AIM: To examine whether shift work accelerates metabolic syndrome (MetS) development among early middle-aged males with elevated alanine aminotransferase (e-ALT).METHODS: A retrospective, observational followup study ...AIM: To examine whether shift work accelerates metabolic syndrome (MetS) development among early middle-aged males with elevated alanine aminotransferase (e-ALT).METHODS: A retrospective, observational followup study on MetS development at a 5-year interval was conducted using health examination data. Nine hundred and ninety six male employees not fulfi lling MetS criteria at screening were enrolled. Age, MetScomponents, liver enzymes, serological markers for viral hepatitis, abdominal ultrasound, insulin resistance status, lifestyles, and workplace factors were analyzed.RESULTS: The prevalence of elevated serum ALT (> 40 U/L, e-ALT) at baseline was 19.1%. There were 381 (38.3%) workers with long-term exposures to day-night rotating shift work (RSW). 14.2% of subjects developed MetS during follow-up. After 5 years, the workers with e-ALT had significantly unfavorable changes in MetS-components, and higher rates of MetS development, vs subjects with normal baseline ALT levels. Workers with both baseline e-ALT and 5-year persistent RSW (pRSW) exposure had the highest rate of MetS development. Also, e-ALT-plus-pRSW workers had a significant increase in MetS-components atfollow-up, compared with the other subgroups. After controlling for potential confounders, e-ALT-plus-pRSW workers posed a signifi cant risk for MetS development (odds ratio, 2.7; 95% confi dence interval, 1.4-5.3, vs workers without baseline e-ALT nor pRSW). CONCLUSION: We suggest that all early middle-aged male employees with e-ALT should be evaluated and managed for MetS. Particularly in terms of job arrangements, impacts of long-term RSW on MetS development should be assessed for all male employees having baseline e-ALT.展开更多
<strong>Introduction: </strong>The consequences of shift work on health, psychological balance and socio-family life are multiple and universally known. <strong>Objective:</strong> The aim of t...<strong>Introduction: </strong>The consequences of shift work on health, psychological balance and socio-family life are multiple and universally known. <strong>Objective:</strong> The aim of this survey was to describe the impact of shift work on nurses’ health and quality life. <strong>Methodology:</strong> This was a cross-sectional descriptive study of the exposed and non-exposed type from May 2013 to July 2013, <em>i.e.</em> for a period of 3 months. We had included and divided into two groups the nurses working in the various departments of the Loandjili General Hospital (LGH). A questionnaire derived from the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale had been used to collect the data. <strong>Results:</strong> Of the 91 nurses considered, including 59 in shift work (group I) and 32 in daytime work (group II), significant associations were found between shift work on the one hand and sleep problems on the other hand in all these aspects, stress and appetite disturbances. However, no significant association was found between shift work on the one hand and the use of sleeping pills on the other hand. Fatigue, mood disorders and the notion of free time (at home and for leisure), although the frequencies are relatively high in the group of nurses on shift work. <strong>Conclusion:</strong> Our results show that nurses’ health, social and family life at Loandjili General Hospital are negatively impacted by shift work. There is a need to put in place means of prevention.展开更多
Objective:The aim of the study was to evaluate the quality of sleep in nurses performing shift work in therapeutic and surgical depar tments and to establish possible relationships between level of blood pressure(BP)a...Objective:The aim of the study was to evaluate the quality of sleep in nurses performing shift work in therapeutic and surgical depar tments and to establish possible relationships between level of blood pressure(BP)and quality of sleep.Methods:A total of 20 nurses of the therapeutic depar tments and 20 nurses of the surgical depar tments were enrolled in the study.Sleep quality was assessed using the Pittsburgh Sleep Quality Index(PSQI).BP was measured according to the standard protocol using the Korotkoff method;a sphygmomanometer was used for this twice with an interval of 2 min between 10:00 a.m.and 10:30 a.m.The average value for the 2 indicators was calculated.The diagnosis of essential ar terial hyper tension(AH)was established according to the recommendations of the European Association of Cardiology and the European Association of Hypertension(2018).Results:The overall assessment of the sleep quality of the nurses involved in shift work indicates poor sleep quality;this was true in respondents of both the surgical and therapeutic profiles.However,it was observed that the quality of sleep was significantly lower in nurses of the therapeutic departments.Moreover,poor sleep quality was associated with AH,which was diagnosed in 65%of the nurses of the therapeutic departments and 45%of the nurses of the surgical departments,that is,in almost all of the subjects.Herewith,in the nurses of the therapeutic departments,the level of systolic BP exceeded that of the nurses of the surgical departments.Conclusions:Poor sleep quality is a significant risk factor for AH development and is relevant to nurses performing shift work.Additional clinical studies should be conducted to better understand the mechanisms underlying such adverse cardiometabolic outcomes associated with sleep disorders in the health-sector shift workers.展开更多
