Etudes comparées des rythmes circadiens et reflet actimétrique du sommeil de sportifs et de sédentaires en poste régulier de nuit

2003 ◽  
Vol 28 (6) ◽  
pp. 831-887 ◽  
Author(s):  
Benoît Mauvieux ◽  
Laurent Gouthière ◽  
Bruno Sesboüe ◽  
Damien Davenne
Keyword(s):  
Circadian Rhythm ◽  
Circadian Rhythms ◽  
Sleep Quality ◽  
Shift Work ◽  
Physical Training ◽  
Night Shift ◽  
Circadian Variation ◽  
Night Work ◽  
Sedentary Subjects

The aim of this study was to show the resistance and persistence of the circadian rhythm of temperature (T°) and the sleep quality of athletic subjects and sedentary subjects engaged in night work, and attempt to explain the mechanisms that influence these differences. The effects of night work on biological rhythms have been studied extensively in the past few years. The contradictory situations for the night workers irrefutably affect their biological systems. Individuals with high amplitudes in their circadian rhythms have been found to be more tolerant to shift work and this results in a greater stability of circadian rhythms. This seems beneficial in coping with frequent rhythm disturbances. The physical training program seems to improve several mechanisms of the human biological system: amplitudes of circadian rhythms were increased and the circadian rhythm period was more resistant to an environment extreme (night work, shift work, sleep deprivation, or jet lag). To test this hypothesis, athletes and sedentary subjects who were engaged in regular night work were selected in the PSA Peugeot Citroën Automobiles Group in French Normandy country. The circadian rhythm of the T° for both groups was studied with a specific methodology and with extensive spectral analysis, especially the spectral elliptic inverse method. Study models of the rhythm of the T° were determined and the characteristic parameters were exposed. A complementary actigraphic study showed the physical training program's effects on the sleep quality. The results revealed a large stability in the rhythm of circadian variation of T° for the athletes: the amplitude was still large but for the sedentary subjects the amplitude of the T° decreased and it was difficult to adjust a period on the rhythm of T°. The stability and persistent quality of the athletes' circadian rhythm was confirmed. We observed that the actigraphic sleep was greater for athletes than for sedentary subjects, and the acrophase time for the athletes was later than for the sedentary subjects during the night shift. Key words: circadian rhythm of temperature, actimetry, sleep quality, exercise, night work, methodology of rhythms analysis

scholarly journals Association between night-shift work, sleep quality and health-related quality of life: a cross-sectional study among manufacturing workers in a middle-income setting

BMJ Open ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. e034455
Author(s):  
Yin Cheng Lim ◽  
Victor C. W. Hoe ◽  
Azlan Darus ◽  
Nirmala Bhoo-Pathy
Keyword(s):  
Sleep Quality ◽  
Shift Work ◽  
Indirect Effect ◽  
Sleep Disturbances ◽  
Night Shift ◽  
Well Being ◽  
Cross Sectional ◽  
Shift Workers ◽  
Night Shift Work

