Circadian Activity Rhythms and Sleep in Nurses Working Fixed 8-hr Shifts

2014 ◽  
Vol 17 (3) ◽  
pp. 348-355 ◽  
Author(s):  
Jiunn-Horng Kang ◽  
Nae-Fang Miao ◽  
Ing-Jy Tseng ◽  
Trevor Sithole ◽  
Min-Huey Chung
Keyword(s):  
Shift Work ◽  
Night Shift ◽  
Circadian Activity ◽  
Subjective Sleep Quality ◽  
Shift Workers ◽  
Activity Rhythms ◽  
Time Frequency ◽  
Subjective Sleep ◽  
Adverse Health Outcomes ◽  
Evening Shift

Shift work is associated with adverse health outcomes. The aim of this study was to explore the effects of shift work on circadian activity rhythms (CARs) and objective and subjective sleep quality in nurses. Female day-shift ( n = 16), evening-shift ( n = 6), and night-shift ( n = 13) nurses wore a wrist actigraph to monitor the activity. We used cosinor analysis and time–frequency analysis to study CARs. Night-shift nurses exhibited the lowest values of circadian rhythm amplitude, acrophase, autocorrelation, and mean of the circadian relative power (CRP), whereas evening-shift workers exhibited the greatest standard deviation of the CRP among the three shift groups. That is, night-shift nurses had less robust CARs and evening-shift nurses had greater variations in CARs compared with nurses who worked other shifts. Our results highlight the importance of assessing CARs to prevent the adverse effects of shift work on nurses’ health.

306 Circadian activity rhythms and alertness among rapid-shift work female nurses

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A122-A122
Author(s):  
Xin Zhang ◽  
Shih-Yu Lee
Keyword(s):  
Reaction Time ◽  
Shift Work ◽  
Night Shift ◽  
Circadian Activity ◽  
Activity Rhythms ◽  
Saliva Cortisol ◽  
Before And After ◽  
Shift Rotation ◽  
Fatigue Severity ◽  
Rapid Shift

Abstract Introduction Circadian rhythms play an important role in regulating sleep. Sleep disturbances are prevalent in shift-work nurses, particularly for those work in rapid-shift rotation, including night shifts and day shifts. This study aimed to: 1) describe the characters of sleep-wake index (total sleep time [TST], wake after sleep onset [WASO], circadian activity rhythms [CAR]), psychomotor vigilance test (PVT), salivary cortisol, fatigue, and activity level during 8- and 12-hour rapid-shift work nurses; and 2) compare the parameters between two different shifts. Methods This exploratory study used registered nurses (RNs) from nine intensive care units in Beijing area. 7-days consecutive wrist actigraphy data, including TST and WASO were collected. Cosiner analysis was used for computing the CAR, including amplitude and mesor. PVT and saliva cortisol were used to assess alertness level, which measured before and after shift. Self-reported fatigue severity was measured by Lee Fatigue Scale-Short Form and assessed before and after shift. Results A total of 152 RNs (12-hour, n=82; 8-hour, n=70) participated this study, with a mean age of 31.81 (SD= 6.09). Compared with the 8-hour shift nurses, the 12-hour shift nurses were significantly higher in TST (456 vs. 364 minutes), median saliva cortisol level (before day shift, 0.54 vs. 0.31), and median PVT reaction time (before night shift). However, CAR were 0.53 (SD=0.13) and 0.50 (SD=0.18) for 12-hour and 8-hour shift RNs, respectively, and indicates desynchronized CAR in both groups. Regardless shift rotation, almost three-quarters of the RNs had a 500 ms PVT reaction time. For the 12-hour and 8-hour nurses, the level of activity during day shift was similar. However, during night shift work it was significantly lower in 12-hour nurses compared to the 8-hour nurses. All RNs experienced clinical significant fatigue severity (ranged 3.78 to 8.14) regardless before or after shift work; however, the 12-hour group reported lower fatigue severity than 8-hour group. Conclusion In this study, findings revealed shift-work RNs experienced fatigue and desynchronized CAR. The TST was low and reaction time was prolonged before and after shift work. Sleep intervention should be mandatorily included in clinical continue education. Support (if any) This project was supported by Chinese National Natural Science Foundation (71603279).

scholarly journals KELELAHAN KERJA PADA OPERATOR CONTAINER CRANE DI PT. X

2019 ◽  
Vol 7 (3) ◽  
pp. 339
Author(s):  
Nesya Yulita Anindya
Keyword(s):  
Shift Work ◽  
Night Shift ◽  
Sleep Time ◽  
Shift Workers ◽  
Container Crane ◽  
Experienced Fatigue ◽  
Work Hour ◽  
Cross Tabulation ◽  
Evening Shift ◽  
Observational Descriptive Study