Objectives: The aim of this study was to compare nutrients intake, anthropometric, biochemical and psychiatric indices between shift working and day-time nurses. Methods: A cross-sectional comparative study was conduc...Objectives: The aim of this study was to compare nutrients intake, anthropometric, biochemical and psychiatric indices between shift working and day-time nurses. Methods: A cross-sectional comparative study was conducted in which ninety eight female nurses (55 day-time workers and 43 shift workers) from six educational hospitals of Jondi-Shapour University of medical sciences, Ahvaz, Iran were participated. A questionnaire including dietary, anthropometric, disease history and lifestyle pattern questions was completed and 3-day 24-hour recalls, Beck Depression Inventory (BDI) and Hospital Anxiety and Depression Scale (HADS) were collected. Serum hs-CRP and 25(OH)D3 concentrations were measured by immunoturbidimetric and electrochemiluminescent immunoassay method, respectively. Anthropometric indices were measured according to World health organization standard protocol. Independent sample t and chi-square tests were used for statistical analysis. Results: There was a lower dietary intake of thiamin, riboflavin, niacin, folate, magnesium and iron in shift worker compared with day-time nurses (p < 0.05). No significant differences in serum hs-CRP concentrations, serum 25(OH)D3 levels, vitamin D deficiency percentage, hemoglobin and hematocrite concentrations, and also anthropometric and psychiatric variables were found between two groups. Duration of exposure to sunlight was significantly higher in shift workers than in day time nurses. Engagement time in weekly physical exercise was around 11 times greater in day-time nurses compared with the shift work nurses (p = 0.001). Conclusions: This study showed that shift working is associated with some nutritional deficiencies and sedentary lifestyle among female nurses.展开更多
Objective:To examine the association between sleep characteristics and night shift work and the risk of polycystic ovary syndrome(PCOS)in Chinese women and to investigate their relationship with infertility in PCOS.Me...Objective:To examine the association between sleep characteristics and night shift work and the risk of polycystic ovary syndrome(PCOS)in Chinese women and to investigate their relationship with infertility in PCOS.Methods:From March 21,2021 to April 31,2021,3927 Chinese women with or without PCOS were recruited online.All participants completed WeChat-based electronic questionnaires.Sleep characteristics were measured using the Pittsburgh sleep quality index.Results:A total of 2871 women were included in the final analysis.Sleep duration(odds ratio[OR],0.857;95%confidence interval[CI],0.763-0.963),sleep midpoint(OR,1.142;95%CI,1.049-1.244),sleep disturbance(OR,1.320;95%CI,0.957-1.146),daytime dysfunction(OR,1.136;95%CI,1.030-1.253),and night shift work(OR,1.628;95%CI,1.264-2.097)were associated with a higher risk of PCOS.After adjusting for confounders,including age,body mass index,smoking status,and coffee and tea drinking status,sleep disturbance(OR,1.314;95%CI,1.111-1.555),daytime dysfunction(OR,1.143;95%CI,1.034-1.264),and night shift work(OR,1.800;95%CI,1.388-2.333)remained associated.In addition,sleep disturbance(OR,1.887;95%CI,1.400-2.542)and subjective sleep quality(OR,1.299;95%CI,1.037-1.627)were associated with infertility in women with PCOS,and sleep disturbance(OR,1.750;95%CI,1.281-2.390)remained significant after adjusting for confounders.Conclusions:Sleep disturbance,daytime dysfunction,and night shift work are significantly associated with PCOS.Screening for sleep disturbances and providing appropriate treatment could be potential strategies for managing PCOS and its long-term complications.展开更多
Purpose: To investigate the relationship between stress, fatigue and sleep quality among shift work nurses in Japan. Design: A descriptive correlation design using self-administered surveys. Methods: Questionnaires on...Purpose: To investigate the relationship between stress, fatigue and sleep quality among shift work nurses in Japan. Design: A descriptive correlation design using self-administered surveys. Methods: Questionnaires on stress, fatigue and sleep quality (the Pittsburgh Sleep Quality Index;PSQI-J) among shift work nurses were distributed to 653 nurses in Japan from January 2015 to February 2015. Results: Participants who reported higher levels of fatigue reported higher levels of stress (r = 0.774, p = 0.000), lower levels of sleep satisfaction (r = −0.411, p = 0.000) and overall lower levels of health (r = −0.323, p = 0.000).PSQI scores were also significantly correlated with reported levels of stress (r = 0.294, p = 0.000), fatigue (r = 0.291, p = 0.000) and levels of health (r = −0.370, p = 0.000). Nurses who have stress-relieving recourses were younger (t = −2.842, p = 0.005), reported higher levels of overall health (t = 2.727, p = 0.007), had higher levels of sleep quality measured by the PSQI (t = −2.560, p = 0.011), and required less time to fall asleep (t = −3.207, p = 0.001). Conclusions: This study showed an association between stress and sleep satisfaction among shift work nurses in Japan. In addition, nurses that engage in activities to manage stress might achieve higher levels of health and high sleep quality.展开更多