ObjectivesNight-shift work may adversely affect health. This study aimed to determine the impact of night-shift work on health-related quality of life (HRQoL), and to assess whether sleep quality was a mediating factor.DesignA cross-sectional study.Setting11 manufacturing factories in Malaysia.Participants177 night-shift workers aged 40–65 years old were compared with 317 non-night-shift workers.Primary and secondary outcomesParticipants completed a self-administered questionnaire on socio-demographics and lifestyle factors, 12-item Short Form Health Survey V.2 (SF-12v2) and the Pittsburgh Sleep Quality Index (PSQI). The Baron and Kenny’s method, Sobel test and multiple mediation model with bootstrapping were applied to determine whether PSQI score or its components mediated the association between night-shift work and HRQoL.ResultsNight-shift work was associated with sleep impairment and HRQoL. Night-shift workers had significantly lower mean scores in all the eight SF-12 domains (p<0.001). Compared with non-night-shift workers, night-shift workers were significantly more likely to report poorer sleep quality, longer sleep latency, shorter sleep duration, sleep disturbances and daytime dysfunction (p<0.001). Mediation analyses showed that PSQI global score mediated the association between night-shift work and HRQoL. ‘Subjective sleep quality’ (indirect effect=−0.24, SE=0.14 and bias corrected (BC) 95% CI −0.58 to −0.01) and ‘sleep disturbances’ (indirect effect=−0.79, SE=0.22 and BC 95% CI −1.30 to −0.42) were mediators for the association between night-shift work and physical well-being, whereas ‘sleep latency’ (indirect effect=−0.51, SE=0.21 and BC 95% CI −1.02 to −0.16) and ‘daytime dysfunction’ (indirect effect=−1.11, SE=0.32 and BC 95% CI −1.86 to −0.58) were mediators with respect to mental well-being.ConclusionSleep quality partially explains the association between night-shift work and poorer HRQoL. Organisations should treat the sleep quality of night-shift workers as a top priority area for action to improve their employees’ overall wellbeing.

scholarly journals Association between sleep quality and quality of life in nursing professionals working rotating shifts

2014 ◽  
Vol 48 (4) ◽  
pp. 594-601 ◽  
Author(s):  
Valéria de Castilho Palhares ◽  
José Eduardo Corrente ◽  
Beatriz Bojikian Matsubara
Keyword(s):  
Quality Of Life ◽  
Sleep Quality ◽  
Sleep Disturbance ◽  
Shift Work ◽  
Night Shift ◽  
Standard Form ◽  
Categorical Variables ◽  
Night Shift Work ◽  
Nursing Professionals

OBJECTIVE To analyze the association between sleep quality and quality of life of nursing professionals according to their work schedules.METHODS A prospective, cross-sectional, observational study was conducted between January and December 2010, with 264 nursing professionals, drawn from 989 subjects at Botucatu General Hospital and stratified by professional category. The Pittsburg Sleep Quality Index and the WHOQOL-bref were administered to evaluate sleep quality and quality of life, respectively. Self-reported demographic data were collected with a standard form. Continuous variables were reported as means and standard deviations, and categorical variables were expressed as proportions. Associations were evaluated using Spearman’s correlation coefficient. The association of night-shift work and gender with sleep disturbance was evaluated by logistic regression analysis using a model adjusted for age and considering sleep disturbance the dependent variable. The level of significance was p < 0.05.RESULTS Night-shift work was associated with severe worsening of at least one component of sleep quality in the model adjusted for age (OR = 1.91; 95%CI 1.04;3.50; p = 0.036). Female gender was associated with sleep disturbance (OR = 3.40; 95%CI 1.37;8.40; p = 0.008). Quality of life and quality of sleep were closely correlated (R = -0.56; p < 0.001).CONCLUSIONS Characteristics of the nursing profession affect sleep quality and quality of life, and these two variables are associated.

scholarly journals Night shift work, sleep quality and risk of endocrine-related cancer: a systematic review

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
L Ling ◽  
S Shah ◽  
J Hussain ◽  
S Stranges ◽  
K Anderson
Keyword(s):  
Public Health ◽  
Systematic Review ◽  
Circadian Rhythm ◽  
Sleep Quality ◽  
Cancer Prevention ◽  
Shift Work ◽  
Current Literature ◽  
Night Shift ◽  
Population Level ◽  
Night Shift Work

