Work hours

工作时间
  • 文章类型: Journal Article
    背景:疗养院工作人员在实现令人满意的工作与生活平衡方面经常面临挑战,特别是因为轮班工作的性质。虽然长时间轮班会延长下班时间,在疗养院的背景下,它们对工作和休闲之间微妙平衡的影响仍未得到充分研究。这项研究调查了挪威养老院工作人员长期工作12-14小时的经验,以及他们对家庭生活与工作之间平衡的看法。
    方法:按照半结构化的定性方法对18名养老院工作人员进行了访谈。参与者在三种类型的长期轮班中工作,并提供了对他们经验的见解,解决工作时间等问题,移位模式,工作与家庭的平衡。
    结果:该研究揭示了四个主要类别:(1)长时间轮班对家庭生活的影响-高点和低点;(2)长时间轮班最大化休假时间;(3)长时间轮班减轻工作压力;(4)全职工作导致可预测的工作时间和稳定的收入。参与者强调了长时间轮班期间工作和休闲之间的明显分离,承认工作期间有限的社会生活,但赞赏延长的时间。家庭生活带来挑战,尤其是对年幼的孩子,但是参与者发现,在休假期间,家庭时间更长的时间会有好处。更长的休息时间和减少的通勤时间被认为是长时间轮班的优势,有助于更好的睡眠,减少压力和整体福祉。长时间轮班还允许更可预测的工作时间和收入,支持稳定的工作与生活平衡。
    结论:平衡工作和家庭生活不仅仅涉及工作时间;它还包括工作和家庭时间的质量。我们的发现强调了长期轮班的疗养院工作人员的工作与家庭生活之间复杂的相互作用。虽然存在挑战,好处,如延长休假时间,改善睡眠,减少压力,可预测的工作时间对他们的工作与生活平衡有积极的贡献。疗养院的长期轮班为实现工作与生活的平衡提供了独特的视角,揭示了这些时间表固有的挑战和优势。在这种情况下,了解疗养院工作人员的经验可以为未来的轮班安排创新提供信息,为医疗保健专业人员提供更加平衡和可持续的工作环境。对于一些医护人员来说,延长轮班可以带来更好的工作与生活平衡。
    BACKGROUND: Nursing home staff often face challenges in achieving a satisfactory work-life balance, particularly because of the nature of shift work. While long shifts offer extended periods off work, their impact on the delicate balance between work and leisure remains understudied in the context of nursing homes. This study investigated the experiences of nursing home staff in Norway working long shifts lasting 12-14 h and their perceptions of the balance between family life and work.
    METHODS: Eighteen nursing home staff members were interviewed following a semi-structured qualitative approach. The participants worked in three types of long shifts and provided insights into their experiences, addressing issues such as work hours, shift patterns, and work-family balance.
    RESULTS: The study revealed four main categories: (1) impact of long shifts on family life-the highs and lows; (2) maximizing time off with long shifts; (3) reducing job stress with long shifts; and (4) full-time work leads to predictable hours and stable income. The participants emphasised the distinct separation between work and leisure during long shifts, acknowledging limited social life during working periods but appreciating extended periods off. Family life posed challenges, especially with young children, but the participants found benefits in the longer periods of family time during days off. Longer rest periods and reduced commuting time were perceived as advantages of long shifts, contributing to better sleep, reduced stress and overall well-being. Long shifts also allowed for more predictable working hours and income, supporting a stable work-life balance.
    CONCLUSIONS: Balancing work and family life involves more than just the number of hours spent at work; it also encompasses the quality of those hours both at work and at home. Our findings underscore the complex interplay between work and family life for nursing home staff working long shifts. While challenges exist, benefits such as extended time off, improved sleep, reduced stress, and predictable working hours contribute positively to their work-life balance. Long shifts in nursing homes offer a unique perspective on achieving work-life balance, revealing both the challenges and advantages inherent in such schedules. Understanding the experiences of nursing home staff in this context can inform future innovations in shift scheduling, promoting a more balanced and sustainable work environment for healthcare professionals. For some healthcare staff, extended shifts can lead to a better work-life balance.