Purpose To assess the effect of a 12 week resistance or aerobic training intervention on markers of cardio-metabolic func-tion and sleep among male rotational shift workers.Method Thirty-eight sedentary,apparently hea...Purpose To assess the effect of a 12 week resistance or aerobic training intervention on markers of cardio-metabolic func-tion and sleep among male rotational shift workers.Method Thirty-eight sedentary,apparently healthy,male rotational shift workers were recruited and randomly allocated to a non-exercise control(CON)group,3 sessions/week of moderate intensity continuous(MICT),or resistance training(RT)for 12 weeks in a semi-supervised setting.Pre-and post-testing assessed markers of cardio-metabolic function including peak oxygen uptake(VO2peak),glucose metabolism,insulin sensitivity,body composition,inflammatory markers,and 14 day actigraphy sleep assessment.Results Mean session attendance across the intervention was 25(±7)of a possible 36 sessions.A significant group by time interaction was observed for MICT,with lower c-reactive protein(CRP)values observed post-training(P=0.049).A significant effect for time was observed for both MICT(n=9;P=0.04)and RT(n=10;P=0.021),increasing total sleep time(TST)following a night shift post-intervention.Data redistribution regarding exercise adherence:<24(N-ADHERE)or≥24(ADHERE)resulted in significant pre-to-post reduction in body fat(P=0.024)and fat mass percentage(P=0.014)among ADHERE.No differences were observed for any intervention group on insulin sensitivity,glucose metabolism or oxygen uptake.Conclusion The results of the current study support exercise as a valid intervention to improve the cardio-metabolic health of rotational shift workers.Average sessional attendance suggests shift workers face barriers to exercise that may need to be addressed to improve health outcomes.展开更多
Purpose To assess the acute effect of moderate and high-intensity exercise on markers of cardio-metabolic function among rotational shift workers.Methods Sedentary men(n=26,age:38±8 years;BMI:32.2±6.0 kg/m^(...Purpose To assess the acute effect of moderate and high-intensity exercise on markers of cardio-metabolic function among rotational shift workers.Methods Sedentary men(n=26,age:38±8 years;BMI:32.2±6.0 kg/m^(2),VO_(2peak)32.6±6.7 mL/kg/min)employed in rotational shift work were recruited and underwent objectively assessed sleep quality(~7 days actigraphy)prior to reporting for laboratory testing.Baseline venous blood was collected to analyse fasted glucose,insulin and inflammatory cytokines tumor necrosis factor(TNF)-α,interleukin(IL)-6 and IL-1 receptor antagonist(IL-1Ra).Participants were randomly allo-cated a 30 min cycling intervention of either high intensity interval training(HIIT):1:4 ratio of 60 s at 100%and 240 s at 50%VO_(2peak),or moderate intensity continuous training(MICT);continuous cycling at 60%VO_(2peak).Fasted venous blood was collected post intervention(0,30,60 min)before subsequent night’s sleep was assessed via actigraphy.Results HIIT(P<0.016)and MICT(P<0.016)significantly increased IL-1Ra immediately and 30 min post exercise.Significantly decreased wake after sleep onset(WASO)were observed following MICT(P<0.05).No significant changes were observed for supplementary sleep variables,insulin sensitivity,IL-6 or TNF-αfor either intervention group(P>0.05).Conclusion High-and moderate-intensity exercise acutely increase anti-inflammatory markers post exercise and MICT significantly reduces sleep fragmentation in rotational shift workers.Results which are associated with improved cardio-metabolic function and indicate the potential validity of exercise as an intervention to offset the hypothesised adverse health effects of rotational shift work.展开更多
Considering the effect of work roll shifting on roll temperature field,a finite difference method of PR format for roll temperature field was presented,which can meet the requirements of accuracy and speed of online c...Considering the effect of work roll shifting on roll temperature field,a finite difference method of PR format for roll temperature field was presented,which can meet the requirements of accuracy and speed of online calculation.The step-by-step accumulation method was used to simulate the roll temperature field and thermal crown,and the evolution of roll thermal crown in a rolling campaign was studied.And then,the effects of strip width,rolling rhythm and work roll shifting on roll thermal crown were analyzed.It is found that work roll shifting can disperse the thermal expansion of the roll body especially the edge to make roll thermal contour uniform.The effect of work roll shifting on roll thermal crown is mainly concentrated in regions around twice of roll shifting stroke,and the change range of roll thermal crown is±30μm or so in the same roll body location.展开更多
Aiming at decreasing the hub transportation costs, a railway hub shift working plan in terms of multicommodity network flow model is set up for considering ...Aiming at decreasing the hub transportation costs, a railway hub shift working plan in terms of multicommodity network flow model is set up for considering the coordination of freight working,train working and locomotive working plans.The solution and the calculating results are also introduced.展开更多
Objectives:Newly graduated nurses commence night shifts during a phase of heightened vulnerability to reality shock,exacerbating the challenges faced by these graduates.Therefore,this study aimed to identify the chall...Objectives:Newly graduated nurses commence night shifts during a phase of heightened vulnerability to reality shock,exacerbating the challenges faced by these graduates.Therefore,this study aimed to identify the challenges experienced by newly graduated nurses when undertaking night shifts in order to help identify a strategy for supporting their adaptation to these shifts.Methods:Semi-structured personal interviews were used to collect data.Fifteen newly graduated nurses were selected to participate in the study by purposive sampling method from November 2021 to March 2022 in one of four general hospitals situated in the southwestern region of Japan.Semi-structured interviews were analyzed by using thematic analysis.Results:The analysis revealedfive central themes and nine subthemes:challenges in task efficiency(task organization challenges,challenges in time-constrained task performance),challenges in responding to patients’changing conditions(challenges in responding to patients’irregular conditions,challenges in responding to nighttime changes in patients’behaviors),challenges in independent practice(challenges in engaging in independent nursing practice,challenges in dealing with unexpected events),challenges in establishing collaborative relationships(challenges in working closely with other staff,challenges in establishing collaborative relationships during night shifts with limited resources),challenges in adapting to shift work(challenges in managing physical conditions for shift work).Conclusions:Newly graduated nurses often encounter challenges in performing their tasks during the transition period.When working night shifts,they face additional hurdles unique to nocturnal duties.Thefindings underscore the necessity for these graduates to develop night shift-specific readiness to effectively navigate the demands inherent in such work schedules.展开更多
