P076 Comparing Four Different Simulated Shiftwork Schedules on Higher order Cognitive Function

J Guzzetti, I Marando, M Owen, R Matthews, C Yates, S Banks
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Abstract

Abstract Introduction Changes in cognitive performance during shiftwork due to fatigue and circadian misalignment are well-documented. However experimental evaluations of shiftwork schedules are often limited to basic tasks such as vigilance and attention. The current study evaluated several higher order cognitive functions such as memory and task switching during four simulated shiftwork schedules. Methods N=27 completed a 10-day laboratory shiftwork simulation. They were randomly assigned to one of four shiftwork conditions: Condition A, 4h-on/4h-off/8h-on/8h-off schedule; Condition B, 6h-on/6h-off schedule; Conditions C and D represented to different sections of a 4h-on/4h-on call/4h-off/4h-on/4h-on call/4h-off schedule. The Automated Neuropsychological Assessment Metrics (ANAM) was used to assess cognitive function. The tasks included in this analysis were Code Substitution (CDS/CDD), Pursuit Tracking (PUR), Matching to Sample (M2S), and Switching Task (SWT). Stability of performance during waking was compared between the conditions using Kruskal-Wallis tests. Results The analysis of cognitive performance tasks yielded mixed findings. Performance on all tasks was ranked from best to worst: Condition D (>Conditions A, B, C; all p < .05), Condition A (>Conditions B, C; p < .05 and p <.001, respectively), Condition B, Condition C. Regarding stability of higher order cognitive function across the waking day, Condition A exhibited the worst stability, and was the only condition whereby performance degraded across the wake period. Discussion These findings highlight the variability in cognitive capacities during different shiftwork schedules. It is important to examine higher order cognitive function, and other cognitive abilities during shiftwork, when evaluating different shiftwork schedules.
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P076 .四种模拟轮班制对高阶认知功能的影响比较
由于疲劳和昼夜节律失调,轮班工作期间认知表现的变化有充分的证据。然而,轮班工作时间表的实验评估往往仅限于基本任务,如警惕和注意力。目前的研究评估了在四种模拟轮班工作安排下的一些高级认知功能,如记忆和任务切换。方法27例完成10天实验室倒班模拟。他们被随机分配到四种轮班工作条件中的一种:条件A, 4小时开/4小时关/8小时开/8小时关;条件B, 6h-on/6h-off时间表;条件C和D表示4h-on/4h-on call/4h-off/4h-on/4h-on call/4h-off时间表的不同部分。采用自动神经心理评估量表(ANAM)评估认知功能。该分析包括代码替换(CDS/CDD)、追踪跟踪(PUR)、样本匹配(M2S)和切换任务(SWT)。使用Kruskal-Wallis测试比较醒时性能的稳定性。结果对认知表现任务的分析得出了不同的结果。所有任务的表现从好到坏排列:条件D (>条件A, B, C;所有p <.05),条件A (>条件B, C;p, lt;.05和p <关于高阶认知功能在清醒期间的稳定性,条件A表现出最差的稳定性,并且是唯一在清醒期间表现下降的条件。这些发现强调了在不同的轮班时间表中认知能力的可变性。在评估不同的轮班时间表时,检查轮班期间的高阶认知功能和其他认知能力是很重要的。
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