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  • 文章类型: Journal Article
    背景:耳鼻咽喉科(ORL)专家治疗不同年龄的患者,从患有头颈部肿瘤的老年患者到患有呼吸系统疾病的新生儿。尚未进行任何研究来探索影响UmmAl-Qura大学学生对ORL的偏好的因素。我们旨在调查影响麦加UmmAl-Qura大学医学生的因素和动机,沙特阿拉伯,他们选择从事ORL头颈部手术。
    方法:这项横断面研究于2023年在临床前的439名学生中进行了两个月,临床,和UmmAl-Qura大学医学院的实习年限,沙特阿拉伯。我们分享了一份谷歌表单问卷(谷歌,Inc.,山景,CA)和探索与耳朵兴趣相关的因素,鼻子,和喉咙(ENT)作为未来的专业。我们使用皮尔逊卡方检验得出结果。
    结果:共有339名(77.2%)参与者为女性。参与者平均分为临床前年份(213(48.5%))和临床年份(207(47.2%)),实习类别的百分比较小(19(4.3%))。据报道,159名参与者(36.2%)参与了ORL。
    结论:ORL的外科专业主要关注影响头部的疾病,脖子,鼻子,和耳朵。由于学生们发现这个专业很迷人,我们建议资深医生通过在医院和大学的讲座和活动,更加努力地启发受训医生了解这一专业领域。
    BACKGROUND: Otorhinolaryngology (ORL) specialists treat patients of different ages, ranging from elderly patients with head and neck tumors to neonates with respiratory problems. No studies have been conducted to explore the factors that affect the preference for ORL among Umm Al-Qura University students. We aimed to investigate factors and motivators influencing medical students at Umm Al-Qura University in Makkah, Saudi Arabia, who choose to pursue a career in ORL-head and neck surgery.
    METHODS: This cross-sectional study was conducted over two months in 2023 among 439 students in the pre-clinical, clinical, and internship years of the Faculty of Medicine at Umm Al-Qura University, Saudi Arabia. We shared a Google Forms questionnaire (Google, Inc., Mountain View, CA) and explored factors associated with interest in ear, nose, and throat (ENT) as a future specialty. We used Pearson\'s chi-square test to arrive at the results.
    RESULTS: A total of 339 (77.2%) participants were female. Participants were evenly divided between pre-clinical years (213 (48.5%)) and clinical years (207 (47.2%)), with a smaller percentage in the internship category (19 (4.3%)). ORL involvement was reported in 159 (36.2%) of the participants.
    CONCLUSIONS: The surgical specialty of ORL focuses mostly on conditions affecting the head, neck, nose, and ears. Since students found this specialty fascinating, we recommend that senior doctors make a greater effort to enlighten doctors-in-training about this field of expertise through lectures and campaigns at hospitals and universities.
