence quotient (FIQ), performance IQ (PIQ), and perceptual organization index (POI) were higher than 0.7 (with moderate predictive accuracy). The cutoff values were as follows with high specificity and low sensitivity：PIQ, 98.5；FIQ, 107；and PO, 107.Conclusion：The cutoff values of the FIQ, PIQ, and POI of the WAIS-III were inadequate predictors for resumption of driving in patients with brain injury. However, if patients had all three scores less than 70, it was suggested that they refrain from driving.