脳損傷者のドライビングシミュレーターによる評価と運転再開可否判定の関係性—運転再開可否判定の予測に向けた基準値の検討

Relationship between the evaluation of driving simulators and the judgment of resumption of driving for brain injured persons: Examination of standard value for judging the possibility of restarting operation

要旨：本研究の目的は，自動車運転再開可否判定とドライビングシミュレーター（以下，DS）による結果との関連性を検討することである．経験に基づいた判定だけでなく，より客観的なデータに基づいた評価を実施するために，後方視的にDSと運転再開可否判定の結果から基準値の算出を試みた．対象は，脳損傷後に当院を受診した運転再開希望者50名（運転再開群27名，運転非再開群23名）であった．DSの下位検査項目について群間比較を実施しカットオフ値を検討した．カットオフ値が算出されたのは誤反応合計，発進停止合計，全般合計，判定得点合計であった．3つ以上カットオフ値を上回った症例は，非再開と判定される精度が78％であることが明らかになった．

　The purpose of this research is to investigate the relevance of the driving resumability judgment and the results of the driving simulator (DS) and to clarify to what degree the DS evaluation results are used. The subjects were 50 responders who requested to resume driving after brain injuries (27 resumed driving groups, 23 non-resuming groups). Statistical analysis was performed by comparing the sub-items of the DS with each other between the groups, examining the performance and cutoff values. The cut-off values were calculated as the total number of false reactions, total stop-start, overall total, and total judgment scores. In the cases where the cutoff values were 3 or more, the accuracy of judgement of non-resuming subjects was 78%; it became clear that there was a high probability that subjects would be judged as non-resuming.