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  • 文章类型: Journal Article
    目标:本研究调查了护士人员配备的影响,工作时间,强制加班,和营业额对急症护理医院护士结果的影响。以往的研究主要集中在次优护士人员配备的单一特征上,但没有综合考虑。方法:数据收集于2022年7月至9月,采用便利抽样和在线调查(N=397)。为了分析,28家医院的264名护士符合纳入标准。进行单变量分析和多变量广义估计方程(GEE)。结果:护士人员配备(β=-0.036,标准误差[SE]=0.011)和离职(β=-0.006,SE=0.003)是影响工作满意度的重要因素。在多变量GEE中,只有强制性加班(β=0.395,SE=0.116)与离职意向显著相关.护士人员配备,工作时间,强制加班,和营业额与倦怠没有显着相关。主观健康状况和工作量与职业倦怠显著相关。结论:应实施医院护士人员配备政策和改进计划,以提高护士的工作满意度。劳工政策应该禁止强制加班。
    Objectives: This study examined the impact of nurse staffing, working hours, mandatory overtime, and turnover on nurse outcomes in acute care hospitals. Previous studies have focused on the single characteristics of sub-optimal nurse staffing but have not considered them comprehensively. Methods: Data were collected in July-September 2022 using convenience sampling and an online survey (N = 397). For the analysis, 264 nurses working as staff nurses at 28 hospitals met the inclusion criteria. Univariate analysis and multivariable generalized estimating equation (GEE) were performed. Results: Both nurse staffing (β = -0.036, standard error [SE] = 0.011) and turnover (β = -0.006, SE = 0.003) were significant factors affecting job satisfaction. In the multivariable GEE, only mandatory overtime (β = 0.395, SE = 0.116) was significantly related to intent to leave. Nurse staffing, work hours, mandatory overtime, and turnover were not significantly related to burnout. Subjective health status and workload were significantly associated with burnout. Conclusion: Nurse staffing policies and improvement programs in hospitals should be implemented to improve nurses\' job satisfaction. Labor policy should ban mandatory overtime.
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  • 文章类型: Journal Article
    In this study, we review the initial impacts of the coronavirus disease 2019 (COVID-19) pandemic on the Canadian labour market. We focus on changes in employment and aggregate hours worked between February 2020 and April 2020 while accounting for normal monthly changes in these indicators. We find that COVID-19 induced a 32 percent decline in aggregate weekly work hours among workers aged 20-64 years, alongside a 15 percent decline in employment. We characterize the distribution of work lost, finding that nearly half of job losses are attributed to workers in the bottom earnings quartile. Those most affected by COVID-19 are in public-facing jobs in industries most affected by shutdowns (accommodation and food services), younger workers, paid hourly, and non-union. The results provide context for policy development, with both supply and demand sides of the labour market to consider.
    Les auteurs examinent les premiers impacts de la pandémie de la COVID-19 sur le marché du travail canadien. Ils se concentrent sur les changements en matière d’emploi et de nombre total d’heures travaillées entre février 2020 et avril 2020, en tenant compte des variations mensuelles normales de ces indicateurs. Ils constatent que la crise économique liée à la COVID‑19 a entraîné une diminution de 32 pour cent du nombre total d’heures de travail hebdomadaires et de 15 pour cent des emplois chez les personnes âgées de 20 à 64 ans. Ils analysent la répartition des emplois perdus, constatant que près de la moitié des pertes d’emploi sont attribuées aux travailleurs du quartile inférieur des gains. Les baisses d’emploi les plus marquées ont été enregistrées dans les industries les plus touchées par les fermetures, dans lesquelles la proximité physique est importante (services d’hébergement et de restauration), de même que parmi les jeunes travailleurs et les personnes occupant des emplois rémunérés à l’heure et non syndiqués. Les résultats de l’étude fournissent un contexte pour l’élaboration de politiques publiques assurant la prise en compte des changements tant du côté de l’offre que de celui de la demande de travail.
