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Soltanzadeh A, Eyvazlou M, Mohammad-Ghasemi M, Sadeghi-Yarandi M, Rahimkhani M, Ghasemi N, Bonyadi M, Sadeghi-Yarandi M. Investigating the relationship between shift work schedule and blood and metabolic parameters: a 10-years retrospective cohort study. Sci Rep 2024; 14:17297. [PMID: 39068300 PMCID: PMC11283525 DOI: 10.1038/s41598-024-68378-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Accepted: 07/23/2024] [Indexed: 07/30/2024] Open
Abstract
Shift work has become increasingly common in modern society. Shift work has been associated with a range of negative health outcomes. Therefore, this 10-years retrospective cohort study, aimed to investigate the relationship between shift work and blood and metabolic parameters. This retrospective cohort study was conducted in a metal parts manufacturing industry in 2023. In this study, 204 shift workers and 204 day workers were examined. All the studied blood and metabolic parameters were collected by reviewing the medical records of all participants during a 10-years period (2013-2022). Moreover, the amounts of physical, chemical, and ergonomics harmful agents in the work environment were investigated. All the collected data were analyzed using SPSS version 25.0. The values of Body Mass Index (BMI), Red Blood Cell Count (RBC), Platelets Count (PLT), Thyroid-Stimulating Hormone Level (TSH), Fasting Blood Sugar Level (FBS), Creatinine, Triglyceride (TG), Liver Enzymes level (SGOT and SGPT), and Systolic Blood Pressure (SBP) were higher among the shift work employees, and a significant difference was observed between the values of these parameters between the two groups. The results of logistic regression showed that the highest effect of shift work was observed on the parameters of FBS, TG, SGPT, TSH, Physical activity, BMI, Sleep duration, PLT, and Sleep quality with beta coefficient values of 0.49, 0.33, 0.29, 0.29, 0.20, 0.18, 0.14, 0.13 and, 0.11, respectively (p-value < 0.01). The present study contributes to a growing body of evidence that blood and metabolic factors are likely to be influenced by shift work. These findings have important implications for policy makers, highlighting the need for interventions to mitigate the negative health effects of shift work on workers.
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Affiliation(s)
- Ahmad Soltanzadeh
- Department of Occupational Health, School of Public Health, Qom University of Medical Sciences, Qom, Iran
| | - Meysam Eyvazlou
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mostafa Mohammad-Ghasemi
- Department of Environmental Science and Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Mansoureh Sadeghi-Yarandi
- Department of Counseling, Faculty of Humanities, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Monireh Rahimkhani
- Lab Medical Sciences Department, Allied Medical Sciences Faculty, Tehran University of Medical Sciences, Tehran, Iran
| | - Neda Ghasemi
- Department of Ergonomics, Faculty of Health, Yazd University of Medical Sciences, Yazd, Iran
| | - Mojdeh Bonyadi
- Clinical Research Development Center, Imam Reza Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohsen Sadeghi-Yarandi
- Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
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Gédor M, Bourgkard È, Dziurla M, Ribet C, Goldberg M, Grzebyk M, Hédelin G, Boini S. Relationship between night work and health-related quality of life: an analysis based on profiles and cumulative duration of exposure to night work among French workers in the CONSTANCES cohort. Int Arch Occup Environ Health 2024; 97:377-386. [PMID: 38466419 DOI: 10.1007/s00420-024-02053-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 01/29/2024] [Indexed: 03/13/2024]
Abstract
OBJECTIVE The aim of this study is to estimate the association between night work and health-related quality of life (HRQoL) among French workers. The association between cumulative duration of night work and HRQoL was also investigated. METHODS Three career-long night work exposure groups were defined at inclusion in the CONSTANCES cohort: permanent night workers, rotating night workers and former night workers. Day workers with no experience of night work were the reference group. HRQoL was assessed using the Short Form Health Survey (SF-12), in particular the physical component summary (PCS) and mental component summary (MCS) scores, with a higher score indicating better HRQoL. Several linear regression models were built to test the association between night work exposure and HRQoL. The relationship between cumulative duration of night work and HRQoL scores was analyzed using generalised additive models. RESULTS The sample consisted of 10,372 participants. Former night workers had a significantly lower PCS score than day workers (β [95% CI]: - 1.09 [- 1.73; - 0.45], p = 0.001), whereas permanent night workers had a significantly higher MCS score (β [95% CI]: 1.19 [0.009; 2.36], p = 0.048). A significant decrease in PCS score from 5 to 20 years of cumulative night work was observed among former night workers. CONCLUSIONS Former night workers had poorer physical HRQoL in contrast to permanent and rotating night workers who had similar or even better HRQoL than day workers, suggesting the well-known healthy worker survivor effect. Consequently, both current and former night workers require regular and specific follow-up focused on the physical components of their health.
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Affiliation(s)
- Maud Gédor
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1, Rue du Morvan, CS 60027 54519, Vandœuvre-Lès-Nancy, France.
| | - Ève Bourgkard
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1, Rue du Morvan, CS 60027 54519, Vandœuvre-Lès-Nancy, France
| | - Mathieu Dziurla
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1, Rue du Morvan, CS 60027 54519, Vandœuvre-Lès-Nancy, France
| | - Céline Ribet
- Population-Based Epidemiological Cohorts Unit, Inserm UMS 11, Université Paris Cité, Université Paris Saclay, Université de Versailles-Saint-Quentin-en-Yvelines (UVSQ), Villejuif, France
| | - Marcel Goldberg
- Population-Based Epidemiological Cohorts Unit, Inserm UMS 11, Université Paris Cité, Université Paris Saclay, Université de Versailles-Saint-Quentin-en-Yvelines (UVSQ), Villejuif, France
| | - Michel Grzebyk
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1, Rue du Morvan, CS 60027 54519, Vandœuvre-Lès-Nancy, France
| | - Guy Hédelin
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1, Rue du Morvan, CS 60027 54519, Vandœuvre-Lès-Nancy, France
| | - Stéphanie Boini
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1, Rue du Morvan, CS 60027 54519, Vandœuvre-Lès-Nancy, France
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3
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Jain N, Lehrer HM, Chin BN, Tracy EL, Evans MA, Krafty RT, Buysse DJ, Hall MH. Heart rate and heart rate variability following sleep deprivation in retired night shift workers and retired day workers. Psychophysiology 2023; 60:e14374. [PMID: 37409638 PMCID: PMC10770290 DOI: 10.1111/psyp.14374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 05/24/2023] [Accepted: 06/14/2023] [Indexed: 07/07/2023]
Abstract
Shift workers experience poor sleep and dysregulated cardiac autonomic function during sleep. However, it is unknown if this dysregulation persists into retirement, potentially accelerating the age-associated risk for adverse cardiovascular outcomes. Using sleep deprivation as a physiological challenge to cardiovascular autonomic function, we compared heart rate (HR) and high-frequency heart rate variability (HF-HRV) during baseline and recovery sleep following sleep deprivation between retired night shift and day workers. Participants were retired night shift (N = 33) and day workers (N = 37) equated on age (mean [standard deviation] = 68.0 [5.6] years), sex (47% female), race/ethnicity (86% White), and body mass index. Participants completed a 60-h lab protocol including one night of baseline polysomnography-monitored sleep, followed by 36 h of sleep deprivation and one night of recovery sleep. Continuously recorded HR was used to calculate HF-HRV. Linear mixed models compared HR and HF-HRV during non-rapid eye movement (NREM) and REM sleep between groups during baseline and recovery nights. Groups did not differ on HR or HF-HRV during NREM or REM sleep (ps > .05) and did not show differential responses to sleep deprivation. In the full sample, HR increased and HF-HRV decreased from baseline to recovery during NREM (ps < .05) and REM (ps < .01). Both groups exhibited cardiovascular autonomic changes during recovery sleep following 36 h of sleep deprivation. Sleep deprivation appears to induce cardiovascular autonomic changes that persist into recovery sleep in older adults, regardless of shift work history.
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Affiliation(s)
- Naveen Jain
- School of Medicine, University of Pittsburgh
| | | | | | | | | | - Robert T. Krafty
- Department of Biostatistics and Bioinformatics, Emory University
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Cheng WY, Desmet L, Depoortere I. Time-restricted eating for chronodisruption-related chronic diseases. Acta Physiol (Oxf) 2023; 239:e14027. [PMID: 37553828 DOI: 10.1111/apha.14027] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 07/05/2023] [Accepted: 07/26/2023] [Indexed: 08/10/2023]
Abstract
The circadian timing system enables organisms to adapt their physiology and behavior to the cyclic environmental changes including light-dark cycle or food availability. Misalignment between the endogenous circadian rhythms and external cues is known as chronodisruption and is closely associated with the development of metabolic and gastrointestinal disorders, cardiovascular diseases, and cancer. Time-restricted eating (TRE, in human) is an emerging dietary approach for weight management. Recent studies have shown that TRE or time-restricted feeding (TRF, when referring to animals) has several beneficial health effects, which, however, are not limited to weight management. This review summarizes the effects of TRE/TRF on regulating energy metabolism, gut microbiota and homeostasis, development of cardiovascular diseases and cancer. Furthermore, we will address the role of circadian clocks in TRE/TRF and propose ways to optimize TRE as a dietary strategy to obtain maximal health benefits.
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Affiliation(s)
- Wai-Yin Cheng
- Translational Research Center for Gastrointestinal Disorders, Gut Peptide Research Lab, University of Leuven, Leuven, Belgium
| | - Louis Desmet
- Translational Research Center for Gastrointestinal Disorders, Gut Peptide Research Lab, University of Leuven, Leuven, Belgium
| | - Inge Depoortere
- Translational Research Center for Gastrointestinal Disorders, Gut Peptide Research Lab, University of Leuven, Leuven, Belgium
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El-Sayed Awaad A, El-Bestar S, El-Gilany AH, Al-Wehedy A, El Hadidy SS. Cardiovascular risk factors among train drivers, Mansoura, Egypt. ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2023; 78:329-338. [PMID: 37431719 DOI: 10.1080/19338244.2023.2230119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 06/21/2023] [Indexed: 07/12/2023]
Abstract
Cardiovascular risk factors and diseases are the most prevalent health conditions in train drivers. A comparative cross-sectional study was carried out to estimate the prevalence of some cardiovascular risk factors among train drivers. A pre-designed questionnaire was used to collect socio-demographic and occupational data. Physical activity and dietary habits were assessed, psychological distress was measured. Out of 100 recruited train drivers, 62% had obesity, 46% were hypertensive, 72.8% had dyslipidemia, and 71% had mild and/or moderate level of psychological distress. Being a train driver is independently associated with the likelihood of having obesity (AOR = 14.2) and psychological distress (AOR = 6.6). The prevalence of various cardiovascular risk factors was significantly higher among train drivers than the comparison group. Being a train driver is independently associated with obesity and psychological distress.