Fatigue that caused by working activity is a problem which every workers had already experienced it. Fatigue condition that happened on workers usually occurs differently. Fatigue that caused by working activity had some determinant factors. Container Crane operator was a job that had an important role on container handling process at PT. X. This handling process occurred 24 hours/day, and divided into 3 shift work morning, evening and night shift. Two operator operated a CC for every 8 work hour by turns. The purpose of this research was to describe fatigue that caused by working activity on CC operator at PT. X. This research was a observational descriptive study that describe work fatigue that caused by working activity and determinant factor on container crane operators. Population of this research was all 51 CC operators. Descriptive analytic showed in form of frequency, percentage, and cross tabulation. The result showed that fatigue on CC operators mostly was a low fatigue level (90.2%), and the rest (9.8%) was a medium fatigue level. Workers that experienced medium fatigue level mostly on evening shift (40%) Night shift workers tend to experienced fatigue that caused by working. Lenght of sleep time ≤6.5 hours tend to experienced fatigue caused by working.Keywords: fatigue work, operator, shift work

scholarly journals Disturbances of Autonomic Regulation of Cardiovascular System at Different Working Regimes with Night Shifts

Kardiologiia ◽  
2020 ◽  
Vol 60 (9) ◽  
pp. 62-67
Author(s):  
Yu. A. Merkulov ◽  
A. A. Pyatkov ◽  
S. G. Gorokhova ◽  
D. M. Merkulova ◽  
O. Yu. Atkov
Keyword(s):  
Shift Work ◽  
Spectral Characteristics ◽  
Night Shift ◽  
Autonomic Regulation ◽  
Total Power ◽  
Orthostatic Test ◽  
Heart Rhythm Variability ◽  
Shift Workers ◽  
Rotating Shift Work ◽  
Night Shifts

Aim        To study temporal and spectral characteristics of heart rhythm variability (HRV) in night shift workers.Materials and methods       Along with traditional risk factors, conditions of labor contribute to development of cardiovascular morbidity, including night shift work, which can be associated with disorders of the autonomic regulation detected by analysis of HRV. This study included 100 healthy men. 74 of them were engaged in shift work, including 53 men with rotating shift work, 21 men with fixed night shifts, and 26 men with day-time work. HRV was analyzed by data of 5-min electrocardiogram recording (background recording and orthostatic test).Results   Night-shift workers had decreases in total power of regulation (ТР, SDNN) and in the parasympathetic branch (HF, pNN50). Rotating night-shift workers displayed significant decreases in SDNN and pNN50 and pronounced changes in the VLF / LF / HF ratio in the orthostatic test.Conclusion            In work with night shifts, the type of autonomic regulation differs from the “standard” functioning of the autonomic nervous system (ANS). This study showed different effects of night work regimens on HRV indexes. With the rotating shift work, the ANS dysregulation was more profound and was evident by a significant decrease in the ANS total tone and parasympathetic activity (SDNN, pNN50) compared to night shifts with fixed working hours. The excessive weakening of the parasympathetic component in the passive orthostatic test can be considered as an early marker for ANS maladaptation. 

Serotonin variations and sleep disorders among shift workers. A cross-sectional study

2021 ◽  
pp. 074823372110331
Author(s):  
Rehab Shehata Abdelhady Shehata ◽  
Zeinab Ahmed Mohamed Nour ◽  
Amul Mohamed Abdelrahim Badr ◽  
Eman Mahmoud Khalifa
Keyword(s):  
Sleep Quality ◽  
Shift Work ◽  
Night Shift ◽  
Cross Sectional Study ◽  
Poor Sleep ◽  
Serotonin Level ◽  
Poor Sleep Quality ◽  
Cross Sectional ◽  
Shift Workers ◽  
Blood Serotonin