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  • 文章类型: Journal Article
    目的探讨护士睡眠质量与医疗差错倾向的关系。材料与方法本研究在某国立医院进行,一家私立医院,2020年9月至2021年10月,位于土耳其西部地区的一所大学医院(n=378名护士)。数据是使用社会人口统计学数据表格收集的,护理中的医疗差错倾向量表(METSN),匹兹堡睡眠质量指数(PSQI)。从参与研究的护士获得口头和书面同意。数据是通过面对面访谈收集的。结果护士PSQI平均得分为8.25±4.81,METSN平均得分为230.29±14.15。发现年龄有显著差异,婚姻状况,学校教育水平,每周工作时间,护士的轮班时间表及其睡眠质量(p<0.001)。发现年龄有显著差异,婚姻状况,学校教育水平,护士工作的医院,以及犯医疗错误的倾向(p<0.001)。PSQI和METSN评分之间存在统计学上显著的负相关性和中等相关性(p<0.001;r=-0.548)。结论护士发生医疗差错的倾向较低,他们的睡眠质量很差。我们还确定,随着睡眠质量恶化,护士发生医疗差错的趋势增加。
    Objective  To examine the relationship between nurses\' sleep quality and their tendency to commit medical errors. Materials and Methods  The research was conducted in a state hospital, a private hospital, and a university hospital in a province located in the west region of Turkey (n = 378 nurses) between September 2020 and October 2021. Data was collected using a sociodemographic data form, the Medical Error Tendency Scale in Nursing (METSN), and the Pittsburgh Sleep Quality Index (PSQI). Verbal and written consent were obtained from the nurses who participated in the study. The data were collected through face-to-face interviews. Results  The mean score of the nurses was of 8.25 ± 4.81 on the PSQI and of 230.29 ± 14.15 on the METSN. A significant difference was found regarding age, marital status, level of schooling, weekly working hours, and the shift schedule of nurses and their sleep quality ( p  < 0.001). A significant difference was found regarding age, marital status, level of schooling, the hospital the nurses worked in, and the tendency to commit medical errors ( p  < 0.001). There was a statistically significant negative and moderate correlation between the PSQI and METSN scores ( p  < 0.001; r = -0.548). Conclusion  The tendency of nurses to commit medical errors was determined as low, and their sleep quality was poor. We have also determined that, as the sleep quality worsened, the tendency of nurses to commit medical errors increased.
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  • 文章类型: Journal Article
    背景:非典型的时间工作模式,例如工作时间长于标准的35-40小时/周,周末工作,和非标准的工作时间表(即在典型的9-5之外,包括但不限于轮班工作)在英国越来越普遍。除了针对特定职业的研究,关于这些非典型的时间工作模式对英国工人睡眠的影响知之甚少,尽管睡眠不佳与不良健康问题有关,工作效率较低,和经济成本。
    方法:我们使用回归模型来调查三种类型的非典型时间工作模式之间的关联(每周工作时间长短,周末工作,和非标准时间表)以及睡眠持续时间和干扰,使用英国家庭纵向研究中2012-2014年和/或2015-2017年超过25,000名就业男女的数据,调整潜在的混杂因素和心理社会工作因素。
    结果:我们发现,相对于标准的35-40小时/周,每周工作55小时或以上与短睡眠(少于7小时/夜)和睡眠障碍有关。与非周末相比,大多数/所有周末工作都与睡眠不足有关,长时间睡眠(超过8小时/晚),和睡眠障碍,与标准时间表(固定的日时间表)相比,非标准时间表也是如此。进一步的分析表明存在一些性别差异。
    结论:这些结果应促使雇主和政策制定者认识到休息和恢复的必要性,考虑如何改进工作的时间安排,以更好地支持工人的健康和生产力,并考虑为任何需要工作非典型时间工作模式的人提供适当的补偿。
    BACKGROUND: Atypical temporal work patterns such as working longer than the standard 35-40 h/ week, weekend working, and nonstandard work schedules (i.e. outside of the typical 9-5, including but not restricted to shiftwork) are increasingly prevalent in the UK. Aside from occupation-specific studies, little is known about the effects of these atypical temporal work patterns on sleep among workers in the UK, even though poor sleep has been linked to adverse health problems, lower workplace productivity, and economic costs.
    METHODS: We used regression models to investigate associations between three types of atypical temporal work patterns (long and short weekly work hours, weekend working, and nonstandard schedules) and sleep duration and disturbance using data from over 25,000 employed men and women from 2012-2014 and/or 2015-2017 in the UK Household Longitudinal Study, adjusting for potential confounders and psychosocial work factors.