Abstract Background Cancer is a major public health concern as it is a leading cause of death worldwide. The risk of endocrine-related cancers may be associated with suboptimal sleep quality due to disruptions in circadian rhythm. However, the extent of this relationship is not clear and warrants a review summarizing recent research findings. This systematic review aims to provide an updated summary of the literature surrounding the association between night shift work, sleep quality, circadian rhythm disruption and the risk of endocrine-related cancers. Methods MEDLINE, EMBASE, CINAHL, and Web of Science databases have been searched for related cohort, case-control, and cross-sectional studies. The search was limited to studies published in English, after the year 2000. Non peer-reviewed literature and randomized control trials, were excluded. Reviewers will independently extract data on study characteristics, sleep quality measures, circadian rhythm measures, cancer diagnosis, and outcome measures. Risk of bias assessment will be performed using the CLARITY tools. Results Data synthesis is ongoing. Associations between sleep quality, night shift work, circadian disruption and risk of endocrine-related cancer will be summarized and risk estimates will be reported for four endocrine-related cancers: breast, prostate, thyroid, ovarian, and endometrial cancer. If data are available, subgroup analyses will be carried out by cancer type, study design, and age group. Conclusions This review qualitatively synthesizes current literature to determine the extent of the association between sleep quality, night shift work, circadian rhythm disruption and the risk of endocrine-related cancers. These findings can contribute to population-level cancer prevention efforts and aid public health promotion of healthier sleep-related behaviours. Key messages The relationship between sleep quality and endocrine-related cancers should be explored further in public health research due to inconclusive evidence from current literature. The findings of this project can help promote healthy sleep behaviours and population-level cancer prevention.

scholarly journals Munkarendek a hazai egészségügyi rendszerben, és az ápolók alvásminősége

2016 ◽  
Vol 157 (10) ◽  
pp. 379-384 ◽  
Author(s):  
Katalin Fusz ◽  
Annamária Pakai ◽  
Zsuzsanna Kívés ◽  
Szilvia Szunomár ◽  
Annamária Regős ◽  
...  
Keyword(s):  
Sleep Quality ◽  
Shift Work ◽  
Sleep Disturbances ◽  
Online Survey ◽  
Night Shift ◽  
Work Schedules ◽  
Nurse Shortage ◽  
System P ◽  
The University

Introduction: One way of ensuring the continuity of health care is the shift work, which is burdensome and it can lead to sleep disturbances. Aim: The aim of the study was to measure the typical Hungarian nursing shift systems in hospitals, to analyse the causes of irregular work schedules, and to compare the sleep quality of nurses in different work schedules. Method: 236 head nurses filled out the national online survey, and 217 nurses in clinics of the University of Pécs filled the Hungarian version of Bergen Shift Work Sleep Questionnaire. Results: The head nurses provided data of 8697 nurses’s schedules. 51.89% of nurses work in flexible shift system. 1944 employees work in regular shift system, most of them in the following order: 12-hour day shift and 12-hour night shift, followed by a one- or two-day rest. Where there is no system of shifts, the most frequent causes are the needs of nurses and the nurse shortage. Nurses who are working in irregular shift system had worse sleep quality than nurses who are working in flexible and regular shift system (p = 0.044). Conclusions: It would be helpful if the least burdensome shift system could be established. Orv. Hetil., 2016, 157(10), 379–384.

Circadian performance rhythms: some practical and theoretical implications

1990 ◽  
Vol 327 (1241) ◽  
pp. 543-553 ◽  
Keyword(s):  
Circadian Rhythms ◽  
Shift Work ◽  
Night Shift ◽  
Sleep Time ◽  
Task Demands ◽  
Night Work ◽  
Sleep Timing ◽  
Physiological Processes ◽  
Endogenous Component ◽  
Diurnal Species

Safety and productivity are low at night and this would appear to be because we are a diurnal species. This is reflected not only in our habitual sleep time, but also in our endogenous body clocks that, together with exogenous influences, such as the patterning of meals and activity, result in predictable circadian (24 h) rhythms in our physiological processes. Our performance capabilities also vary over the course of our waking period, with task demands affecting both the precise trend over the day, and the rate at which it adjusts to the changes in sleep timing occasioned by shift work. Studies designed to examine the reasons for this have shown that memory loaded performance may have a quite separate endogenous component to that responsible for more simple performance, suggesting that these two types of performance cannot be causally related. Furthermore, it would appear that the exogenous component of circadian rhythms may also differ across measures, and our attempts to model these endogenous and exogenous components have led us to re-examine the evidence on adjustment to night work. Our findings suggest that shiftworkers merely ‘stay up late’ on the night shift, rather than adjust to it, and that this is responsible for the reduced safety at night. It would seem that in situations where safety is paramount, the only solution to these problems is the creation of a nocturnal sub-society that not only always works at night but also remains on a nocturnal routine on rest days.

