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Japanese Occupational Therapy Research Volume 40, Issue 5 （October 2021）

作業療法 40巻5号（2021年10月発行）

Japanese English

◆原著論文

Visual Field with Inhibitory Tasks（VFIT）におけるカットオフ値の検討 Cut-off points in the Visual Field with Inhibitory Tasks (VFIT) test 伊賀博紀 ¹ , 澤田辰徳 ² , 藤田佳男 ³ , 内野まどか ¹ , 山崎彩音 ¹ Hiroki Iga ¹ , Tatsunori Sawada ² , Yoshio Fujita ³ , Madoka Utino ¹ , Ayane Yamazaki ¹ ¹IMSグループイムス板橋リハビリテーション病院 ²東京工科大学医療保健部リハビリテーション学科作業療法学専攻 ³千葉県立保健医療大学健康科学部リハビリテーション学科作業療法学専攻 ¹Department of Rehabilitation, IMS Itabashi Rehabilitation Hospital ²School of Health Sciences, Department of Occupational Therapy, Tokyo University of Technology ³Division of Occupational Therapy, Department of Rehabilitation Sciences, Faculty of Health Care Sciences, Chiba Prefectural University of Health Sciences キーワード：自動車運転 , 高次脳機能 , 有効視野 , Driving motor vehicle , Higher cognitive dysfunction , Useful field of view Keyword: 自動車運転 , 高次脳機能 , 有効視野 , Driving motor vehicle , Higher cognitive dysfunction , Useful field of view pp.616-624

発行日 2021年10月15日 Published Date 2021/10/15

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要旨：本研究の目的は脳損傷者の自動車運転評価の合否判断を元にVFITのカットオフ値を算出することである．対象は運転評価を受けた65歳以下の脳損傷患者104名であった．医療記録から検査結果及び最終判断結果（運転可/不可）を抽出し，VFITの各項目に対してReceiver Operating Characteristic曲線およびArea Under the Curveを求めた．その結果，Go/no go課題検査のカットオフ値は98%であった．二重課題検査の各Stageのカットオフ値はStageⅠはカットオフ値が60.5%，StageⅡは66.5%，StageⅢは64.5%，StageⅣは54.5%であった．VFITのカットオフ値は今後の自動車運転支援の一助となる可能性が示唆された．

　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.