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Affiliation(s)
- Asmaa El-Sayed Awaad
- Public Health & Community Medicine Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Sohair El-Bestar
- Public Health & Community Medicine Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Abdel-Hady El-Gilany
- Public Health & Community Medicine Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Adel Al-Wehedy
- Public Health & Community Medicine Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Samah Saleh El Hadidy
- Public Health & Community Medicine Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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6
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van de Langenberg D, Dollé MET, van Kerkhof LWM, Vermeulen RCH, Vlaanderen JJ. Effects of Nightshift Work on Blood Metabolites in Female Nurses and Paramedic Staff: A Cross-sectional Study. Ann Work Expo Health 2023; 67:694-705. [PMID: 37186247 PMCID: PMC10394501 DOI: 10.1093/annweh/wxad018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 03/16/2023] [Indexed: 05/17/2023] Open
Abstract
Nightshift work disturbs the circadian rhythm, which might contribute to the development of cardio-metabolic disorders. In this cross-sectional study, we aimed to gain insight into perturbations of disease relevant metabolic pathways due to nightshift work. We characterized the metabolic profiles of 237 female nurses and paramedic staff participating in the Klokwerk study using the Nightingale Health platform. We performed analyses on plasma levels of 225 metabolites, including cholesterol, triglycerides, fatty acids, and amino acids. Using both principal component- and univariate-regression, we compared metabolic profiles of nightshift workers to metabolic profiles from workers that did not work night shifts (defined as day workers). We also assessed whether differential effects were observed between recently started versus more experienced workers. Within the group of nightshift workers, we compared metabolic profiles measured right after a nightshift with metabolic profiles measured on a day when no nightshift work was conducted. We observed evidence for an impact of nightshift work on the presence of unfavorable fatty acid profiles in blood. Amongst the fatty acids, effects were most prominent for PUFA/FA ratios (consistently decreased) and SFA/FA ratios (consistently elevated). This pattern of less favorable fatty acid profiles was also observed in samples collected directly after a night shift. Amino acid levels (histidine, glutamine, isoleucine, and leucine) and lipoproteins (especially HDL-cholesterol, VLDL-cholesterol, and triglycerides) were elevated when comparing nightshift workers with day workers. Amino acid levels were decreased in the samples that were collected directly after working a nightshift (compared to levels in samples that were collected during a non-nightshift period). The observed effects were generally more pronounced in samples collected directly after the nightshift and among recently started compared to more experienced nightshift workers. Our finding of a suggested impact of shift work on impaired lipid metabolism is in line with evidence that links disruption of circadian rhythmicity to obesity and metabolic disorders.
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Affiliation(s)
- Daniella van de Langenberg
- IRAS, Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, the Netherlands
- RIVM, Rijksinstituut voor Volksgezondheid en Milieu (National Institute for Public Health and the Environment), Antonie van Leeuwenhoeklaan 9, 3721 MA, Bilthoven, the Netherlands
| | - Martijn E T Dollé
- RIVM, Rijksinstituut voor Volksgezondheid en Milieu (National Institute for Public Health and the Environment), Antonie van Leeuwenhoeklaan 9, 3721 MA, Bilthoven, the Netherlands
| | - Linda W M van Kerkhof
- RIVM, Rijksinstituut voor Volksgezondheid en Milieu (National Institute for Public Health and the Environment), Antonie van Leeuwenhoeklaan 9, 3721 MA, Bilthoven, the Netherlands
| | - Roel C H Vermeulen
- IRAS, Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, the Netherlands
| | - Jelle J Vlaanderen
- IRAS, Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 2, 3584 CM, Utrecht, the Netherlands
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7
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In Het Panhuis W, Schönke M, Modder M, Tom HE, Lalai RA, Pronk ACM, Streefland TCM, van Kerkhof LWM, Dollé MET, Depuydt MAC, Bot I, Vos WG, Bosmans LA, van Os BW, Lutgens E, Rensen PCN, Kooijman S. Time-restricted feeding attenuates hypercholesterolaemia and atherosclerosis development during circadian disturbance in APOE∗3-Leiden.CETP mice. EBioMedicine 2023; 93:104680. [PMID: 37356205 DOI: 10.1016/j.ebiom.2023.104680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/27/2023] Open
Abstract
BACKGROUND Circadian disturbance (CD) is the consequence of a mismatch between endogenous circadian rhythms, behaviour, and/or environmental cycles, and frequently occurs during shift work. Shift work has been associated with elevated risk for atherosclerotic cardiovascular disease (asCVD) in humans, but evidence for the effectiveness of prevention strategies is lacking. METHODS Here, we applied time-restricted feeding (TRF) as a strategy to counteract atherosclerosis development during CD in female APOE∗3-Leiden.CETP mice, a well-established model for humanized lipoprotein metabolism. Control groups were subjected to a fixed 12:12 h light-dark cycle, while CD groups were subjected to 6-h phase advancement every 3 days. Groups had either ad libitum (AL) access to food or were subjected to TRF with restricted food access to the dark phase. FINDINGS TRF did not prevent the increase in the relative abundance of circulating inflammatory monocytes and elevation of (postprandial) plasma triglycerides during CD. Nonetheless, TRF reduced atherosclerotic lesion size and prevented an elevation in macrophage content of atherosclerotic lesions during CD, while it increased the relative abundance of anti-inflammatory monocytes, prevented activation of T cells, and lowered plasma total cholesterol levels and markers of hepatic cholesterol synthesis. These effects were independent of total food intake. INTERPRETATION We propose that time restricted eating could be a promising strategy for the primary prevention of asCVD risk in shift workers, which warrants future study in humans. FUNDING This work was funded by the Novo Nordisk Foundation, the Netherlands Ministry of Social Affairs and Employment, Amsterdam Cardiovascular Sciences, and the Dutch Heart Foundation.
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Affiliation(s)
- Wietse In Het Panhuis
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Milena Schönke
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Melanie Modder
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Hannah E Tom
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Reshma A Lalai
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Amanda C M Pronk
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Trea C M Streefland
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Linda W M van Kerkhof
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Martijn E T Dollé
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Marie A C Depuydt
- Leiden Academic Centre for Drug Research, Division of Biotherapeutics, Leiden University, Leiden, the Netherlands
| | - Ilze Bot
- Leiden Academic Centre for Drug Research, Division of Biotherapeutics, Leiden University, Leiden, the Netherlands
| | - Winnie G Vos
- Department of Medical Biochemistry, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Cardiovascular Sciences, Atherosclerosis & Ischemic Syndromes, Amsterdam, the Netherlands; Amsterdam Immunity and Infection, Amsterdam, the Netherlands
| | - Laura A Bosmans
- Department of Medical Biochemistry, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Cardiovascular Sciences, Atherosclerosis & Ischemic Syndromes, Amsterdam, the Netherlands; Amsterdam Immunity and Infection, Amsterdam, the Netherlands
| | - Bram W van Os
- Department of Medical Biochemistry, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Cardiovascular Sciences, Atherosclerosis & Ischemic Syndromes, Amsterdam, the Netherlands; Amsterdam Immunity and Infection, Amsterdam, the Netherlands
| | - Esther Lutgens
- Department of Medical Biochemistry, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Cardiovascular Sciences, Atherosclerosis & Ischemic Syndromes, Amsterdam, the Netherlands; Amsterdam Immunity and Infection, Amsterdam, the Netherlands; Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA
| | - Patrick C N Rensen
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Sander Kooijman
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands.
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8
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Solymanzadeh F, Rokhafroz D, Asadizaker M, Dastoorpoor M. Prediction of risk of coronary artery disease based on the Framingham risk score in association with shift work among nurses. INTERNATIONAL JOURNAL OF OCCUPATIONAL SAFETY AND ERGONOMICS 2023; 29:56-61. [PMID: 34983313 DOI: 10.1080/10803548.2021.2024403] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Objectives. This study aimed to determine the prediction of risk of coronary artery disease (CAD) based on the Framingham risk score (FRS) in association with shift work among nurses.Methods. This cross-sectional and descriptive-analytic study was conducted with nurses working in three hospitals located in Abadan, southwest Iran. The sample size was 120 participants, divided into 60 shift workers and 60 day workers (non-shift workers). Demographic data and medical and occupational history were collected through a checklist and interviews. CAD risk assessment tools used to estimate the 10-year cardiovascular disease (CVD) risk included the FRS. Data were analysed by Mann-Whitney U test, χ2 test and one-way analysis of variance (ANOVA) using SPSS version 22.0.Results. There were statistically significant differences between blood pressure (BP), total cholesterol (TC), body mass index (BMI) and shift work (p ≤ 0.001). There was a statistically significant difference between prevalence of CAD risk and shift work based on the FRS (p = 0.04).Conclusion. The study findings showed that shift work is a risk factor for CAD disturbances. Therefore, particular follow-up of shift workers should be recommended for screening and preventing CAD.
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Affiliation(s)
- Farhad Solymanzadeh
- Nursing Care Research Center in Chronic Diseases, School of Nursing and Midwifery, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Dariush Rokhafroz
- Nursing Care Research Center in Chronic Diseases, School of Nursing and Midwifery, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Marziyeh Asadizaker
- Nursing Care Research Center in Chronic Diseases, School of Nursing and Midwifery, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Dastoorpoor
- Department of Epidemiology and Biostatistics, Menopause and Andropause Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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In Het Panhuis W, Schönke M, Siebeler R, Banen D, Pronk ACM, Streefland TCM, Afkir S, Sips HCM, Kroon J, Rensen PCN, Kooijman S. Circadian disruption impairs glucose homeostasis in male but not in female mice and is dependent on gonadal sex hormones. FASEB J 2023; 37:e22772. [PMID: 36645117 DOI: 10.1096/fj.202201586r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 12/19/2022] [Accepted: 12/29/2022] [Indexed: 01/17/2023]
Abstract
Circadian disruption (CD) is the consequence of a mismatch between endogenous circadian rhythms and behavior, and frequently occurs in shift workers. CD has often been linked to impairment of glucose and lipid homeostasis. It is, however, unknown if these effects are sex dependent. Here, we subjected male and female C57BL/6J mice to 6-h light phase advancements every 3 days to induce CD and assessed glucose and lipid homeostasis. Within this model, we studied the involvement of gonadal sex hormones by injecting mice with gonadotropin-releasing hormone-antagonist degarelix. We demonstrate that CD has sex-specific effects on glucose homeostasis, as CD elevated fasting insulin levels in male mice while increasing fasting glucose levels in female mice, which appeared to be independent of behavior, food intake, and energy expenditure. Absence of gonadal sex hormones lowered plasma insulin levels in male mice subjected to CD while it delayed glucose clearance in female mice subjected to CD. CD elevated plasma triglyceride (TG) levels and delayed plasma clearance of TG-rich lipoproteins in both sexes, coinciding with reduced TG-derived FA uptake by adipose tissues. Absence of gonadal sex hormones did not notably alter the effects of CD on lipid metabolism. We conclude that CD causes sex-dependent effects on glucose metabolism, as aggravated by male gonadal sex hormones and partly rescued by female gonadal sex hormones. Future studies on CD should consider the inclusion of both sexes, which may eventually contribute to personalized advice for shift workers.