Sleep disorders are prevalent occupational health problems among shift workers, especially healthcare workers with long shifts. Serotonin is a neurotransmitter related to circadian variations accompanied by shift work. A cross-sectional study was performed on 73 nurses at a tertiary hospital in Cairo, Egypt, to assess sleep quality among shift work nurses (SWNs), to determine blood serotonin level, and its relation to shift work and sleep quality. A demographic and occupational history questionnaire, Pittsburgh Sleep Quality Index (PSQI) questionnaire, and measurement of blood serotonin were carried out to the studied group. The data were analyzed using SPSS 25, and descriptive statistics, unpaired t-test, ANOVA, Kruskal–Wallis Test, Chi-square, Spearman correlation, and multivariate regression analysis were utilized. The results showed that the mean PSQI global score was significantly higher among SWNs than non-shift work nurses (NSWNs) and was the highest (10.32 ± 3.56 and 10.22 ± 2.4, respectively) among rotatory and fixed night shift nurses. Blood serotonin showed highly significant differences between SWNs over NSWNs ( p = 0.001), and mostly reduced among rotatory and fixed night shift nurses (66.7% and 65%, respectively). Moreover, there were highly significant differences in serotonin levels between poor and good sleep quality nurses ( p < 0.001), and most of the poor sleep quality nurses (62.7%) had low serotonin levels. Abnormal serotonin level (odds = 246.5) and working years (odds = 1.2) were statistically significant predictors of poor sleep quality. In conclusion, SWNs, especially rotating and night shift nurses, suffer from poor sleep quality associated with abnormal levels of blood serotonin.

scholarly journals The Effect of Shift Work and Poor Sleep on Self-Reported Skin Conditions: A Survey of Call Center Agents in the Philippines

2019 ◽  
Vol 1 (2) ◽  
pp. 273-279 ◽  
Author(s):  
Francine Lu ◽  
Amanda Suggs ◽  
Harib Ezaldein ◽  
Jason Ya ◽  
Pingfu Fu ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Shift Work ◽  
Skin Disease ◽  
Call Center ◽  
Night Shift ◽  
The Philippines ◽  
Poor Sleep ◽  
Shift Workers ◽  
Significant Difference ◽  
Skin Conditions

Night shift workers may have a disrupted circadian rhythm, which may contribute to the development of skin disease. The purpose of this study was to determine whether there is a significant difference in the prevalence and severity of self-reported skin disease between “regular” day shift workers compared to “graveyard” night shift workers. We conducted surveys from 630 call center agents in Manila, the Philippines, and they were analyzed regarding demographics, medical history, dermatologic history, lifestyle, and sleep. No difference was found in the prevalence of skin disease between shifts. However, night shift workers were worse sleepers. When compared to good sleepers, poor sleepers had a higher prevalence of skin disease with worse severity. Graveyard shift workers with poor sleep may have increased skin disease severity.

scholarly journals O4A.5 Night shift work is associated with abnormal liver function

2019 ◽  
Vol 76 (Suppl 1) ◽  
pp. A33.2-A33
Author(s):  
Lap Ah Tse ◽  
Feng Wang ◽  
Liuzhuo Zhang ◽  
Zhimin Li
Keyword(s):  
Liver Function ◽  
Shift Work ◽  
Night Shift ◽  
Abnormal Liver Function ◽  
Baseline Survey ◽  
Shift Workers ◽  
Night Shift Work ◽  
Logistic Regression Models ◽  
Biochemical Analyzer ◽  
Stratified Analysis

ObjectiveTo examine the relationship between night shift work and elevated level of alanine transaminase (e-ALT) of workers, stratified by status of non-alcohol fatty liver.MethodsWe established a prospective cohort of night shift workers in Shenzhen, China. All 4740 male workers who had liver function data from the baseline survey of this night shift workers’ cohort were included in the current analysis. We collected information on demographics, lifestyles, and lifetime working schedule from standardized questionnaire. We examined workers’ NAFL status using liver sonography and their serum ALT levels using the automatic biochemical analyzer. Unconditional logistic regression models were used to evaluate odds ratios (ORs) and 95% confidence interval (95% CI).ResultsThis cohort contained 39.5% night shift workers. Compared with the day workers, night shift workers had higher odds of e-ALT (OR: 1.18; 95% CI 1.00–1.40). Stratified analysis showed that a positive gradient between night shift years and elevated e-ALT was only restricted to the night shift workers without NAFL. No similar trend was observed among those with NAFL.ConclusionsNight shift work is positively associated with the abnormal liver function in workers without NAFL, which indicates that shift work involving circadian disruption is likely to affect abnormal liver function.[National Natural Science Foundation of China (Project number 81273172 and 81372964), [email protected] (Lap Ah Tse)]

Relationship of work-related stress with obesity among Brazilian female shift workers

2020 ◽  
pp. 1-7
Author(s):  
Janaína Cristina da Silva ◽  
Anderson Garcez ◽  
Gabriela Herrmann Cibeira ◽  
Heloísa Theodoro ◽  
Maria Teresa Anselmo Olinto
Keyword(s):  
Shift Work ◽  
Night Shift ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Work Related Stress ◽  
Shift Workers ◽  
Night Shift Work ◽  
Work Related ◽  
Prevalence Of Obesity ◽  
Related Stress