An optimization solution to roll shifting strategy for alternately rolling campaign is presented. All the strips in a rolling campaign are divided into narrow strips and wide ones, and shifting position of narrow stri...An optimization solution to roll shifting strategy for alternately rolling campaign is presented. All the strips in a rolling campaign are divided into narrow strips and wide ones, and shifting position of narrow strips is obtained by the recursive method, and then shifting position of wide strips is optimized by NSGA-II which is a multiobjective genetic algorithm. For wide strips, a multi-objective optimization model of roll shifting strategy is pro posed, which takes 3 wear contour factors including edge smoothness, body smoothness and edge drop as optimization objectives. The Pareto optimal front of roll shifting strategy can be gained quickly by NSGA-II, which suggests a series of alternative solutions to roll shifting strategy. Analysis shows that the conflict exists among the 3 objectives. The final optimal solution is selected from the Pareto optimal solutions by the weighted-sum decision-making method. Industrial production proves the validity of the solution, and it can improve strip profile of alternately rolling, reduce strip edge wave, and extend the rolling miles of rolling campaigns.展开更多
A new roll shifting strategy with varying stroke and varying step was investigated,Two characteristic parameters including cat ear height and gap contour smoothness were introduced to assess the effect of shifting str...A new roll shifting strategy with varying stroke and varying step was investigated,Two characteristic parameters including cat ear height and gap contour smoothness were introduced to assess the effect of shifting strategy on roll wear,and the relation between characteristic parameters and shifting strategy was established.Both varying stroke and varying step can reduce cat ear height and gap contour smoothness,so the shifting strategy with varying stroke and varying step is better than the one with either varying stroke or varying step,Based on the effect of shifting control parameters on characteristic parameters of roll wear,the selection principle of these shifting control parameters was gained.A case study was conducted to validate the proposed roll shifting strategy,reducing uncontrollable quartic loading gap contour,improving strip profile and extending rolling length of a rolling campaign.展开更多
day work and shift work) and cigarette smoking in Japanese workers. We used data of 3,238 men (39.3 ± 10.5 years) and 5,111 women (37.1 ± 10.9 years), aged 20 - 59 years, by cross-sectional clinical investig...day work and shift work) and cigarette smoking in Japanese workers. We used data of 3,238 men (39.3 ± 10.5 years) and 5,111 women (37.1 ± 10.9 years), aged 20 - 59 years, by cross-sectional clinical investigation study. Work style i.e. day work and shift work, cigarette smoking, status of stress and stress coping were obtained by questionnaires by well-trained medical staff. A total of 227 men (7.0%) and 339 women (6.6%) were shift workers, and 1346 men (41.6%) and 649 women (12.7%) were current smokers. Work style was significantly linked to cigarette smoking, stress and stress coping after adjusting for age in women. In addition, the level of stress coping in subjects with cigarette smoking was significantly lower than that in subjects without cigarette smoking even after adjusting for age in women. However, these associations were not noted in men. Work style was critically associated with cigarette smoking in Japanese female workers.展开更多
Prolonged night shift is associated with high burnout rate, but the physiological effects of a 16 h shift remain undetermined. Here we evaluated fatigue and stress via salivary assays to determine the correlation betw...Prolonged night shift is associated with high burnout rate, but the physiological effects of a 16 h shift remain undetermined. Here we evaluated fatigue and stress via salivary assays to determine the correlation between stress and fatigue and prolonged night shifts. Twenty-five nurses (9 men, 16 women;16 h night shift (n = 13), 8 h day shift (n = 12)) from Juntendo University Koshigaya Hospital were evaluated for four consecutive workdays separated by off days. Salivary samples were collected upon waking and before sleep on non-working days, before and after the day and night shifts, and before and after the break during the nocturnal schedule, and analyzed for levels of cortisol, chromogranin A, α-amylase activity and secretory immunoglobulin A (sIgA). On non-working days, cortisol levels showed similar kinetic pattern in both nurses. On working days, day-time nurses’ cortisol levels showed normal circadian pattern throughout the shift. Night nurses’ cortisol levels at the beginning of the shift were comparable to that of the normal morning elevation. α-Amylase activity in the night shift nurses was higher than day shift nurses through each period. No significant differences in chromogranin A and sIgA levels were detected between day and night shift workers. A 16 h night shift may cause marked circadian misalignment in cortisol levels.展开更多