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Affiliation(s)
- Wietse In Het Panhuis
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Milena Schönke
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Ricky Siebeler
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Dorien Banen
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Amanda C M Pronk
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Trea C M Streefland
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Salwa Afkir
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Hetty C M Sips
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Jan Kroon
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Patrick C N Rensen
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Sander Kooijman
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
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Stowe TA, McClung CA. How Does Chronobiology Contribute to the Development of Diseases in Later Life. Clin Interv Aging 2023; 18:655-666. [PMID: 37101656 PMCID: PMC10124625 DOI: 10.2147/cia.s380436] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 04/13/2023] [Indexed: 04/28/2023] Open
Abstract
An increasingly older population is one of the major social and medical challenges we currently face. Between 2010 and 2050, it is estimated that the proportion of adults over 65 years of age will double from 8% to 16% of the global population. A major concern associated with aging is the changes in health that can lead to various diseases such as cancer and neurogenerative diseases, which are major burdens on individuals and societies. Thus, it is imperative to better understand changes in sleep and circadian rhythms that accompany aging to improve the health of an older population and target diseases associated with aging. Circadian rhythms play a role in most physiological processes and can contribute to age-related diseases. Interestingly, there is a relationship between circadian rhythms and aging. For example, many older adults have a shift in chronotype, which is an individual's natural inclination to sleep certain times of the day. As adults age, most people tend to go to sleep earlier while also waking up earlier. Numerous studies also suggest that disrupted circadian rhythms may be indicative of developing age-related diseases, like neurodegenerative disorders and cancer. Better understanding the relationship between circadian rhythms and aging may allow us to improve current treatments or develop novel ones that target diseases commonly associated with aging.
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Affiliation(s)
- Taylor A Stowe
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Colleen A McClung
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Translational Neuroscience Program, Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, USA
- Correspondence: Colleen A McClung, Email
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11
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Boini S, Bourgkard E, Ferrières J, Esquirol Y. What do we know about the effect of night-shift work on cardiovascular risk factors? An umbrella review. Front Public Health 2022; 10:1034195. [PMID: 36504944 PMCID: PMC9727235 DOI: 10.3389/fpubh.2022.1034195] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 10/26/2022] [Indexed: 11/24/2022] Open
Abstract
Objective To evaluate the existing evidence on the effect of night-shift work and its subtypes (permanent and rotating) on cardiovascular risk factors: diabetes, lipid disorders, being overweight, hypertension, smoking habits, sedentariness, and occupational psychosocial stressors. Method A Web of Sciences and Cochrane review library search was conducted to identify systematic reviews with or without meta-analysis dealing with the quantification of the link between night-shift work and the studied cardiovascular risk factors in working populations. We used the AMSTAR 2 to evaluate the quality of each review. The main results of the included systematic reviews were compiled in a summary structured around the different cardiovascular risk factors. Results After selection, 33 systematic reviews were included: nine for diabetes, four for lipid disorders, nine for being overweight, four for hypertension, two for smoking habits, three for occupational psychosocial stressors and two for sedentariness. The results confirmed an excess risk of diabetes of about 10% regardless of the type of night work. A stated excess risk of being overweight at around 25% was also highlighted for shift workers overall, which could reach 38% among night-shift workers. An increased risk of obesity, estimated at 5% for night-shift workers and at 18% for rotating shift workers, was observed. An excess risk of hypertension was estimated at around 30% when considering the broad definition of shift work and when night periods were included in rotating shifts. The literature provided inconsistent results for the link between lipid disorders and night-shift work. Shift workers appeared to be more likely to smoke. The link between shift work and occupational psychosocial stressors was scarcely explored in the available studies. Sedentariness was scarcely considered in systematic reviews, which prevents any firm conclusions. Conclusion The consequences of night work in terms of diabetes, being overweight/obesity and hypertension are established. Monitoring of these cardiovascular risk factors for these night-shift workers could be implemented by practitioners. In contrast, the links with lipid disorders, sedentariness, smoking habits, and occupational psychosocial stressors warrant further investigation. Systematic review registration https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42021275212, PROSPERO (ID CRD42021275212).
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Affiliation(s)
- Stephanie Boini
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Vandœuvre-les-Nancy, France
| | - Eve Bourgkard
- Department of Occupational Epidemiology, French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), Vandœuvre-les-Nancy, France
| | - Jean Ferrières
- UMR1295, Paul Sabatier III University – INSERM CERPOP: Centre for Epidemiology and Research in POPulation Health, Toulouse, France,Department of Cardiology, CHU Toulouse, Toulouse, France
| | - Yolande Esquirol
- UMR1295, Paul Sabatier III University – INSERM CERPOP: Centre for Epidemiology and Research in POPulation Health, Toulouse, France,Occupational Health Department, CHU Toulouse, Toulouse, France,*Correspondence: Yolande Esquirol
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12
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Saedpanah K, Ghasemi M, Akbari H, Adibzadeh A, Akbari H. Effects of workload and job stress on the shift work disorders among nurses: PLS SEM modeling. Eur J Transl Myol 2022; 33. [PMID: 36412125 DOI: 10.4081/ejtm.2022.10909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 10/31/2022] [Indexed: 11/23/2022] Open
Abstract
Nurses, as the largest forces in the health system, are always challenged with various work responsibilities such as long working hours, lack of manpower and death of patients. This study aimed at providing a model of the relationship between workload and physical and mental health, sleep disorders, and individual and family problems by the mediation role of job stress. The present study is a cross-sectional study that was conducted on 300 nurses in a specialty and sub-specialty hospital in Tehran. For this reason, various questionnaires including demographic, survey of shift workers (SOS) and job stress questionnaires were used to collect the desired data. The proposed model was presented using structural equation modeling method based on Smart-PLS and SPSS-20 software. The results show that workload has an effect on job stress (β=0.747), mental health (β=-0.291), Physical health (β=-0.253), sleep quality (β=-0.234) and personal and family problems (β=-0.206). Also the results of this study show that job stress has an effect on mental health (β=-0.295), Physical health (β=-0.349), sleep quality (β=-0.295) and Personal and family problems (β=-0.441). In conclusion, results showed that the data fitted well with the model and that workload is associated with physical and mental problems, sleep disorders and individual and family problems both directly and indirectly through job stress mediation.
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13
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Different Exposure Metrics of Rotating Night-Shift Work and Serum Lipid Profiles Among Steelworkers. J Occup Environ Med 2022; 64:e475-e481. [DOI: 10.1097/jom.0000000000002588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Silva CM, Teixeira BS, Wright KP, Maia YCDP, Crispim CA. Time-Related Eating Patterns Are Associated with the Total Daily Intake of Calories and Macronutrients in Day and Night Shift Workers. Nutrients 2022; 14:nu14112202. [PMID: 35684002 PMCID: PMC9182503 DOI: 10.3390/nu14112202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 05/11/2022] [Accepted: 05/19/2022] [Indexed: 12/10/2022] Open
Abstract
The aim of the study was to investigate whether time-related eating patterns are associated with the daily intake of calories and macronutrients in Brazilian male military police officers (n = 81; 29-day and 52-night workers; mean age: 36.4 ± 0.9 and 38.5 ± 0.7 years, respectively). Energy and macronutrient intake were determined by a non-consecutive 3-day food recall. Time-related eating patterns, such as the time of the first and the last meals, eating duration, and caloric midpoint, were evaluated. Individuals were classified as “early” or “late” eaters according to the median caloric midpoint. Night shift workers showed a later eating time for the last meal (p < 0.001), longer eating duration (p < 0.001), and later caloric midpoint (p = 0.037) than day workers. Late eaters from both workgroups consumed more 24 h energy (p = 0.028), fat in calories (p = 0.006) and protein (calories: p < 0.001; percentage of total calories: p = 0.042), and less carbohydrates in calories (p = 0.010) intake than early eaters. The time of the first meal was negatively correlated with 24 h energy (p = 0.024) and carbohydrate (p = 0.031) intake only in day workers. The time of the last meal was positively correlated with 24 h energy (day workers: β = 0.352; p = 0.044; night workers: β = 0.424; p = 0.002) and protein (day workers: β = 0.451; p = 0.013; night workers: β = 0.536; p < 0.001) intake for both shift workers, and with carbohydrate (β = 0.346; p = 0.016) and fat (β = 0.286; p = 0.042) intake only in night workers. Eating duration was positively correlated with energy (day workers: β = 0.473; p = 0.004; night workers: β = 0.320; p = 0.023) and carbohydrate (day workers: β = 0.418; p = 0.011; night workers: β = 0.364; p = 0.010) intake in both groups. Thus, time-related eating patterns indicative of intake later at night are associated with increased daily energy and macronutrient intake.
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Affiliation(s)
- Catarina Mendes Silva
- Graduate Program of Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Uberlândia 38400-902, Brazil; (C.M.S.); (B.S.T.); (Y.C.d.P.M.)
| | - Bruno Simão Teixeira
- Graduate Program of Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Uberlândia 38400-902, Brazil; (C.M.S.); (B.S.T.); (Y.C.d.P.M.)
| | - Kenneth P. Wright
- Department of Integrative Physiology, University of Colorado Boulder, 3100 Marine Street, Boulder, CO 80309, USA;
| | - Yara Cristina de Paiva Maia
- Graduate Program of Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Uberlândia 38400-902, Brazil; (C.M.S.); (B.S.T.); (Y.C.d.P.M.)
| | - Cibele Aparecida Crispim
- Graduate Program of Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Uberlândia 38400-902, Brazil; (C.M.S.); (B.S.T.); (Y.C.d.P.M.)
- Correspondence: ; Fax: +55-34-3218-2084
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15
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Yalçin M, Mundorf A, Thiel F, Amatriain-Fernández S, Kalthoff IS, Beucke JC, Budde H, Garthus-Niegel S, Peterburs J, Relógio A. It's About Time: The Circadian Network as Time-Keeper for Cognitive Functioning, Locomotor Activity and Mental Health. Front Physiol 2022; 13:873237. [PMID: 35547585 PMCID: PMC9081535 DOI: 10.3389/fphys.2022.873237] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/08/2022] [Indexed: 12/24/2022] Open
Abstract
A variety of organisms including mammals have evolved a 24h, self-sustained timekeeping machinery known as the circadian clock (biological clock), which enables to anticipate, respond, and adapt to environmental influences such as the daily light and dark cycles. Proper functioning of the clock plays a pivotal role in the temporal regulation of a wide range of cellular, physiological, and behavioural processes. The disruption of circadian rhythms was found to be associated with the onset and progression of several pathologies including sleep and mental disorders, cancer, and neurodegeneration. Thus, the role of the circadian clock in health and disease, and its clinical applications, have gained increasing attention, but the exact mechanisms underlying temporal regulation require further work and the integration of evidence from different research fields. In this review, we address the current knowledge regarding the functioning of molecular circuits as generators of circadian rhythms and the essential role of circadian synchrony in a healthy organism. In particular, we discuss the role of circadian regulation in the context of behaviour and cognitive functioning, delineating how the loss of this tight interplay is linked to pathological development with a focus on mental disorders and neurodegeneration. We further describe emerging new aspects on the link between the circadian clock and physical exercise-induced cognitive functioning, and its current usage as circadian activator with a positive impact in delaying the progression of certain pathologies including neurodegeneration and brain-related disorders. Finally, we discuss recent epidemiological evidence pointing to an important role of the circadian clock in mental health.