Abstract Objectives: To explore the relationship between work-related stress and obesity among female shift workers. Additionally, we also aimed to test the interaction between shift work and work-related stress in this association. Design: A cross-sectional study was conducted among Brazilian female shift workers. Work-related stress was assessed through a demand–control questionnaire (Job Stress Scale). Work-related stress was defined by the presence of high psychological demands and low control at work. The obesity cases were defined as those with a BMI of 30 kg/m2 or more. Multivariate Poisson regression with robust variance was used to obtain the prevalence ratios (PR) and their respective 95 % CI. Setting: A group of industries located in southern Brazil in 2017. Participants: Four hundred and twenty female workers aged 18–59 years. Results: The overall prevalence of obesity was 30 % (95 % CI: 25·6, 34·4), and the presence of work-related stress was identified in 24 % (95 % CI: 19·9, 28·1) of the sample. We found an indication of interaction between work-related stress and night shift work on obesity (P = 0·026). After adjusting for confounding factors, work-related stress was associated with a 71 % greater probability of obesity (PR = 1·71; 95 % CI: 1·02, 2·87; P = 0·042) among female night shift workers. Conclusions: In this study, we revealed that exposure to work-related stress and night shift work were associated with obesity among female shift workers. Furthermore, the prevalence of obesity was high among female shift workers.

scholarly journals Circadian misalignment increases mood vulnerability in simulated shift work

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sarah L. Chellappa ◽  
Christopher J. Morris ◽  
Frank A. J. L. Scheer
Keyword(s):  
Shift Work ◽  
Night Shift ◽  
Well Being ◽  
Continuous Exposure ◽  
Shift Workers ◽  
Circadian Misalignment ◽  
Alignment Condition ◽  
Increased Risk ◽  
Mood Effects ◽  
Alignment Interaction

Abstract Night shift work can associate with an increased risk for depression. As night workers experience a ‘misalignment’ between their circadian system and daily sleep–wake behaviors, with negative health consequences, we investigated whether exposure to circadian misalignment underpins mood vulnerability in simulated shift work. We performed randomized within-subject crossover laboratory studies in non-shift workers and shift workers. Simulated night shifts were used to induce a misalignment between the endogenous circadian pacemaker and sleep/wake cycles (circadian misalignment), while environmental conditions and food intake were controlled. Circadian misalignment adversely impacted emotional state, such that mood and well-being levels were significantly decreased throughout 4 days of continuous exposure to circadian misalignment in non-shift workers, as compared to when they were under circadian alignment (interaction of “circadian alignment condition” vs. “day”, mood: p < 0.001; well-being: p < 0.001; adjusted p-values). Similarly, in shift workers, mood and well-being levels were significantly reduced throughout days of misalignment, as compared to circadian alignment (interaction of “circadian alignment condition” vs. “day”, mood: p = 0.002; well-being: p = 0.002; adjusted p-values). Our findings indicate that circadian misalignment is an important biological component for mood vulnerability, and that individuals who engage in shift work are susceptible to its deleterious mood effects.

scholarly journals Designing Light for Night Shift Workers: Application of Nonvisual Lighting Design Principles in an Industrial Production Line

2021 ◽  
Vol 11 (22) ◽  
pp. 10896
Author(s):  
Johannes Zauner ◽  
Herbert Plischke
Keyword(s):  
Shift Work ◽  
Industrial Production ◽  
Night Shift ◽  
Stimulus Range ◽  
Automation System ◽  
Shift Workers ◽  
Health And Wellbeing ◽  
Rotating Shift Work ◽  
Lighting Simulation ◽  
Night Shifts

Chronodisruption deteriorates the health and wellbeing of shift workers. Artificial light at night and the lack of light during the day are major contributors to chronodisruption and need to be optimized in shift work scenarios. Here, we present one solution for a lighting and automation system in an industrial production workplace. The setting is a rapidly rotating shift work environment with morning, evening, and night shifts. We describe a procedure to specify the new lighting through a software-agnostic nonvisual lighting simulation for artificial and daylighting scenarios. Through this process, a new luminaire is created, called Drosa, that allows for a large melanopic stimulus range between 412 and 73 lx melanopic equivalent daylight (D65) illuminance vertically at eye level, while maintaining a neutral white illuminance at task level between 1250 and 900 lx, respectively. This is possible through a combination of glare-free spotlights with adjustable areal wing lights. An individually programmed automation system controls the light dosage and timing during the day and night. The work is relevant for other shift work scenarios, where the presented example and the discussed rationale behind the automation might provide insights. The work is further relevant for other lighting scenarios beyond industrial shift work, as the nonvisual lighting simulation process can be adapted to any context.

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