This editorial explores the significant cardiometabolic outcomes of nocturnal sentry duty and its broader implications for other professions with overnight work.Highlighting the paradox of essential nighttime labor an...This editorial explores the significant cardiometabolic outcomes of nocturnal sentry duty and its broader implications for other professions with overnight work.Highlighting the paradox of essential nighttime labor and its adverse physiological effects,we discuss how occupations like healthcare,hospitality,and emergency services are similarly affected.The study by Lin et al provides critical insights into these dynamics and lays the groundwork for understanding nocturnal duty’s multifaceted impact on human health.展开更多
文摘AIM: To examine whether shift work accelerates metabolic syndrome (MetS) development among early middle-aged males with elevated alanine aminotransferase (e-ALT).METHODS: A retrospective, observational followup study on MetS development at a 5-year interval was conducted using health examination data. Nine hundred and ninety six male employees not fulfi lling MetS criteria at screening were enrolled. Age, MetScomponents, liver enzymes, serological markers for viral hepatitis, abdominal ultrasound, insulin resistance status, lifestyles, and workplace factors were analyzed.RESULTS: The prevalence of elevated serum ALT (> 40 U/L, e-ALT) at baseline was 19.1%. There were 381 (38.3%) workers with long-term exposures to day-night rotating shift work (RSW). 14.2% of subjects developed MetS during follow-up. After 5 years, the workers with e-ALT had significantly unfavorable changes in MetS-components, and higher rates of MetS development, vs subjects with normal baseline ALT levels. Workers with both baseline e-ALT and 5-year persistent RSW (pRSW) exposure had the highest rate of MetS development. Also, e-ALT-plus-pRSW workers had a significant increase in MetS-components atfollow-up, compared with the other subgroups. After controlling for potential confounders, e-ALT-plus-pRSW workers posed a signifi cant risk for MetS development (odds ratio, 2.7; 95% confi dence interval, 1.4-5.3, vs workers without baseline e-ALT nor pRSW). CONCLUSION: We suggest that all early middle-aged male employees with e-ALT should be evaluated and managed for MetS. Particularly in terms of job arrangements, impacts of long-term RSW on MetS development should be assessed for all male employees having baseline e-ALT.
文摘<strong>Introduction: </strong>The consequences of shift work on health, psychological balance and socio-family life are multiple and universally known. <strong>Objective:</strong> The aim of this survey was to describe the impact of shift work on nurses’ health and quality life. <strong>Methodology:</strong> This was a cross-sectional descriptive study of the exposed and non-exposed type from May 2013 to July 2013, <em>i.e.</em> for a period of 3 months. We had included and divided into two groups the nurses working in the various departments of the Loandjili General Hospital (LGH). A questionnaire derived from the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Scale had been used to collect the data. <strong>Results:</strong> Of the 91 nurses considered, including 59 in shift work (group I) and 32 in daytime work (group II), significant associations were found between shift work on the one hand and sleep problems on the other hand in all these aspects, stress and appetite disturbances. However, no significant association was found between shift work on the one hand and the use of sleeping pills on the other hand. Fatigue, mood disorders and the notion of free time (at home and for leisure), although the frequencies are relatively high in the group of nurses on shift work. <strong>Conclusion:</strong> Our results show that nurses’ health, social and family life at Loandjili General Hospital are negatively impacted by shift work. There is a need to put in place means of prevention.
文摘Objective:The aim of the study was to evaluate the quality of sleep in nurses performing shift work in therapeutic and surgical depar tments and to establish possible relationships between level of blood pressure(BP)and quality of sleep.Methods:A total of 20 nurses of the therapeutic depar tments and 20 nurses of the surgical depar tments were enrolled in the study.Sleep quality was assessed using the Pittsburgh Sleep Quality Index(PSQI).BP was measured according to the standard protocol using the Korotkoff method;a sphygmomanometer was used for this twice with an interval of 2 min between 10:00 a.m.and 10:30 a.m.The average value for the 2 indicators was calculated.The diagnosis of essential ar terial hyper tension(AH)was established according to the recommendations of the European Association of Cardiology and the European Association of Hypertension(2018).Results:The overall assessment of the sleep quality of the nurses involved in shift work indicates poor sleep quality;this was true in respondents of both the surgical and therapeutic profiles.However,it was observed that the quality of sleep was significantly lower in nurses of the therapeutic departments.Moreover,poor sleep quality was associated with AH,which was diagnosed in 65%of the nurses of the therapeutic departments and 45%of the nurses of the surgical departments,that is,in almost all of the subjects.Herewith,in the nurses of the therapeutic departments,the level of systolic BP exceeded that of the nurses of the surgical departments.Conclusions:Poor sleep quality is a significant risk factor for AH development and is relevant to nurses performing shift work.Additional clinical studies should be conducted to better understand the mechanisms underlying such adverse cardiometabolic outcomes associated with sleep disorders in the health-sector shift workers.