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Affiliation(s)
- Müge Yalçin
- Institute for Theoretical Biology (ITB), Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany.,Molecular Cancer Research Center (MKFZ), Medical Department of Hematology, Oncology, and Tumour Immunology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Annakarina Mundorf
- Institute for Systems Medicine and Faculty of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany
| | - Freya Thiel
- Institute for Systems Medicine and Faculty of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany.,Institute and Policlinic of Occupational and Social Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Sandra Amatriain-Fernández
- Institute for Systems Medicine and Faculty of Human Sciences, MSH Medical School Hamburg, Hamburg, Germany
| | - Ida Schulze Kalthoff
- Institute for Systems Medicine and Faculty of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany
| | - Jan-Carl Beucke
- Institute for Systems Medicine and Faculty of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany.,Department of Psychology, Humboldt-Universität zu Berlin, Berlin, Germany.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Henning Budde
- Institute for Systems Medicine and Faculty of Human Sciences, MSH Medical School Hamburg, Hamburg, Germany
| | - Susan Garthus-Niegel
- Institute for Systems Medicine and Faculty of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany.,Institute and Policlinic of Occupational and Social Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Department of Child Health and Development, Norwegian Institute of Public Health, Oslo, Norway
| | - Jutta Peterburs
- Institute for Systems Medicine and Faculty of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany
| | - Angela Relógio
- Institute for Theoretical Biology (ITB), Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany.,Molecular Cancer Research Center (MKFZ), Medical Department of Hematology, Oncology, and Tumour Immunology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany.,Institute for Systems Medicine and Faculty of Human Medicine, MSH Medical School Hamburg, Hamburg, Germany
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16
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Hunger B, Seibt R. Psychosocial Work Stress and Health Risks – A Cross-Sectional Study of Shift Workers From the Hotel and Catering Industry and the Food Industry. Front Public Health 2022; 10:849310. [PMID: 35462838 PMCID: PMC9024122 DOI: 10.3389/fpubh.2022.849310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/23/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose Psychosocial work stress, and shift and night work are considered risk indicators for impaired health. Using the effort-reward (ER) model, it was possible to examine which relationships exist for shift workers between clusters (CL) of different levels of psychosocial work stress and overcommitment (OC) and cardiovascular or psychological health indicators, and which predictive value is evident in individual health indicators to explain the clusters. Methods The data were collected as part of an occupational health prevention program. The analysis sample consisted of 199 shift workers from alternating shift systems with and without night work (43%) (average age: 40 ± 12 years, men: 47%). Psychosocial work stress was recorded using the ER imbalance (ERI) questionnaire. To determine the clusters, ERI and OC were entered into a cluster analysis. Blood pressure, body mass index, waist-hip ratio, PROCAM score (risk of a heart attack within the next 10 years), sporting activity, and smoking were included as cardiovascular indicators, psychological wellbeing (GHQ-12) and inability to recovery (IR) (FABA) as psychological health indicators. Shift system, sex, and age were entered into the statistical analyses as control variables. Multinomial logistic regression models were used to identify health-related predictors to explain the ER-OC clusters. Results Three different ER-OC clusters emerged: low-stress: 36%, normal: 44%, risk: 20%. While normal psychosocial work stress is present in the low-stress and the normal CL, in the risk CL 28% of the shift workers show a health-endangering ERI and 48% show an excessive OC. No significant cluster-specific differences were determined for the cardiovascular health indicators. Rather, the known sex and age effects were confirmed and the shift system had no significant effect. Significantly more shift workers in the risk CL had impaired psychological health (18 vs. 1/6%) and an IR (52 vs. 0/12%) than in the low-stress and normal CL. IR turned out to be the strongest predictor of the explanation for the ER-OC clusters (49%). Conclusion IR could be assigned an independent diagnostic value for the assessment of psychosocial work stresses and discussed as a new component of occupational health screening concepts for shift workers. Independently of this, the health indicators signal an urgent need for occupational health prevention and care.
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Affiliation(s)
- Bettina Hunger
- German Social Accident Insurance Institution for the Foodstuffs and Catering Industry (BGN), Government Safety Organization Foods and Restaurants, Office of Coordination Potsdam, Potsdam, Germany
| | - Reingard Seibt
- Institute for Preventive Medicine of the Rostock University Medical Centre, Rostock, Germany
- *Correspondence: Reingard Seibt
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17
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Mortaş H, Bilici S, Öztürk H, Karakan T. Changes in intestinal parameters and their association with dietary patterns in rotational shift workers. Chronobiol Int 2022; 39:872-885. [PMID: 35232303 DOI: 10.1080/07420528.2022.2044349] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Circadian rhythm disturbances induced by rotating shift work contribute to development of metabolic disorders. However, their effects on intestinal parameters such as epithelial permeability and fecal short chain fatty acid (SCFA) levels have not been established yet. This study was planned to investigate the changes in intestinal integrity, fecal SCFA levels, gut microbiota and nutritional intake of rotational shift workers. The study was conducted on ten male rotational shift workers, 25-40 years old. Circadian rhythm disruption was assumed to have occurred after 14 days in the night shift. Dietary data which was obtained by using 24 h record for 7 days, physical activity data, anthropometric measurements, fecal and blood samples were collected during day and night shift. Changes in dietary consumption, anthropometric measurements, blood chemistry and intestinal epithelial permeability indicator according to day and night shifts were not significant (p > .05). Additionally, acetic, propionic and total SCFA were associated with the intestinal permeability biomarker in night shift, but not in day shift (p < .05). Consumption of dark green vegetables and beans and peas was positively associated with fecal isobutyric acid and fecal total SCFA concentration (r = 0.685, p = .029; r = 0.695, p = .026, respectively). The proportions of the genus including Blautia, Bifidobacterium, Dialister, and Ruminococcus gnavus group increased when individuals shifted to the night shift. Gut microbiota changes responding to circadian rhythm disruption became more prominent when consumed high sugar diet. So, changes have been observed in the gut microbiota of rotational shift workers, especially in individuals with certain dietary pattern. Moreover, in individuals with the circadian rhythm disruption SCFAs levels have been demonstrated to be associated with intestinal barrier integrity. A better understanding of the relation among fecal SCFAs, gut microbiota, intestinal epithelial permeability and circadian rhythm disruption is necessary for the development of new dietary strategies for gut health.
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Affiliation(s)
- Hande Mortaş
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Gazi University, Ankara, Turkey
| | - Saniye Bilici
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Gazi University, Ankara, Turkey
| | - Hakan Öztürk
- Department of Physiology, Faculty of Veterinary Medicine, Ankara University, Ankara, Turkey
| | - Tarkan Karakan
- Department of Internal Medicine Gastroenterology, Faculty of Medicine, Gazi University, Ankara, Turkey
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18
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Sleep Health among Racial/Ethnic groups and Strategies to achieve Sleep Health Equity. Respir Med 2022. [DOI: 10.1007/978-3-030-93739-3_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Dele-Ojo BF, Raimi TH, Fadare JO, Dada SA, Ajayi EA, Ajayi DD, Ogunmodede JA, Ajayi AO. Association between metabolic syndrome and healthcare work status in Ekiti State, Nigeria. Pan Afr Med J 2021; 39:257. [PMID: 34707758 PMCID: PMC8520423 DOI: 10.11604/pamj.2021.39.257.26201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 06/18/2021] [Indexed: 11/11/2022] Open
Abstract
Introduction metabolic syndrome portends an increased risk of cardiovascular events and death. Evidence showed that healthcare workers are at higher risk of cardiovascular events because of their engagement in night-shift work. Therefore, this study determined the association between metabolic syndrome and healthcare work status in Ekiti State, Nigeria. Methods this was a cross-sectional study involving 105 healthcare workers and 143 non-healthcare workers. The diagnosis of metabolic syndrome was made based on the International Diabetic Federation criteria: abdominal obesity plus, any two of: elevated blood pressure ≥ 130/85 mmHg or previous diagnosis of hypertension on the use of antihypertensive medications; impaired fasting glucose; elevated triglycerides; and low HDL-cholesterol. Factors associated with metabolic syndrome were analysed using univariable and multivariable analysis. Results men comprised 37.9% of the study population and the mean age was 42.1 ± 9.7 years. The prevalence of metabolic syndrome was similar in both groups (HCWs-29.5% vs non-HCWs- 28.0%, p-value=0.789); overall prevalence was 28.6%. Abdominal obesity, elevated total cholesterol and elevated LDL-cholesterol occurred more frequently in HCWs than in non-HCWs: (68.6% vs 55.2%, p-value=0.034; 65.7% vs 39.2%, p-value= < 0.001 and 50.5 vs 28.7%; p-value < 0.001) respectively. Female sex (aOR: 3.67, 95% CI: 1.74-7.45; p < 0.001) and obesity (aOR: 4.39, 95% CI: 2.31-8.37; p < 0.001) were associated with metabolic syndrome. Conclusion a similar prevalence of metabolic syndrome was observed in the healthcare workers and the non- healthcare workers. However, abdominal obesity, elevated total cholesterol and elevated LDL-cholesterol occurred more frequently in healthcare workers than in non- healthcare workers.
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Affiliation(s)
- Bolade Folasade Dele-Ojo
- Department of Medicine, Ekiti State University, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, Nigeria
| | - Taiwo Hussean Raimi
- Department of Medicine, Ekiti State University, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, Nigeria
| | - Joseph Olusesan Fadare
- Department of Pharmacology and Therapeutics, Ekiti State University, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, Nigeria
| | - Samuel Ayokunle Dada
- Department of Medicine, Ekiti State University, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, Nigeria
| | - Ebenezer Adekunle Ajayi
- Department of Medicine, Ekiti State University, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, Nigeria
| | - David Daisi Ajayi
- Department of Chemical Pathology, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, Nigeria
| | | | - Akande Oladimeji Ajayi
- Department of Medicine, Ekiti State University, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, Nigeria
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20
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D’Annibale M, Hornzee N, Whelan M, Guess N, Hall W, Gibson R. Eating on the night shift: A need for evidence‐based dietary guidelines? NUTR BULL 2021. [DOI: 10.1111/nbu.12515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Maria D’Annibale
- Department of Nutritional Sciences King’s College London London UK
| | - Nicky Hornzee
- Department of Nutritional Sciences King’s College London London UK
| | - Megan Whelan
- Department of Nutritional Sciences King’s College London London UK
- Work Ready Group British Dietetic Association Birmingham UK
| | - Nicola Guess
- Department of Nutritional Sciences King’s College London London UK
- Research Centre for Optimal Health University of Westminster London UK
| | - Wendy Hall
- Department of Nutritional Sciences King’s College London London UK
| | - Rachel Gibson
- Department of Nutritional Sciences King’s College London London UK
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21
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Circadian Rhythm: Potential Therapeutic Target for Atherosclerosis and Thrombosis. Int J Mol Sci 2021; 22:ijms22020676. [PMID: 33445491 PMCID: PMC7827891 DOI: 10.3390/ijms22020676] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/07/2021] [Accepted: 01/08/2021] [Indexed: 02/07/2023] Open
Abstract
Every organism has an intrinsic biological rhythm that orchestrates biological processes in adjusting to daily environmental changes. Circadian rhythms are maintained by networks of molecular clocks throughout the core and peripheral tissues, including immune cells, blood vessels, and perivascular adipose tissues. Recent findings have suggested strong correlations between the circadian clock and cardiovascular diseases. Desynchronization between the circadian rhythm and body metabolism contributes to the development of cardiovascular diseases including arteriosclerosis and thrombosis. Circadian rhythms are involved in controlling inflammatory processes and metabolisms, which can influence the pathology of arteriosclerosis and thrombosis. Circadian clock genes are critical in maintaining the robust relationship between diurnal variation and the cardiovascular system. The circadian machinery in the vascular system may be a novel therapeutic target for the prevention and treatment of cardiovascular diseases. The research on circadian rhythms in cardiovascular diseases is still progressing. In this review, we briefly summarize recent studies on circadian rhythms and cardiovascular homeostasis, focusing on the circadian control of inflammatory processes and metabolisms. Based on the recent findings, we discuss the potential target molecules for future therapeutic strategies against cardiovascular diseases by targeting the circadian clock.