    RESULTS: We found that relative to a standard 35-40 h/week, working 55 h/week or more was related to short sleep (less than 7 h/night) and sleep disturbance. Working most/all weekends compared to non-weekends was associated with short sleep, long sleep (more than 8 h/night), and sleep disturbance, as was working nonstandard schedules relative to standard schedules (fixed day-time schedules). Further analyses suggested some gender differences.
    CONCLUSIONS: These results should prompt employers and policymakers to recognise the need for rest and recovery, consider how the timing and scheduling of work might be improved to better support workers\' health and productivity, and consider appropriate compensation for anyone required to work atypical temporal work patterns.
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  • 文章类型: Journal Article
    背景:调查工作时间的传统方法依赖于员工在工作地点的实际存在。然而,准确识别工作地点的休息时间和区分工作地点以外的远程工作对工时估算提出了挑战。机器学习有可能区分工作和下班时的人与智能手机交互。
    目的:在本研究中,我们的目标是开发一种名为“工作模式中的概率”的新方法,它利用人与智能手机的交互模式和相应的GPS位置数据来估计工作时间。
    方法:要捕获人与智能手机的交互和GPS位置,我们使用了“员工时间”应用程序,由我们的团队开发,被动地和连续地记录参与者\'屏幕事件,包括通知的时间戳,屏幕打开或关闭事件,和应用程序使用模式。极端梯度增强树被用来将这些相互作用模式转化为概率,而一维卷积神经网络根据先前的序列概率生成连续概率。由此产生的工作模式的可能性使我们能够辨别办公室工作的时期,下班,在工地休息,远程工作。
    结果:我们的研究包括121名参与者,总计5503人日(人日代表所有参与者收集和分析数据的累计天数).开发的机器学习模型表现出平均的预测性能,由接收器工作特性曲线下的面积测量,0.915(SD0.064)。使用工作模式中的概率(高于0.5)估计的工作时间明显长于GPS定义的工作时间(平均每天11.2,SD2.8小时)(平均每天10.2,SD2.3小时;P<.001)。这种差异归因于111.6(SD106.4)分钟的远程工作时间高于54.7(SD74.5)分钟的休息时间。
    结论:我们新颖的方法,工作模式中的概率,利用人与智能手机的交互模式和机器学习模型来提高工时调查的精度和准确性。通过集成人与智能手机的交互和GPS数据,我们的方法提供了对工作模式的宝贵见解,包括远程工作和休息,在优化工作效率和福祉方面提供潜在的应用。
    Traditional methods for investigating work hours rely on an employee\'s physical presence at the worksite. However, accurately identifying break times at the worksite and distinguishing remote work outside the worksite poses challenges in work hour estimations. Machine learning has the potential to differentiate between human-smartphone interactions at work and off work.
    In this study, we aimed to develop a novel approach called \"probability in work mode,\" which leverages human-smartphone interaction patterns and corresponding GPS location data to estimate work hours.
    To capture human-smartphone interactions and GPS locations, we used the \"Staff Hours\" app, developed by our team, to passively and continuously record participants\' screen events, including timestamps of notifications, screen on or off occurrences, and app usage patterns. Extreme gradient boosted trees were used to transform these interaction patterns into a probability, while 1-dimensional convolutional neural networks generated successive probabilities based on previous sequence probabilities. The resulting probability in work mode allowed us to discern periods of office work, off-work, breaks at the worksite, and remote work.
    Our study included 121 participants, contributing to a total of 5503 person-days (person-days represent the cumulative number of days across all participants on which data were collected and analyzed). The developed machine learning model exhibited an average prediction performance, measured by the area under the receiver operating characteristic curve, of 0.915 (SD 0.064). Work hours estimated using the probability in work mode (higher than 0.5) were significantly longer (mean 11.2, SD 2.8 hours per day) than the GPS-defined counterparts (mean 10.2, SD 2.3 hours per day; P<.001). This discrepancy was attributed to the higher remote work time of 111.6 (SD 106.4) minutes compared to the break time of 54.7 (SD 74.5) minutes.