文摘Objectives: The aim of this study was to compare nutrients intake, anthropometric, biochemical and psychiatric indices between shift working and day-time nurses. Methods: A cross-sectional comparative study was conducted in which ninety eight female nurses (55 day-time workers and 43 shift workers) from six educational hospitals of Jondi-Shapour University of medical sciences, Ahvaz, Iran were participated. A questionnaire including dietary, anthropometric, disease history and lifestyle pattern questions was completed and 3-day 24-hour recalls, Beck Depression Inventory (BDI) and Hospital Anxiety and Depression Scale (HADS) were collected. Serum hs-CRP and 25(OH)D3 concentrations were measured by immunoturbidimetric and electrochemiluminescent immunoassay method, respectively. Anthropometric indices were measured according to World health organization standard protocol. Independent sample t and chi-square tests were used for statistical analysis. Results: There was a lower dietary intake of thiamin, riboflavin, niacin, folate, magnesium and iron in shift worker compared with day-time nurses (p < 0.05). No significant differences in serum hs-CRP concentrations, serum 25(OH)D3 levels, vitamin D deficiency percentage, hemoglobin and hematocrite concentrations, and also anthropometric and psychiatric variables were found between two groups. Duration of exposure to sunlight was significantly higher in shift workers than in day time nurses. Engagement time in weekly physical exercise was around 11 times greater in day-time nurses compared with the shift work nurses (p = 0.001). Conclusions: This study showed that shift working is associated with some nutritional deficiencies and sedentary lifestyle among female nurses.
文摘Objective:To examine the association between sleep characteristics and night shift work and the risk of polycystic ovary syndrome(PCOS)in Chinese women and to investigate their relationship with infertility in PCOS.Methods:From March 21,2021 to April 31,2021,3927 Chinese women with or without PCOS were recruited online.All participants completed WeChat-based electronic questionnaires.Sleep characteristics were measured using the Pittsburgh sleep quality index.Results:A total of 2871 women were included in the final analysis.Sleep duration(odds ratio[OR],0.857;95%confidence interval[CI],0.763-0.963),sleep midpoint(OR,1.142;95%CI,1.049-1.244),sleep disturbance(OR,1.320;95%CI,0.957-1.146),daytime dysfunction(OR,1.136;95%CI,1.030-1.253),and night shift work(OR,1.628;95%CI,1.264-2.097)were associated with a higher risk of PCOS.After adjusting for confounders,including age,body mass index,smoking status,and coffee and tea drinking status,sleep disturbance(OR,1.314;95%CI,1.111-1.555),daytime dysfunction(OR,1.143;95%CI,1.034-1.264),and night shift work(OR,1.800;95%CI,1.388-2.333)remained associated.In addition,sleep disturbance(OR,1.887;95%CI,1.400-2.542)and subjective sleep quality(OR,1.299;95%CI,1.037-1.627)were associated with infertility in women with PCOS,and sleep disturbance(OR,1.750;95%CI,1.281-2.390)remained significant after adjusting for confounders.Conclusions:Sleep disturbance,daytime dysfunction,and night shift work are significantly associated with PCOS.Screening for sleep disturbances and providing appropriate treatment could be potential strategies for managing PCOS and its long-term complications.
文摘Purpose: To investigate the relationship between stress, fatigue and sleep quality among shift work nurses in Japan. Design: A descriptive correlation design using self-administered surveys. Methods: Questionnaires on stress, fatigue and sleep quality (the Pittsburgh Sleep Quality Index;PSQI-J) among shift work nurses were distributed to 653 nurses in Japan from January 2015 to February 2015. Results: Participants who reported higher levels of fatigue reported higher levels of stress (r = 0.774, p = 0.000), lower levels of sleep satisfaction (r = −0.411, p = 0.000) and overall lower levels of health (r = −0.323, p = 0.000).PSQI scores were also significantly correlated with reported levels of stress (r = 0.294, p = 0.000), fatigue (r = 0.291, p = 0.000) and levels of health (r = −0.370, p = 0.000). Nurses who have stress-relieving recourses were younger (t = −2.842, p = 0.005), reported higher levels of overall health (t = 2.727, p = 0.007), had higher levels of sleep quality measured by the PSQI (t = −2.560, p = 0.011), and required less time to fall asleep (t = −3.207, p = 0.001). Conclusions: This study showed an association between stress and sleep satisfaction among shift work nurses in Japan. In addition, nurses that engage in activities to manage stress might achieve higher levels of health and high sleep quality.