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22
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Yaw AM, McLane-Svoboda AK, Hoffmann HM. Shiftwork and Light at Night Negatively Impact Molecular and Endocrine Timekeeping in the Female Reproductive Axis in Humans and Rodents. Int J Mol Sci 2020; 22:E324. [PMID: 33396885 PMCID: PMC7795361 DOI: 10.3390/ijms22010324] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/24/2020] [Accepted: 12/25/2020] [Indexed: 01/17/2023] Open
Abstract
Shiftwork, including work that takes place at night (nightshift) and/or rotates between day and nightshifts, plays an important role in our society, but is associated with decreased health, including reproductive dysfunction. One key factor in shiftwork, exposure to light at night, has been identified as a likely contributor to the underlying health risks associated with shiftwork. Light at night disrupts the behavioral and molecular circadian timekeeping system, which is important for coordinated timing of physiological processes, causing mistimed hormone release and impaired physiological functions. This review focuses on the impact of shiftwork on reproductive function and pregnancy in women and laboratory rodents and potential underlying molecular mechanisms. We summarize the negative impact of shiftwork on female fertility and compare these findings to studies in rodent models of light shifts. Light-shift rodent models recapitulate several aspects of reproductive dysfunction found in shift workers, and their comparison with human studies can enable a deeper understanding of physiological and hormonal responses to light shifts and the underlying molecular mechanisms that may lead to reproductive disruption in human shift workers. The contributions of human and rodent studies are essential to identify the origins of impaired fertility in women employed in shiftwork.
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Affiliation(s)
| | | | - Hanne M. Hoffmann
- Department of Animal Science and the Reproductive and Developmental Science Program, Michigan State University, East Lansing, MI 48824, USA
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von Schantz M, Leocadio-Miguel MA, McCarthy MJ, Papiol S, Landgraf D. Genomic perspectives on the circadian clock hypothesis of psychiatric disorders. ADVANCES IN GENETICS 2020; 107:153-191. [PMID: 33641746 DOI: 10.1016/bs.adgen.2020.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Circadian rhythm disturbances are frequently described in psychiatric disorders such as major depressive disorder, bipolar disorder, and schizophrenia. Growing evidence suggests a biological connection between mental health and circadian rhythmicity, including the circadian influence on brain function and mood and the requirement for circadian entrainment by external factors, which is often impaired in mental illness. Mental (as well as physical) health is also adversely affected by circadian misalignment. The marked interindividual differences in this combined susceptibility, in addition to the phenotypic spectrum in traits related both to circadian rhythms and mental health, suggested the possibility of a shared genetic background and that circadian clock genes may also be candidate genes for psychiatric disorders. This hypothesis was further strengthened by observations in animal models where clock genes had been knocked out or mutated. The introduction of genome-wide association studies (GWAS) enabled hypothesis-free testing. GWAS analysis of chronotype confirmed the prominent role of circadian genes in these phenotypes and their extensive polygenicity. However, in GWAS on psychiatric traits, only one clock gene, ARNTL (BMAL1) was identified as one of the few loci differentiating bipolar disorder from schizophrenia, and macaque monkeys where the ARNTL gene has been knocked out display symptoms similar to schizophrenia. Another lesson from genomic analyses is that chronotype has an important genetic correlation with several psychiatric disorders and that this effect is unidirectional. We conclude that the effect of circadian disturbances on psychiatric disorders probably relates to modulation of rhythm parameters and extend beyond the core clock genes themselves.
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Affiliation(s)
- Malcolm von Schantz
- Faculty of Health and Medical Sciences, University of Surrey, Surrey, United Kingdom; Department of Physiology and Behavior, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
| | - Mario A Leocadio-Miguel
- Faculty of Health and Medical Sciences, University of Surrey, Surrey, United Kingdom; Department of Physiology and Behavior, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Michael J McCarthy
- Department of Psychiatry, University of California San Diego, San Diego, CA, United States
| | - Sergi Papiol
- Department of Psychiatry, University Hospital, Munich, Germany; Institute of Psychiatric Phenomics and Genomics (IPPG), Munich, Germany
| | - Dominic Landgraf
- Circadian Biology Group, Department of Molecular Neurobiology, Clinic of Psychiatry and Psychotherapy, University Hospital, Munich, Germany
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Xu W, Jain MK, Zhang L. Molecular link between circadian clocks and cardiac function: a network of core clock, slave clock, and effectors. Curr Opin Pharmacol 2020; 57:28-40. [PMID: 33189913 DOI: 10.1016/j.coph.2020.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/27/2020] [Accepted: 10/06/2020] [Indexed: 02/08/2023]
Abstract
The circadian rhythm has a strong influence on both cardiac physiology and disease in humans. Preclinical studies primarily using tissue-specific transgenic mouse models have contributed to our understanding of the molecular mechanism of the circadian clock in the cardiovascular system. The core clock driven by CLOCK:BMAL1 complex functions as a universal timing machinery that primarily sets the pace in all mammalian cell types. In one specific cell or tissue type, core clock may control a secondary transcriptional oscillator, conceptualized as slave clock, which confers the oscillatory expression of tissue-specific effectors. Here, we discuss a core clock-slave clock-effectors network, which links the molecular clock to cardiac function.
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Affiliation(s)
- Weiyi Xu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Mukesh K Jain
- Case Cardiovascular Research Institute, Department of Medicine, Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, USA; School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Lilei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
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Function and Morphology of the Meibomian Glands Using a LipiView Interferometer in Rotating Shift Medical Staff. J Ophthalmol 2020; 2020:3275143. [PMID: 32879738 PMCID: PMC7448232 DOI: 10.1155/2020/3275143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 07/04/2020] [Accepted: 07/25/2020] [Indexed: 11/19/2022] Open
Abstract
Purpose To investigate the function and morphology of meibomian glands (MG) in night shift medical staff (MS). Methods Sixty-two eyes of 31 patients in the MS group and 59 eyes of 31 patients in the control group were consecutively enrolled. All participants completed Ocular Surface Disease Index (OSDI) and Standard Patient Dry Eye Evaluation (SPEED) questionnaires for dry eye severity, as well as Schirmer I and tear break-up time (TBUT) tests. LipiView® II Ocular Surface Interferometer was used for lipid layer thickness (LLT), MG dropout, and partial blink (PB) rate tests. MG expression was measured with an MG evaluator. Results The OSDI score in the MS group was 22.39 ± 13.42, which was significantly higher than that in the control group (9.87 ± 6.64 Z = −3.997, P=0.001). The SPEED score in the MS group was 7.94 ± 3.81, which was significantly higher than in the control group (3.65 ± 2.11, Z = −4.766, P=0.001). There was no significant difference in Schirmer I test between the MS group and control group (Z = −1.346, P=0.178). TBUT in MS group was significantly shorter than that in the control group (Z = −5.201, P=0.001). The mean LLT of the MS group was 55.02 ± 21.17 nm significantly thinner than that of the control group 72.76 ± 21.62 nm (Z = −4.482, P=0.001). MG loss occurred in 45.16% of affected eyes in the MS group and 16.13% of affected eyes in the control group, and the difference was statistically significant (χ2 = 14.352, P=0.001). MG yielding liquid secretion and MG yielding secretion score were significantly lower in the MS group than in the control group (Z = −3.641, P=0.001; Z = −3.146, P=0.001, resp.). There was a negative correlation between mean LLT and SPEED score (Spearman r = −0.363, P=0.045). Conclusions Night shift MS had a higher incidence of MGD compared to day workers.
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Monfredi O, Lakatta EG. Complexities in cardiovascular rhythmicity: perspectives on circadian normality, ageing and disease. Cardiovasc Res 2020; 115:1576-1595. [PMID: 31150049 DOI: 10.1093/cvr/cvz112] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/06/2019] [Accepted: 05/25/2019] [Indexed: 12/13/2022] Open
Abstract
Biological rhythms exist in organisms at all levels of complexity, in most organs and at myriad time scales. Our own biological rhythms are driven by energy emitted by the sun, interacting via our retinas with brain stem centres, which then send out complex messages designed to synchronize the behaviour of peripheral non-light sensing organs, to ensure optimal physiological responsiveness and performance of the organism based on the time of day. Peripheral organs themselves have autonomous rhythmic behaviours that can act independently from central nervous system control but is entrainable. Dysregulation of biological rhythms either through environment or disease has far-reaching consequences on health that we are only now beginning to appreciate. In this review, we focus on cardiovascular rhythms in health, with ageing and under disease conditions.
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Affiliation(s)
- Oliver Monfredi
- Division of Medicine, Department of Cardiology, The Johns Hopkins Hospital, 1800 Orleans Street, Baltimore, MD, USA.,Laboratory of Cardiovascular Sciences, Intramural Research Program, National Institute on Aging, National Institutes of Health, 251 Bayview Blvd, Baltimore, MD, USA
| | - Edward G Lakatta
- Laboratory of Cardiovascular Sciences, Intramural Research Program, National Institute on Aging, National Institutes of Health, 251 Bayview Blvd, Baltimore, MD, USA
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27
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Aarts MPJ, Hartmeyer SL, Morsink K, Kort HSM, de Kort YAW. Can Special Light Glasses Reduce Sleepiness and Improve Sleep of Nightshift Workers? A Placebo-Controlled Explorative Field Study. Clocks Sleep 2020; 2:225-245. [PMID: 33089202 PMCID: PMC7445845 DOI: 10.3390/clockssleep2020018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 05/21/2020] [Indexed: 12/22/2022] Open
Abstract
Nightshift workers go against the natural sleep-wake rhythm. Light can shift the circadian clock but can also induce acute alertness. This placebo-controlled exploratory field study examined the effectiveness of light glasses to improve alertness while reducing the sleep complaints of hospital nurses working nightshifts. In a crossover within-subjects design, 23 nurses participated, using treatment glasses and placebo glasses. Sleepiness and sleep parameters were measured. A linear mixed model analysis on sleepiness revealed no significant main effect of the light intervention. An interaction effect was found indicating that under the placebo condition, sleepiness was significantly higher on the first nightshift than on the last night, while under the treatment condition, sleepiness remained stable across nightshift sessions. Sleepiness during the commute home also showed a significant interaction effect, demonstrating that after the first nightshift, driver sleepiness was higher for placebo than for treatment. Subjective sleep quality showed a negative main effect of treatment vs. placebo, particularly after the first nightshift. In retrospect, both types of light glasses were self-rated as effective. The use of light glasses during the nightshift may help to reduce driver sleepiness during the commute home, which is relevant, as all participants drove home by car or (motor) bike.
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Affiliation(s)
- Mariëlle P J Aarts
- Department of the Built Environment, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; (K.M.); (H.S.M.K.)
| | - Steffen L Hartmeyer
- Department of Industrial Engineering and Innovation Sciences, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; (S.L.H.); (Y.A.W.d.K.)
| | - Kars Morsink
- Department of the Built Environment, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; (K.M.); (H.S.M.K.)
| | - Helianthe S M Kort
- Department of the Built Environment, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; (K.M.); (H.S.M.K.)