scholarly journals Circadian Rhythm Disorders and Corresponding Functional Brain Abnormalities in Young Female Nurses: A Preliminary Study

2021 ◽  
Vol 12 ◽  
Author(s):  
Xiaoli Wu ◽  
Fan Bai ◽  
Yunlei Wang ◽  
Lu Zhang ◽  
Lixu Liu ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Sleep Quality ◽  
Shift Work ◽  
Resting State ◽  
Night Shift ◽  
Cerebellar Hemisphere ◽  
Melatonin Level ◽  
Functional Brain ◽  
The Right ◽  
Circadian Rhythm Disorders

Objective: Shift work is associated with a decrease in melatonin level and perturbation of the circadian rhythm; however, it is unknown if these lead to functional brain changes. In this study, we investigated whether circadian rhythm disorders caused by shift work are related to changes in brain functional connectivity (FC) and regional homogeneity (ReHo) using whole-brain resting-state functional magnetic resonance imaging (fMRI).Methods: This prospective case-control study included nine female night shift nurses and nine age-matched female day work nurses with normal sleep rhythms. To assess sleep quality and mood, participants were asked to complete questionnaires. Serum melatonin and cortisol levels were measured. ReHo of whole-brain resting-state function and seed-based FC of the bilateral hypothalamus were compared between groups. Variables that differed significantly between groups were used to examine the association between questionnaire scores and hormone levels and fMRI data.Results: The night shift nurses had significantly lower sleep quality and melatonin levels; lower ReHo activation in the bilateral cerebellar hemisphere and higher ReHo in the bilateral occipital lobe and left parietal lobe; and higher FC from the hypothalamus to the right cingulate gyrus, right putamen, and vermis than did the day shift nurses. Activation of the right cerebellar hemisphere left superior parietal gyrus, and the right superior occipital gyrus was correlated with sleep quality scores. Moreover, activation of the right cerebellar hemisphere (r = 0.583, P = 0.011) was correlated with melatonin levels, and higher sleepiness scores were associated with stronger FC between the hypothalamus and vermis (r = 0.501, P = 0.034).Conclusions: Circadian rhythm disorder caused by night shift work can lead to a decrease in sleep quality and melatonin level, as well as a series of changes in brain FC and ReHo.

scholarly journals Influências do trabalho noturno no sono dos trabalhadores de enfermagem: revisão integrativa

2019 ◽  
Vol 81 (19) ◽  
Author(s):  
Bruna Karen Cavalcante Fernandes ◽  
Adna Cynthya Muniz Ribeiro ◽  
Cintia Lira Borges ◽  
Francisca Tereza de Galiza ◽  
Emanuella Silva Joventino ◽  
...  
Keyword(s):  
Sleep Quality ◽  
Night Shift ◽  
Time Frame ◽  
Health Sciences ◽  
Night Work ◽  
Free Access ◽  
The Subject ◽  
Night Shifts ◽  
Quality Of Nursing

