韓国の消防士におけるシフト勤務と神経認知機能との関連。予測的ビフォーアフター研究

Association between Shift Work and Neurocognitive Function among Firefighters in South Korea: A Prospective Before-After Study.

• Kyeongmin Kwak
• Bong-Kyu Kim
• Tae-Won Jang
• Chang Sun Sim
• Yeon-Soon Ahn
• Kyeong-Sook Choi
• Kyoung Sook Jeong

抄録

:最近の研究では、シフト勤務と神経認知機能との関連性が指摘されている。しかし、消防士のシフト勤務と神経認知機能との関連を検討した研究はまだ行われていない。本研究では、夜勤前後の神経認知機能を測定・比較することにより、交代勤務が消防士の神経認知機能に及ぼす影響を検討した。昼間の勤務中と夜勤明けの翌日に中枢神経系バイタルサイン(CNSVS)を用いた神経認知機能検査を実施した。夜間勤務前後の神経認知機能の違いを評価するためにペア検定を行った。また、不眠症とうつ病の神経認知機能を比較した。神経認知機能は、6領域（複合記憶、言語記憶、視覚記憶、複合注意、精神運動速度、運動速度）で有意に低下し、夜勤後翌日の神経認知指数も日中に比べて有意に低下した。これらの低下領域は、シフト勤務の種類にかかわらず、夜間勤務後も同様であった。

: Recent research indicates that shift work is associated with neurocognitive function. However, studies that examine the association between shift work and neurocognitive function in firefighters have not yet been performed. We examined the effect of shift work on neurocognitive function in firefighters by measuring and comparing neurocognitive function before and after night shift. : 352 firefighters from eight fire stations in South Korea were included in this study. We performed neurocognitive function test using central nervous system vital signs (CNSVS) during daytime work and on the next day after night work. We performed paired -tests to assess differences between neurocognitive function before and after night work. We also compared neurocognitive function in insomnia and depression. We used a general linear model to analyze the associations between shiftwork schedule and the changes in neurocognitive function. : The neurocognitive function significantly decreased in six domains (composite memory, verbal memory, visual memory, complex attention, psychomotor speed, and motor speed) as did the neurocognitive index on the next day after night work compared with during day work. These decreased domains were the same following night work regardless of the type of shift work. : Night work in firefighters may cause neurocognitive decline.