- Technology for Healthcare Innovations, Utrecht University of Applied Science, P.O. Box 12011, 3501 AA Utrecht, The Netherlands
| | - Yvonne A W de Kort
- Department of Industrial Engineering and Innovation Sciences, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands; (S.L.H.); (Y.A.W.d.K.)
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Lee M, Park MS, Cheong HK. An association between oil spill clean-up work and cardiovascular disease. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 194:110284. [PMID: 32145526 DOI: 10.1016/j.ecoenv.2020.110284] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 01/29/2020] [Accepted: 01/31/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND In December 2007, Taean, South Korea, experienced the largest oil spill in Korean history. After about 10 years of follow-up, we evaluated the long-term effect of the disaster on the cardiovascular health of residents and clean-up workers/volunteers. OBJECTIVE We examined the relationship between the duration of oil clean-up work and the risk of incident angina and myocardial infarction (MI). METHODS We used data from a prospective cohort study, the Health Effects Research of Oil Spill (HEROS); we included adult cohort members free from cardiovascular disease who completed at least the first two surveys (n = 1737). At baseline, members reported the number of days they participated in oil clean-up work; during the subsequent surveys, they reported newly diagnosed cases of angina or MI. We fitted a time-varying interval-censored proportional hazard model, controlling for age, sex, body mass index, smoking status, monthly household income, and distance from the affected seashore to residence. RESULTS The risk of incident angina or MI was greater in those with more than 15 days' exposure; those with 15-59 days showed a hazard ratio (HR) of 1.34 (95% confidence interval [CI]: 0.87, 2.06) those with 60-179 days had an HR of 1.31 (0.95, 1.79), and those worked longest (180 or more days) showed the strongest association with a HR of 1.75 (95% CI: 1.17, 2.61). CONCLUSION We found that a greater duration of clean-up work was associated with an increased risk of incident angina or MI.
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Affiliation(s)
- Mihye Lee
- St. Luke's International University School of Public Health, Tokyo, Japan.
| | | | - Hae-Kwan Cheong
- Department of Social and Preventive Medicine, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
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Consequences of Circadian Disruption in Shift Workers on Chrononutrition and their Psychosocial Well-Being. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17062043. [PMID: 32204445 PMCID: PMC7142532 DOI: 10.3390/ijerph17062043] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/06/2020] [Accepted: 03/08/2020] [Indexed: 12/27/2022]
Abstract
The workers and employees in various institutions are subjected to different shifts and work schedules. The employees work not only at daytime but also during odd hours at night. The biological clock of an individual is often altered during night shifts. This affects the psychosocial well-being and circadian nutritional intake of the worker. Disturbance in circadian rhythm results in the development of metabolic disorders such as hypertension, dyslipidemia, dysglycemia, and abdominal obesity. In the present review, we discuss the nature of shift work, sleep/wake cycle of an individual, chrononutrition, dietary habits, and meal changes with regard to timing and frequency, related to shift work. We also discuss the relationship between nutritional intake and psychosocial well-being among shift workers. The review may be beneficial for prevention of metabolic disorders and maintaining sound psychological condition in shift workers.
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Johnson CY, Tanz LJ, Lawson CC, Schernhammer ES, Vetter C, Rich‐Edwards JW. Night shift work and cardiovascular disease biomarkers in female nurses. Am J Ind Med 2020; 63:240-248. [PMID: 31828843 DOI: 10.1002/ajim.23079] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/28/2019] [Accepted: 11/21/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Night shift work is associated with cardiovascular disease, but its associations with cardiovascular disease biomarkers are unclear. We investigated these associations in a study of female nurses. METHODS We used data from the Nurses' Health Study II for total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein (HDL) cholesterol, triglycerides, C-reactive protein (CRP), and fibrinogen. The sample sizes for our analysis ranged from 458 (fibrinogen) to 3574 (total cholesterol). From questionnaires, we determined the number of night shifts worked in the 2 weeks before blood collection and total years of rotating night shift work. We used quantile regression to estimate differences in biomarker levels by shift work history, adjusting for potential confounders. RESULTS Nurses working 1 to 4 recent night shifts had median HDL cholesterol levels 4.4 mg/dL (95% confidence interval [CI]: 0.3, 7.5) lower than nurses without recent night shifts. However, working ≥5 recent night shifts and years of rotating night shift work were not associated with HDL cholesterol. There was no association between recent night shifts and CRP, but median CRP levels were 0.1 (95% CI: 0.0, 0.2), 0.2 (95% CI: 0.1, 0.4), and 0.2 (95% CI: 0.0, 0.4) mg/L higher among nurses working rotating night shifts for 1 to 5, 6 to 9, and ≥10 years compared with nurses never working rotating night shifts. These associations were attenuated when excluding postmenopausal women and women taking statins. We observed no associations between night shift work and other biomarkers. CONCLUSIONS We found suggestive evidence of adverse short-term and long-term effects of night shift work on select cardiovascular disease biomarkers.
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Affiliation(s)
- Candice Y. Johnson
- National Institute for Occupational Safety and HealthCenters for Disease Control and Prevention Cincinnati Ohio
| | - Lauren J. Tanz
- Department of EpidemiologyHarvard T.H. Chan School of Public Health Boston Massachusetts
- Division of Women's HealthBrigham and Women's Hospital Boston Massachusetts
| | - Christina C. Lawson
- National Institute for Occupational Safety and HealthCenters for Disease Control and Prevention Cincinnati Ohio
| | - Eva S. Schernhammer
- Department of EpidemiologyHarvard T.H. Chan School of Public Health Boston Massachusetts
- Channing Division of Network Medicine, Department of MedicineBrigham and Women's Hospital and Harvard Medical School Boston Massachusetts
- Department of EpidemiologyCenter for Public Health, Medical University of Vienna Vienna Austria
| | - Céline Vetter
- Department of Integrative PhysiologyUniversity of Colorado BoulderBoulder Colorado
| | - Janet W. Rich‐Edwards
- Department of EpidemiologyHarvard T.H. Chan School of Public Health Boston Massachusetts
- Division of Women's HealthBrigham and Women's Hospital Boston Massachusetts
- Channing Division of Network Medicine, Department of MedicineBrigham and Women's Hospital and Harvard Medical School Boston Massachusetts
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Abstract
The Earth turns on its axis every 24 h; almost all life on the planet has a mechanism - circadian rhythmicity - to anticipate the daily changes caused by this rotation. The molecular clocks that control circadian rhythms are being revealed as important regulators of physiology and disease. In humans, circadian rhythms have been studied extensively in the cardiovascular system. Many cardiovascular functions, such as endothelial function, thrombus formation, blood pressure and heart rate, are now known to be regulated by the circadian clock. Additionally, the onset of acute myocardial infarction, stroke, arrhythmias and other adverse cardiovascular events show circadian rhythmicity. In this Review, we summarize the role of the circadian clock in all major cardiovascular cell types and organs. Second, we discuss the role of circadian rhythms in cardiovascular physiology and disease. Finally, we postulate how circadian rhythms can serve as a therapeutic target by exploiting or altering molecular time to improve existing therapies and develop novel ones.
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32
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Karelius S, Vahtera J, Pentti J, Lindroos AS, Jousilahti P, Heinonen OJ, Stenholm S, Niiranen TJ. The relation of work-related factors with ambulatory blood pressure and nocturnal blood pressure dipping among aging workers. Int Arch Occup Environ Health 2020; 93:563-570. [PMID: 31893291 PMCID: PMC7260250 DOI: 10.1007/s00420-019-01510-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 12/18/2019] [Indexed: 11/10/2022]
Abstract
Objectives Individuals with reduced nocturnal blood pressure (BP) dipping are at increased risk of cardiovascular disease compared to persons with normal BP dipping. Although the relation of work-related factors and BP has been studied extensively, very little is known of the association between work-related factors and 24-h BP patterns in aging workers. We examined the cross-sectional relation of work-related risk factors, including occupational status, work-time mode, job demands and job control, with ambulatory BP in aging workers, focusing on nocturnal BP dipping. Methods 208 workers (mean age 62 ± 3 years; 75% women) from two Finnish population-based cohort studies underwent 24-h ambulatory BP monitoring. Work-related factors were inquired using a questionnaire. Nocturnal BP dipping was calculated as [1 − (asleep BP/awake BP)] × 100. Results Shift workers demonstrated a higher nocturnal diastolic BP dipping than regular day workers (19% vs. 17%, p = 0.03) and had a significantly higher systolic awake BP than regular day workers (136.5 mmHg vs. 132.5 mmHg, p = 0.03). Participants with high job demands demonstrated a smaller nocturnal systolic BP dipping than participants with low job demands (14% vs. 16%, p = 0.04). We did not observe significant differences in nocturnal systolic or diastolic BP dipping between groups categorized by occupational status or job control. Conclusions Although shift workers have a higher daytime BP than regular daytime workers, they exhibit greater nighttime BP dipping. Participants with high job demand had smaller nighttime BP dipping than participants with low job demand. Job control or occupation did not affect the 24-h ambulatory BP profile of aging workers.
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Affiliation(s)
- Saana Karelius
- Department of Internal Medicine, University of Turku, Turku, Finland.
| | - Jussi Vahtera
- Department of Public Health, University of Turku, Turku, Finland.,Centre for Population Health Research, University of Turku and Turku University Hospital, Turku, Finland
| | - Jaana Pentti
- Department of Public Health, University of Turku, Turku, Finland.,Centre for Population Health Research, University of Turku and Turku University Hospital, Turku, Finland.,Clinicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Annika S Lindroos
- Department of Internal Medicine, University of Turku, Turku, Finland
| | - Pekka Jousilahti
- Department of Public Health Solutions, National Institute for Health and Welfare, Helsinki, Finland
| | - Olli J Heinonen
- Paavo Nurmi Centre & Department of Health and Physical Activity, University of Turku, Turku, Finland
| | - Sari Stenholm
- Department of Public Health, University of Turku, Turku, Finland.,Centre for Population Health Research, University of Turku and Turku University Hospital, Turku, Finland
| | - Teemu J Niiranen
- Department of Internal Medicine, University of Turku, Turku, Finland.,Department of Public Health Solutions, National Institute for Health and Welfare, Helsinki, Finland.,Division of Medicine, Turku University Hospital, Turku, Finland
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Travill AL, Soeker F, Overmeyer D, Rickers F. Cardiovascular and metabolic risk factors of shift workers within the automotive industry. Health SA 2019; 24:1227. [PMID: 31934435 PMCID: PMC6917447 DOI: 10.4102/hsag.v24i0.1227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 06/20/2019] [Indexed: 12/04/2022] Open
Abstract
Background Previous research highlighted the importance of identifying the modifiable risk factors among shift workers in specific industries to take effective preventative and therapeutic steps to decrease the risks associated with non-communicable chronic diseases. Aim The aim of this study was to investigate the prevalence of cardiovascular and metabolic disease risk factors among shift workers within the automotive industry. Setting This study was conducted at a car manufacturing company in the Eastern Cape Province of South Africa. Methods The study employed a cross-sectional quantitative design. Body mass index was calculated, and the American College for Sports Medicine classification for normal weight, overweight and obesity was used to assess the weight status of the workers. Fasting blood glucose and cholesterol as well as blood pressure (BP) were also measured. Results Seventy-five automotive shift workers participated in the research. Twenty-three per cent of the participants had no risk factors, 30.6% had one risk factor, 34.7% had two risk factors and only 5.3% exhibited four risk factors. Sixty-six percent of participants were classified as either pre-obese or obese, while 55% were hypertensive. Systolic BP (r = 0.258; p < 0.05), diastolic BP (r = 0.342; p < 0.01), cholesterol (r = 0.258; p < 0.05) and age (r = 0.271; p < 0.05) significantly correlated with body mass index. Conclusion This study highlights the prevalence of risk factors for cardiovascular diseases among employees in the automotive industry. However, it does not show any risk factors for metabolic diseases.
