Cut-off points in the Visual Field with Inhibitory Tasks (VFIT) test

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  • Iga Hiroki
    Department of Rehabilitation, IMS Itabashi Rehabilitation Hospital
  • Sawada Tatsunori
    Major of Occupational Therapy, Department of Rehabilitation, School of Health Sciences, Tokyo University of Technology
  • Fujita Yoshio
    Division of Occupational Therapy, Department of Rehabilitation Sciences, Faculty of Health Care Sciences, Chiba Prefectural University of Health Sciences
  • Utino Madoka
    Department of Rehabilitation, IMS Itabashi Rehabilitation Hospital
  • Yamazaki Ayane
    Department of Rehabilitation, IMS Itabashi Rehabilitation Hospital

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Other Title
  • Visual Field with Inhibitory Tasks（VFIT）におけるカットオフ値の検討
  • Visual Field with Inhibitory Tasks (VFIT)ニ オケル カットオフチ ノ ケントウ

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Abstract

The purpose of this study was to calculate the cut-off point of the visual field with inhibitory tasks (VFIT) test, which is based on pass/fail judgment of car driving evaluations among brain injury survivors. The subjects were 104 brain injury patients under 65 who underwent driving evaluations. Using medical records, the test and pass/fail results were extracted retrospectively. For each VFIT test item, the receiver-operating characteristic curve and area under the curve were obtained. As a result, the cut-off point of the go/no-go task was 98% with a sensitivity of 68.7% and a specificity of 85.7%. The cut-off point of dual-task Stage I was 60.5% with a sensitivity of 92.8% and a specificity of 47.6%. The cut-off point of Stage II was 66.5% with a sensitivity of 78.3% and a specificity of 66.7%. The cut-off point of Stage III was 64.5% with a sensitivity of 80.7% and a specificity of 61.9%. The cut-off point of Stage IV was 54.5% with a sensitivity of 90.4% and a specificity of 47.6%. These results indicate that the cut-off point of the VFIT test may be helpful in future driving occupational therapy.

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