基金Open Access funding enabled and organized by CAUL and its Member Institutionsfunded solely by the Australian Government Research Training Program。
文摘Purpose To assess the effect of a 12 week resistance or aerobic training intervention on markers of cardio-metabolic func-tion and sleep among male rotational shift workers.Method Thirty-eight sedentary,apparently healthy,male rotational shift workers were recruited and randomly allocated to a non-exercise control(CON)group,3 sessions/week of moderate intensity continuous(MICT),or resistance training(RT)for 12 weeks in a semi-supervised setting.Pre-and post-testing assessed markers of cardio-metabolic function including peak oxygen uptake(VO2peak),glucose metabolism,insulin sensitivity,body composition,inflammatory markers,and 14 day actigraphy sleep assessment.Results Mean session attendance across the intervention was 25(±7)of a possible 36 sessions.A significant group by time interaction was observed for MICT,with lower c-reactive protein(CRP)values observed post-training(P=0.049).A significant effect for time was observed for both MICT(n=9;P=0.04)and RT(n=10;P=0.021),increasing total sleep time(TST)following a night shift post-intervention.Data redistribution regarding exercise adherence:<24(N-ADHERE)or≥24(ADHERE)resulted in significant pre-to-post reduction in body fat(P=0.024)and fat mass percentage(P=0.014)among ADHERE.No differences were observed for any intervention group on insulin sensitivity,glucose metabolism or oxygen uptake.Conclusion The results of the current study support exercise as a valid intervention to improve the cardio-metabolic health of rotational shift workers.Average sessional attendance suggests shift workers face barriers to exercise that may need to be addressed to improve health outcomes.
基金the Australian Government Research Training Program.
文摘Purpose To assess the acute effect of moderate and high-intensity exercise on markers of cardio-metabolic function among rotational shift workers.Methods Sedentary men(n=26,age:38±8 years;BMI:32.2±6.0 kg/m^(2),VO_(2peak)32.6±6.7 mL/kg/min)employed in rotational shift work were recruited and underwent objectively assessed sleep quality(~7 days actigraphy)prior to reporting for laboratory testing.Baseline venous blood was collected to analyse fasted glucose,insulin and inflammatory cytokines tumor necrosis factor(TNF)-α,interleukin(IL)-6 and IL-1 receptor antagonist(IL-1Ra).Participants were randomly allo-cated a 30 min cycling intervention of either high intensity interval training(HIIT):1:4 ratio of 60 s at 100%and 240 s at 50%VO_(2peak),or moderate intensity continuous training(MICT);continuous cycling at 60%VO_(2peak).Fasted venous blood was collected post intervention(0,30,60 min)before subsequent night’s sleep was assessed via actigraphy.Results HIIT(P<0.016)and MICT(P<0.016)significantly increased IL-1Ra immediately and 30 min post exercise.Significantly decreased wake after sleep onset(WASO)were observed following MICT(P<0.05).No significant changes were observed for supplementary sleep variables,insulin sensitivity,IL-6 or TNF-αfor either intervention group(P>0.05).Conclusion High-and moderate-intensity exercise acutely increase anti-inflammatory markers post exercise and MICT significantly reduces sleep fragmentation in rotational shift workers.Results which are associated with improved cardio-metabolic function and indicate the potential validity of exercise as an intervention to offset the hypothesised adverse health effects of rotational shift work.
基金Sponsored by National Natural Science Foundation of China(51205336)Fujian Natural Science Foundation of China(2013J05086)
文摘Considering the effect of work roll shifting on roll temperature field,a finite difference method of PR format for roll temperature field was presented,which can meet the requirements of accuracy and speed of online calculation.The step-by-step accumulation method was used to simulate the roll temperature field and thermal crown,and the evolution of roll thermal crown in a rolling campaign was studied.And then,the effects of strip width,rolling rhythm and work roll shifting on roll thermal crown were analyzed.It is found that work roll shifting can disperse the thermal expansion of the roll body especially the edge to make roll thermal contour uniform.The effect of work roll shifting on roll thermal crown is mainly concentrated in regions around twice of roll shifting stroke,and the change range of roll thermal crown is±30μm or so in the same roll body location.
文摘Aiming at decreasing the hub transportation costs, a railway hub shift working plan in terms of multicommodity network flow model is set up for considering the coordination of freight working,train working and locomotive working plans.The solution and the calculating results are also introduced.
基金supported by Japan Society for the Promotion of Science,Grants-in-Aid for Scientific Research[grant number 23K09804]The JSPS has had any roles in the survey's design,implementation,and analysis.