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Affiliation(s)
- Andre L Travill
- Department Sport, Recreation and Exercise Science, Faculty of Community and Health Sciences, University of the Western Cape, Bellville, South Africa
| | - Farzaanah Soeker
- Department Sport, Recreation and Exercise Science, Faculty of Community and Health Sciences, University of the Western Cape, Bellville, South Africa
| | - Dillon Overmeyer
- Department Sport, Recreation and Exercise Science, Faculty of Community and Health Sciences, University of the Western Cape, Bellville, South Africa
| | - Frederic Rickers
- Department Sport, Recreation and Exercise Science, Faculty of Community and Health Sciences, University of the Western Cape, Bellville, South Africa
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Riegel B, Daus M, Lozano AJ, Malone SK, Patterson F, Hanlon AL. Shift Workers Have Higher Blood Pressure Medicine Use, But Only When They Are Short Sleepers: A Longitudinal UK Biobank Study. J Am Heart Assoc 2019; 8:e013269. [PMID: 31581870 PMCID: PMC6818048 DOI: 10.1161/jaha.119.013269] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Some, but not all, studies report associations between shift work and hypertension, suggesting that particular subgroups may be at risk. We examined moderating effects of sleep duration and circadian preference on the relationship between shift work and new blood pressure (BP) medicine use at follow‐up. Methods and Results Baseline and 5‐year follow‐up data from the UK Biobank cohort (N=9200) were used to generate logistic regression models for shift workers and nonshift workers. The moderating effects of sleep duration (short ≤6 hours; adequate 7–8 hours; long ≥9 hours) and circadian preference (morning “larks;” intermediate; evening “owls”) at baseline were examined with new BP medicine use at follow‐up, adjusting for age, sex, race, education, employment, urban/rural, cardiovascular disease family history, depression, alcohol intake, physical activity, diet, smoking, and body mass index. The sample was predominately middle aged (55.3±7.4), female (57.3%), and white (97.9%). Most reported adequate sleep duration (7–8 hours, 73.7%) and were intermediate type (65.3%); 8.0% were shift workers at baseline. Only 6.5% reported new BP medicine use at follow‐up. Short sleep duration was a significant moderator of new BP medicine use in shift workers. Among short sleepers, shift workers had a 2.1‐fold increased odds of new BP medicine use compared with nonshift workers (odds ratio=2.08, 95% CI=1.21–3.58, P=0.008). In those reporting adequate (odds ratio=0.82, 95% CI=0.54–1.25, P=0.35) and long sleep (odds ratio=0.64, 95% CI=0.11–3.54, P=0.60), this relationship was protective but nonsignificant. Interaction between circadian preference and shift work on BP medicine use was nonsignificant. Conclusions Shift workers with short sleep duration may be at risk for hypertension.
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Affiliation(s)
- Barbara Riegel
- School of Nursing Biobehavioral Health Sciences Department University of Pennsylvania Philadelphia PA
| | - Marguerite Daus
- School of Nursing Biobehavioral Health Sciences Department University of Pennsylvania Philadelphia PA
| | - Alicia J Lozano
- Department of Statistics College of Science Hutcheson Hall Virginia Tech Blacksburg VA
| | - Susan K Malone
- Rory Meyers College of Nursing New York University New York NY
| | - Freda Patterson
- Department of Behavioral Health and Nutrition College of Health Sciences University of Delaware Newark DE
| | - Alexandra L Hanlon
- Department of Statistics College of Science Hutcheson Hall Virginia Tech Blacksburg VA
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Cayanan EA, Eyre NAB, Lao V, Comas M, Hoyos CM, Marshall NS, Phillips CL, Shiao JSC, Guo YLL, Gordon CJ. Is 24-hour energy intake greater during night shift compared to non-night shift patterns? A systematic review. Chronobiol Int 2019; 36:1599-1612. [DOI: 10.1080/07420528.2019.1666865] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Elizabeth A. Cayanan
- Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
- CIRUS, Centre for Sleep and Chronobiology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, Australia
- NeuroSleep, National Health and Medical Research Council Centre of Research Excellence, Sydney, Australia
| | - Nadine A. B. Eyre
- Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Vickie. Lao
- Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Maria Comas
- CIRUS, Centre for Sleep and Chronobiology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, Australia
- Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Camilla M. Hoyos
- CIRUS, Centre for Sleep and Chronobiology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, Australia
- School of Psychology, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
- Healthy Brain Ageing Program, Brain and Mind Centre, Charles Perkins Centre, University of Sydney, Sydney, Australia
| | - Nathaniel S. Marshall
- Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
- CIRUS, Centre for Sleep and Chronobiology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, Australia
- NeuroSleep, National Health and Medical Research Council Centre of Research Excellence, Sydney, Australia
| | - Craig L. Phillips
- CIRUS, Centre for Sleep and Chronobiology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, Australia
- Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
- Sydney Health Partners (Sleep and Respiratory Department, Royal North Shore Hospital), Sydney, Australia
| | - Judy S. C. Shiao
- Department of Nursing, College of Medicine National Taiwan University & National Taiwan Hospital, Taipei, Taiwan
| | - Yue-Liang Leon Guo
- Department of Environmental and Occupational Medicine, National Taiwan University & National Taiwan Hospital, Taipei, Taiwan
| | - Christopher J. Gordon
- Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
- CIRUS, Centre for Sleep and Chronobiology, Woolcock Institute of Medical Research, The University of Sydney, Sydney, Australia
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Reid KJ, Weng J, Ramos AR, Zee PC, Daviglus M, Mossavar-Rahmani Y, Sotres-Alvarez D, Gallo LC, Chirinos DA, Patel SR. Impact of shift work schedules on actigraphy-based measures of sleep in Hispanic workers: results from the Hispanic Community Health Study/Study of Latinos ancillary Sueño study. Sleep 2019; 41:5053098. [PMID: 30010969 DOI: 10.1093/sleep/zsy131] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Indexed: 12/15/2022] Open
Abstract
Study Objectives To describe sleep characteristics of shift workers compared with day workers from the Hispanic Community Health Study/Study of Latinos (HCHS/SOL) Sueño ancillary study and test the hypothesis that shift work is associated with shorter sleep duration, worse sleep quality, greater sleep variability, and other sleep/health-related factors. Methods Employed adults (N = 1253, mean age 46.3 years, 36.3% male) from the Sueño study were included. Measures of sleep duration, timing, regularity, and continuity were calculated from 7 days of wrist-activity monitoring. Participants provided information on demographics, employment, work schedule (day, afternoon, night, split, irregular, and rotating), sleepiness, depressive symptoms, medications, caffeine, and alcohol use. Survey linear regression adjusting for age, sex, background, site, number of jobs, and work hours was used. Results In age and sex-adjusted models, all shift work schedules were associated with delayed sleep timing. Night and irregular schedules were associated with shorter sleep duration, greater napping, and greater variability of sleep. Afternoon and rotating shifts were associated with lower sleep regularity. In fully adjusted models, night and irregular schedules remained associated with shorter sleep duration, later sleep midpoint, and greater variability in sleep measures compared with day schedules. Split schedules were associated with, less time in bed, less sleep fragmentation, and less wake during the sleep period than day schedules. Conclusions Work schedule significantly affects sleep-wake with substantial differences between day work and other types of schedule. Detailed assessment of work schedule type not just night shift should be considered as an important covariate when examining the association between sleep and health outcomes.
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Affiliation(s)
- Kathryn J Reid
- Department of Neurology, Northwestern University, Chicago, IL
| | - Jia Weng
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA
| | - Alberto R Ramos
- Department of Neurology, University of Miami, Miller School of Medicine, Miami, FL
| | - Phyllis C Zee
- Department of Neurology, Northwestern University, Chicago, IL
| | | | - Yasmin Mossavar-Rahmani
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY
| | - Daniela Sotres-Alvarez
- Department of Biostatistics, Collaborative Studies Coordinating Center, University of North Carolina, Chapel Hill, NC
| | - Linda C Gallo
- Department of Psychology, San Diego State University, San Diego, CA
| | | | - Sanjay R Patel
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA
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Silva-Costa A, Rotenberg L, Baltar VT, Coeli CM, Fonseca MDJMD, Melo ECP, Griep RH. Structural equation modeling of associations between night work and glycemic levels. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2019; 63:487-494. [PMID: 31271576 PMCID: PMC10522263 DOI: 10.20945/2359-3997000000147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 04/08/2019] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Different pathways may lead from night work to metabolic diseases, including type 2 diabetes. This study aimed to explore the direct and indirect pathways from night work to glycemic levels, considering the role of physical activity, waist circumference and snacking using data from ELSA-Brasil. MATERIALS AND METHODS A structural equation model was used to confirm the pathways from night work to glycemic levels. The latent variable, "glycemic levels", included fasting glucose, glycated hemoglobin and 2-hour plasma glucose. RESULTS A total of 10.396 participants were included in the analyses. The final model showed that among women, night work was associated with increased glycemic levels. A statistical significant association between night work and glycemic levels mediated by waist circumference was observed among women and men. CONCLUSIONS The association between night shift and glycemic levels can be interpreted as an important step toward understanding the pathways that could explain night work as a risk factor for diabetes using epidemiological data.
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Affiliation(s)
- Aline Silva-Costa
- Departamento de Saúde Coletiva , Universidade Federal do Triângulo Mineiro (UFTM), Uberaba , MG , Brasil
- Departamento de Epidemiologia e Métodos Quantitativos em Saúde , Escola Nacional de Saúde Pública (ENSP- Fiocruz ), Rio de Janeiro , RJ , Brasil
| | - Lúcia Rotenberg
- Laboratório de Educação em Ambiente e Saúde , Fiocruz , Rio de Janeiro , RJ , Brasil
| | - Valéria Troncoso Baltar
- Departamento de Epidemiologia e Bioestatística , Instituto de Saúde Coletiva , Universidade Federal Fluminense (UFF), Niterói , RJ , Brasil
| | - Claudia Medina Coeli
- Instituto de Estudos em Saúde Coletiva , Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro , RJ , Brasil
| | - Maria de Jesus Mendes da Fonseca
- Departamento de Epidemiologia e Métodos Quantitativos em Saúde , Escola Nacional de Saúde Pública (ENSP- Fiocruz ), Rio de Janeiro , RJ , Brasil
| | - Enirtes Caetano Prates Melo
- Departamento de Epidemiologia e Métodos Quantitativos em Saúde , Escola Nacional de Saúde Pública (ENSP- Fiocruz ), Rio de Janeiro , RJ , Brasil
| | - Rosane Härter Griep
- Laboratório de Educação em Ambiente e Saúde , Fiocruz , Rio de Janeiro , RJ , Brasil
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Holst MM, Wirth MD, Mnatsakanova A, Burch JB, Charles LE, Tinney-Zara C, Fekedulegn D, Andrew ME, Hartley TA, Violanti JM. Shiftwork and Biomarkers of Subclinical Cardiovascular Disease: The BCOPS Study. J Occup Environ Med 2019; 61:391-396. [PMID: 30649009 PMCID: PMC6610651 DOI: 10.1097/jom.0000000000001541] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To assess the association of shiftwork with biomarkers of subclinical cardiovascular disease and examine the moderating role of body mass index (BMI) in a police cohort. METHODS A cross-sectional analysis was conducted among officers who were categorized as working the day, evening, or night shift. Comparisons with inflammatory biomarkers were performed among shifts using analysis of variance/covariance and further stratified by BMI to assess potential effect modification. RESULTS Associations were observed between day and night shiftworkers for leukocytes, tumor necrosis factor alpha, and homocysteine. After BMI stratification, higher c-reactive protein (CRP) levels were observed among evening shiftworkers with a BMI more than or equal to 30 kg/m versus the day shift. CONCLUSIONS Future studies examining prospective changes in these markers will allow for more comprehensive evaluation of their association with shiftwork.