    Our novel approach, the probability in work mode, harnessed human-smartphone interaction patterns and machine learning models to enhance the precision and accuracy of work hour investigation. By integrating human-smartphone interactions and GPS data, our method provides valuable insights into work patterns, including remote work and breaks, offering potential applications in optimizing work productivity and well-being.
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  • 文章类型: Journal Article
    目标:我们通过每日睡眠时间与每日工作时间的比率来表达综合效应。这项研究的目的是讨论每日睡眠时间/工作时间(SH/WH)比率对糖尿病风险的预测能力。方法:使用Cox比例风险回归计算新发糖尿病的风险比(HR)。进行了限制性三次样条分析,以可视化SH/WH比率和糖尿病风险的影响趋势。结果:RCS模型揭示了SH/WH比值与糖尿病风险之间的非线性和L形相关性。与SH/WH比值<1的参与者相比,比值≥1的参与者患糖尿病的风险较低。与Q1组相比,Q2,Q3,Q4和Q5组新发糖尿病的多变量调整风险比(HRs)和95%置信区间(CIs)为0.82(0.57,1.19),1.05(0.69,1.59),0.57(0.36,0.91),0.66(0.42,1.06)。Kaplan-Meier曲线显示Q4组累积发生率较低。结论:睡眠时间长于工作时间(SH/WH比值≥1)可降低患糖尿病的风险。在SH/WH比率的1.10-<1.37(第四个五分之一)观察到最小风险。
    Objectives: We expressed the combined effect by the ratio of daily sleep time to daily work time. The aim of this study was to discussed the predictive ability of daily sleep hours/work hours (SH/WH) ratio for diabetes risk. Methods: Cox proportional hazards regression was used to calculate the hazard ratios (HRs) of new-onset diabetes. Restricted cubic spline analyses were performed to visualize the influence trend of SH/WH ratio and diabetes risk. Results: The RCS model revealed a non-linear and L-shaped correlation between SH/WH ratio and diabetes risk. Compared with the participates with SH/WH ratio <1, those with a ratio ≥1 had a lower risk of developing diabetes. The multivariable adjusted hazard ratios (HRs) with 95% confidence intervals (CIs) of new-onset diabetes in Q2, Q3, Q4 and Q5 groups compared with Q1 group were 0.82 (0.57, 1.19), 1.05 (0.69, 1.59), 0.57 (0.36, 0.91), 0.66 (0.42, 1.06). The Kaplan-Meier curve showed that Q4 group had lower cumulative incidence. Conclusion: Sleeping longer than working (SH/WH ratio ≥1) can reduce risk for developing diabetes. A minimal risk observed at 1.10-<1.37 (the fourth quintile) of SH/WH ratio.
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  • 文章类型: Journal Article
    各种形式的活动参与之间的关联(如工作、休闲)和工人的压力经历已经被广泛记录。这些影响的潜在机制,然而,没有完全理解。我们的目标是调查感知的全天工作量是否占日常活动频率(即工作时间和休闲/休息)与日常压力之间的关系。我们分析了56名1型糖尿病(T1D)工人的数据,他们完成了大约两周的纵向强化评估。使用美国国家航空航天局任务负荷指数(NASA-TLX)的改编版本来测量每日全天工作量。据报道,包括律师在内的各种职业,管家,和老师。在多级路径分析中,全天工作量的日常变化介导了67%(p<.001),61%(p<.001),38%(p<.001),55%(p<.001)的压力和工作时间之间的人内关系,休息频率,活跃的休闲频率,一周中的一天,分别。我们的结果提供了证据,表明全天的工作量感知可能有助于将T1D工人的日常活动与日常压力联系起来的过程。感知一整天的工作量可能值得更多关注,作为可能的压力干预目标,也许人体工程学专家会特别适合解决的问题。
    Associations between various forms of activity engagement (e.g. work, leisure) and the experience of stress in workers have been widely documented. The mechanisms underlying these effects, however, are not fully understood. Our goal was to investigate if perceived whole day workload accounted for the relationships between daily frequencies of activities (i.e. work hours and leisure/rest) and daily stress. We analyzed data from 56 workers with type 1 diabetes (T1D) who completed approximately two weeks of intensive longitudinal assessments. Daily whole day workload was measured with an adapted version of the National Aeronautics and Space Administration Task Load Index (NASA-TLX). A variety of occupations were reported including lawyer, housekeeper, and teacher. In multilevel path analyses, day-to-day changes in whole day workload mediated 67% (p<.001), 61% (p<.001), 38% (p<.001), and 55% (p<.001) of the within-person relationships between stress and work hours, rest frequency, active leisure frequency, and day of week, respectively. Our results provided evidence that whole day workload perception may contribute to the processes linking daily activities with daily stress in workers with T1D. Perceived whole day workload may deserve greater attention as a possible stress intervention target, ones that perhaps ergonomists would be especially suited to address.