Objetiva-se identificar as influências do trabalho noturno no sono dos trabalhadores de enfermagem. Trata-se deuma revisão integrativa, realizada em outubro de 2015, nas Bases de dados: Literatura Latino-Americana e do Caribeem Ciências da Saúde (LILACS), Literatura Internacional em Ciências da Saúde (MEDLINE) and Banco de Dados deEnfermagem (BDENF), utilizando os Descritores em Ciências da Saúde: Sono; Enfermagem e Trabalho noturno. Foramincluídos artigos sobre a temática; de livre acesso; nos idiomas: inglês, português e espanhol; publicados na íntegra.Não houve recorte temporal. A amostra foi constituída de 13 artigos. Emergiram duas principais categorias: Qualidade dosono dos trabalhadores de enfermagem do turno noturno; e Repercussões do trabalho noturno na saúde do trabalhadorde enfermagem. Concluí-se que o trabalho noturno tem influência direta e indireta sobre a saúde do profissional,pois trabalhar no sentido inverso ao funcionamento fisiológico do organismo pode levar a alterações como distúrbiospsíquicos, cardiovasculares e gastrintestinais.Palavras-chave: Enfermagem; Sono; Trabalho Noturno; Saúde do Trabalhador. ABSTRACTThe aim is to identify the influences of night work in the sleep of nursing staff. This is an integrative review heldin October 2015, in databases: Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS), LiteraturaInternacional em Ciências da Saúde (MEDLINE) and Banco de Dados de Enfermagem (BDENF) using the Descriptorsin Health Sciences: Sleep; Nursing and night work. They included articles on the subject; free access; in thelanguages: English, Portuguese and Spanish; published in full. There was no time frame. The sample consisted of13 articles. Emerged two main categories: sleep quality of nursing workers in the night shift; and Repercussionsof night work on the health of nursing workers. It concludes that night shifts have direct and indirect influenceon the health of the professional, since working in the opposite direction to the physiological functioning of theorganism can lead to alterations such as psychic, cardiovascular and gastrointestinal disorders.Keywords: Nursing; Sleep; Night Shift; Worker’s health.

scholarly journals Effect of work schedule on prospective antidepressant prescriptions in Sweden: a 2-year sex-stratified analysis using national drug registry data

BMJ Open ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. e023247 ◽  
Author(s):  
Amy L Hall ◽  
Göran Kecklund ◽  
Constanze Leineweber ◽  
Philip Tucker
Keyword(s):  
Shift Work ◽  
Anatomical Therapeutic Chemical ◽  
Night Shift ◽  
Primary Outcome Measure ◽  
Night Work ◽  
Registry Data ◽  
Chemical System ◽  
Future Research ◽  
Work Schedule ◽  
Drug Register

IntroductionDepression-related mood disorders affect millions of people worldwide and contribute to substantial morbidity and disability, yet little is known about the effects of work scheduling on depression. This study used a large Swedish survey to prospectively examine the effects of work schedule on registry-based antidepressant prescriptions in females and males over a 2-year period.MethodsThe study was based on an approximately representative sample (n=3980 males, 4663 females) of gainfully employed participants in the Swedish Longitudinal Occupational Survey of Health. Sex-stratified analyses were conducted using logistic regression. For exposure, eight categories described work schedule in 2008: ‘regular days’ (three categories of night work history: none, ≤3 years, 4+ years), ‘night shift work’, ‘regular shift work (no nights)’, ‘rostered work (no nights)’, ‘flexible/non-regulated hours’ and ‘other’. For the primary outcome measure, all prescriptions coded N06A according to the Anatomical Therapeutic Chemical System were obtained from the Swedish National Prescribed Drug Register and dichotomised into ‘any’ or ‘no’ prescriptions between 2008 and 2010. Estimates were adjusted for potential sociodemographic, health and work confounders, and for prior depressive symptoms.ResultsIn 2008, 22% of females versus 19% of males worked outside of regular daytime schedule. Registered antidepressant prescription rates in the postsurvey period were 11.4% for females versus 5.8% for males. In fully adjusted models, females in ‘flexible/non-regulated’ schedules showed an increased OR for prospective antidepressant prescriptions (OR=2.01, 95% CI=1.08 to 3.76). In males, odds ratios were most increased in those working ‘other’ schedules (OR=1.72, 95% CI=0.75 to 3.94) and ‘Regular days with four or more years’ history of night work’ (OR=1.54, 95% CI=0.93 to 2.56).ConclusionsThis study’s findings support a relationship between work schedule and prospective antidepressant prescriptions in the Swedish workforce. Future research should continue to assess sex-stratified relationships, using detailed shift work exposure categories and objective registry data where possible.

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