文摘Objectives:Newly graduated nurses commence night shifts during a phase of heightened vulnerability to reality shock,exacerbating the challenges faced by these graduates.Therefore,this study aimed to identify the challenges experienced by newly graduated nurses when undertaking night shifts in order to help identify a strategy for supporting their adaptation to these shifts.Methods:Semi-structured personal interviews were used to collect data.Fifteen newly graduated nurses were selected to participate in the study by purposive sampling method from November 2021 to March 2022 in one of four general hospitals situated in the southwestern region of Japan.Semi-structured interviews were analyzed by using thematic analysis.Results:The analysis revealedfive central themes and nine subthemes:challenges in task efficiency(task organization challenges,challenges in time-constrained task performance),challenges in responding to patients’changing conditions(challenges in responding to patients’irregular conditions,challenges in responding to nighttime changes in patients’behaviors),challenges in independent practice(challenges in engaging in independent nursing practice,challenges in dealing with unexpected events),challenges in establishing collaborative relationships(challenges in working closely with other staff,challenges in establishing collaborative relationships during night shifts with limited resources),challenges in adapting to shift work(challenges in managing physical conditions for shift work).Conclusions:Newly graduated nurses often encounter challenges in performing their tasks during the transition period.When working night shifts,they face additional hurdles unique to nocturnal duties.Thefindings underscore the necessity for these graduates to develop night shift-specific readiness to effectively navigate the demands inherent in such work schedules.
基金Item Sponsored by National Natural Science Foundation of China(50974039)
文摘An optimization solution to roll shifting strategy for alternately rolling campaign is presented. All the strips in a rolling campaign are divided into narrow strips and wide ones, and shifting position of narrow strips is obtained by the recursive method, and then shifting position of wide strips is optimized by NSGA-II which is a multiobjective genetic algorithm. For wide strips, a multi-objective optimization model of roll shifting strategy is pro posed, which takes 3 wear contour factors including edge smoothness, body smoothness and edge drop as optimization objectives. The Pareto optimal front of roll shifting strategy can be gained quickly by NSGA-II, which suggests a series of alternative solutions to roll shifting strategy. Analysis shows that the conflict exists among the 3 objectives. The final optimal solution is selected from the Pareto optimal solutions by the weighted-sum decision-making method. Industrial production proves the validity of the solution, and it can improve strip profile of alternately rolling, reduce strip edge wave, and extend the rolling miles of rolling campaigns.
基金Project(50974039) supported by the National Natural Science Foundation of China
文摘A new roll shifting strategy with varying stroke and varying step was investigated,Two characteristic parameters including cat ear height and gap contour smoothness were introduced to assess the effect of shifting strategy on roll wear,and the relation between characteristic parameters and shifting strategy was established.Both varying stroke and varying step can reduce cat ear height and gap contour smoothness,so the shifting strategy with varying stroke and varying step is better than the one with either varying stroke or varying step,Based on the effect of shifting control parameters on characteristic parameters of roll wear,the selection principle of these shifting control parameters was gained.A case study was conducted to validate the proposed roll shifting strategy,reducing uncontrollable quartic loading gap contour,improving strip profile and extending rolling length of a rolling campaign.
文摘day work and shift work) and cigarette smoking in Japanese workers. We used data of 3,238 men (39.3 ± 10.5 years) and 5,111 women (37.1 ± 10.9 years), aged 20 - 59 years, by cross-sectional clinical investigation study. Work style i.e. day work and shift work, cigarette smoking, status of stress and stress coping were obtained by questionnaires by well-trained medical staff. A total of 227 men (7.0%) and 339 women (6.6%) were shift workers, and 1346 men (41.6%) and 649 women (12.7%) were current smokers. Work style was significantly linked to cigarette smoking, stress and stress coping after adjusting for age in women. In addition, the level of stress coping in subjects with cigarette smoking was significantly lower than that in subjects without cigarette smoking even after adjusting for age in women. However, these associations were not noted in men. Work style was critically associated with cigarette smoking in Japanese female workers.
文摘Prolonged night shift is associated with high burnout rate, but the physiological effects of a 16 h shift remain undetermined. Here we evaluated fatigue and stress via salivary assays to determine the correlation between stress and fatigue and prolonged night shifts. Twenty-five nurses (9 men, 16 women;16 h night shift (n = 13), 8 h day shift (n = 12)) from Juntendo University Koshigaya Hospital were evaluated for four consecutive workdays separated by off days. Salivary samples were collected upon waking and before sleep on non-working days, before and after the day and night shifts, and before and after the break during the nocturnal schedule, and analyzed for levels of cortisol, chromogranin A, α-amylase activity and secretory immunoglobulin A (sIgA). On non-working days, cortisol levels showed similar kinetic pattern in both nurses. On working days, day-time nurses’ cortisol levels showed normal circadian pattern throughout the shift. Night nurses’ cortisol levels at the beginning of the shift were comparable to that of the normal morning elevation. α-Amylase activity in the night shift nurses was higher than day shift nurses through each period. No significant differences in chromogranin A and sIgA levels were detected between day and night shift workers. A 16 h night shift may cause marked circadian misalignment in cortisol levels.
文摘This editorial explores the significant cardiometabolic outcomes of nocturnal sentry duty and its broader implications for other professions with overnight work.Highlighting the paradox of essential nighttime labor and its adverse physiological effects,we discuss how occupations like healthcare,hospitality,and emergency services are similarly affected.The study by Lin et al provides critical insights into these dynamics and lays the groundwork for understanding nocturnal duty’s multifaceted impact on human health.