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  • 文章类型: Journal Article
    目的:包括急性和慢性睡眠限制影响的人类神经行为表现的数学模型可以成为评估和比较工作时间表的关键工具,当经验评估不切实际时,允许对绩效进行定量预测。
    方法:使用这样的模型,我们检验了这样一个假设,即住院医师在工作时间延长的工作名册上工作,包括连续工作24-28小时,平均每周工作88小时,超过4周,比住院医师进行快速循环工作名册干预以减少延长轮班时间的预期表现要差。使用的性能指标是注意力故障(即,精神运动警惕任务失效)。模型输入为169个实际工作和睡眠时间表。结果是在中等(相当于连续觉醒16-20小时)或高(相当于连续觉醒≥20小时)表现障碍的工作时间内每周预测的小时数。
    结果:该模型预测,长期工作名册的住院医师比快速循环工作名册的住院医师在中度损伤(p=.02,效应大小=0.2)时会花费更多的时间;这种差异在昼夜节律中最为明显(p<.001)。在这两个时间表上,预计性能将从1+2周下降到3+4周(p<.001),但长期工作名册的下降率显着更大(p<.01)。预测的表现障碍与先前的睡眠持续时间成反比(p<.001)。
    结论:这些发现证明了数学模型的实用性,可以评估住院医师和其他经历慢性睡眠限制和昼夜节律失调的人的时间表的预测表现。
    OBJECTIVE: Mathematical models of human neurobehavioral performance that include the effects of acute and chronic sleep restriction can be key tools in assessment and comparison of work schedules, allowing quantitative predictions of performance when empirical assessment is impractical.
    METHODS: Using such a model, we tested the hypothesis that resident physicians working an extended duration work roster, including 24-28 hours of continuous duty and up to 88 hours per week averaged over 4weeks, would have worse predicted performance than resident physicians working a rapidly cycling work roster intervention designed to reduce the duration of extended shifts. The performance metric used was attentional failures (ie, Psychomotor Vigilance Task lapses). Model input was 169 actual work and sleep schedules. Outcomes were predicted hours per week during work hours spent at moderate (equivalent to 16-20 hours of continuous wakefulness) or high (equivalent to ≥20 hours of continuous wakefulness) performance impairment.
    RESULTS: The model predicted that resident physicians working an extended duration work roster would spend significantly more time at moderate impairment (p = .02, effect size=0.2) than those working a rapidly cycling work roster; this difference was most pronounced during the circadian night (p < .001). On both schedules, performance was predicted to decline from weeks 1 + 2 to weeks 3 + 4 (p < .001), but the rate of decline was significantly greater on extended duration work roster (p < .01). Predicted performance impairment was inversely related to prior sleep duration (p < .001).
    CONCLUSIONS: These findings demonstrate the utility of a mathematical model to evaluate the predicted performance profile of schedules for resident physicians and others who experience chronic sleep restriction and circadian misalignment.
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