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Affiliation(s)
- Meghan M. Holst
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - Michael D. Wirth
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
- Cancer Prevention and Control Program, University of South Carolina, Columbia, SC USA
- College of Nursing, University of South Carolina, Columbia, SC, USA
| | - Anna Mnatsakanova
- Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - James B. Burch
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
- Cancer Prevention and Control Program, University of South Carolina, Columbia, SC USA
- WJB Dorn VA Medical Center, Columbia, SC, USA
| | - Luenda E. Charles
- Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Cathy Tinney-Zara
- Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Desta Fekedulegn
- Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Michael E. Andrew
- Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - Tara A. Hartley
- Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA
| | - John M. Violanti
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University of Buffalo, The State University of New York, Buffalo, NY, USA
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Loef B, van Baarle D, van der Beek AJ, Beekhof PK, van Kerkhof LW, Proper KI. The association between exposure to different aspects of shift work and metabolic risk factors in health care workers, and the role of chronotype. PLoS One 2019; 14:e0211557. [PMID: 30707727 PMCID: PMC6358078 DOI: 10.1371/journal.pone.0211557] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 01/16/2019] [Indexed: 01/06/2023] Open
Abstract
Objective Shift work has been linked to cardio-metabolic diseases, but insight into different shift work-related aspects and chronotype of shift workers and their relation with metabolic risk factors is limited. This study examined the association between current shift work status, frequency and duration of night shift work, chronotype, and metabolic risk factors in a population of health care workers. Methods Anthropometrics, questionnaires, and blood samples were collected from 503 shift working and 93 non-shift working health care workers employed in hospitals. Body mass index, waist circumference, cholesterol (total, HDL, LDL), triglycerides, and high-sensitivity C-reactive protein were measured. Associations of current shift work, frequency (non-night shift worker, 1–2, 3–4, ≥5 night shifts/month) and duration of night shift work (non-night shift workers, <10, 10–19, ≥20 years), and shift workers’ chronotype, with metabolic risk factors were studied using linear regression analysis. Results Compared to non-shift workers, shift workers’ total cholesterol level was 0.38 mmol/L lower (95%-CI = -0.73 –-0.04) and LDL cholesterol was 0.34 mmol/L lower (95%-CI = -0.60 –-0.08). For all other metabolic risk factors, no differences were found. The association between shift work and LDL cholesterol was especially found among shift workers working night shifts for ≥20 years (B = -0.49 (95%-CI = -0.78 –-0.19)). No differences were found for night shift frequency and chronotype. Conclusion In this population of health care workers employed in hospitals, no evidence for differences in metabolic risk factors was observed that could underlie a link between shift work and cardio-metabolic diseases. Further research using different aspects of shift work to study the association with metabolic risk factors is recommended.
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Affiliation(s)
- Bette Loef
- Center for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- Department of Public and Occupational Health, Amsterdam Public Health research institute, VU University Medical Center, Amsterdam, The Netherlands
| | - Debbie van Baarle
- Center for Infectious Diseases Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- Department of Immunology, Laboratory for Translational Immunology, University Medical Center, Utrecht, The Netherlands
| | - Allard J. van der Beek
- Department of Public and Occupational Health, Amsterdam Public Health research institute, VU University Medical Center, Amsterdam, The Netherlands
| | - Piet K. Beekhof
- Center for Health Protection, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Linda W. van Kerkhof
- Center for Health Protection, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Karin I. Proper
- Center for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- * E-mail:
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Pimenta FAP, Alves RL, Oliveira FLPD, Nascimento Neto RMD, Coelho GLLM, Freitas SND. Qualidade de vida e excesso de peso em trabalhadores em turnos alternantes. REVISTA BRASILEIRA DE SAÚDE OCUPACIONAL 2019. [DOI: 10.1590/2317-6369000002417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo Objetivo: identificar a percepção dos trabalhadores de turnos alternantes de uma mineradora da região dos Inconfidentes, Minas Gerais, sobre sua qualidade de vida (QV) e analisar sua associação com indicadores de excesso de adiposidade corporal. Métodos: estudo transversal com 437 trabalhadores em turnos alternantes com um ou mais fatores de risco cardiovascular. Dados sociodemográficos e clínicos foram analisados. A QV foi avaliada com o questionário SF-36 e a adiposidade corporal estimada a partir das medidas antropométricas e de composição corporal. Resultados: a pontuação para os domínios da QV variou de 67 a 100, no entanto, o aumento de gordura corporal apresentou correlação negativa com os domínios saúde geral, vitalidade e capacidade funcional. Foi observada, por análise de cluster, a formação de dois agrupamentos, um composto pelos domínios da QV e o outro constituído pelos indicadores de composição corporal. Não foi identificada associação entre os escores estimados de QV dos trabalhadores de turno e o tempo de trabalho. Conclusão: o declínio da QV apresentou associação com o excesso de adiposidade corporal. Recomenda-se a adoção de medidas visando reduzir o excesso de adiposidade corporal e melhorar a qualidade de vida dos trabalhadores em turno alternante da mineração.
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Huo Yung Kai S, Ruidavets JB, Carles C, Marquie JC, Bongard V, Leger D, Ferrieres J, Esquirol Y. Impact of occupational environmental stressors on blood pressure changes and on incident cases of hypertension: a 5-year follow-up from the VISAT study. Environ Health 2018; 17:79. [PMID: 30445973 PMCID: PMC6240201 DOI: 10.1186/s12940-018-0423-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Accepted: 10/30/2018] [Indexed: 05/28/2023]
Abstract
BACKGROUND The role of occupational stressors (OS) on blood pressure (BP) is often suspected, but asserting its impact remains uncertain. Our goal was to evaluate their impact on BP increase and on incident cases of hypertension over a 5-year period. METHODS One thousand, one hundred and fifty-six men and women from the French prospective VISAT study were followed up over five-years (T1 to T2). Exposures to a large panel of OS (physical, organizational, psychosocial and employment categories) were collected. Linear and logistic regressions were used to assess associations between OS and T2-T1 SBP difference and incident cases of hypertension. They were performed to determine the role of OS first considered separately, then in combination, in crude and adjusted models for main cardiovascular risk factors (gender, age, education, BMI, lifestyle habits and medical history). RESULTS For initial SBP level < 130 mmHg, carrying loads, intense noise exposure, working more than 48 h/week, active and high strain tended to be associated with an SBP difference increase, while job recognition was associated with a decrease. After adjustment, only significant associations with job strain and job recognition persisted. For initial SBP level ≥ 130 mmHg, being exposed to an active job strain was positively associated with T2-T1 SBP difference only in unadjusted model. Considering all the OS, the recognition of completed tasks had a major protective role. No impact of OS on incident cases of hypertension was observed. CONCLUSION Associations between OS and SBP were observed mainly when initial SBP is within the normal range, and are mainly explained by cardiovascular factors, requiring physician's particular attention to people exposed to these OS. VISAT study is registered in "LE PORTAIL EPIDEMIOLOGIE - FRANCE- AVIESAN -ID 3666".
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Affiliation(s)
| | | | - Camille Carles
- Univ. Bordeaux, INSERM UMR 1219, Equipe EPICENE, F33000 Bordeaux, France
- CHU de Bordeaux, Service de Médecine du Travail et pathologie professionnelle, F33000 Bordeaux, France
| | | | - Vanina Bongard
- UMR1027, INSERM, Université Paul Sabatier Toulouse III, 31000 Toulouse, France
- Department of Epidemiology, CHU de Toulouse (Centre Hospitalier Universitaire), 31062 Toulouse, France
| | - Damien Leger
- Sorbonne Paris Cité, APHP, Hôtel Dieu, Centre du Sommeil et de la Vigilance et EA 7330 VIFASOM, Université Paris Descartes, 75004 Paris, France
| | - Jean Ferrieres
- UMR1027, INSERM, Université Paul Sabatier Toulouse III, 31000 Toulouse, France
- Department of Cardiology, CHU de Toulouse (Centre Hospitalier Universitaire), 31062 Toulouse, France
| | - Yolande Esquirol
- UMR1027, INSERM, Université Paul Sabatier Toulouse III, 31000 Toulouse, France
- Occupational Health department, CHU-Toulouse, 31000 Toulouse, France
- Faculté de médecine, 37 allées jules Guesde, 31000 Toulouse, France
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Reinhardt ÉL, Fernandes PACM, Markus RP, Fischer FM. Night work effects on salivary cytokines TNF, IL-1β and IL-6. Chronobiol Int 2018; 36:11-26. [PMID: 30230913 DOI: 10.1080/07420528.2018.1515771] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Shift work is unavoidable in modern societies, but at the same time disrupts biological rhythms and contributes to social distress and disturbance of sleep, health and well-being of shift workers. Shift work has been associated with some chronic diseases in which a chronic inflammatory condition may play a role. However, few studies investigating the association of cytokine and other inflammation markers with shift workers have been published in recent years. In this study we evaluated the effects of permanent night work on the production of tumor necrosis factor (TNF), interleukin-1β (IL-1β), IL-6 and melatonin in saliva. Another aim was to demonstrate the benefit of the use of salivary cytokines for studies in chronobiology, since it is an easy and non-invasive method that allows for sampling at several times. Thirty-eight healthy male workers, being 21 day workers and 17 night workers, agreed to participate in this study. Sleep was evaluated by actigraphy and activity protocols. Saliva was collected during three workdays approximately at the middle of the work shift and at bed and wake times of the main sleep episode. Saliva samples were then analyzed by enzyme-linked immunosorbent assay to measure TNF, IL-1β, IL-6 and melatonin levels, and the results were submitted to non-parametric statistical analysis. The use of saliva instead of blood allowed for a greater number of samples from the same subjects, allowing identifying alterations in the daily production patterns of salivary cytokines TNF, IL-1β and IL-6 that probably are linked to night work. Salivary TNF and IL-1β levels were similar for day and night workers, with higher daily production after awakening, in the morning hours for day workers and in the afternoon for night workers. Both groups presented a significant daily variation pattern of these two cytokines. Day and night workers produced similar amounts of salivary IL-6. Nevertheless, the daily variation pattern observed among day workers, with a peak after awakening, was absent among night workers. Thus, in our study, night workers showed partially adjusted daily variation patterns for salivary TNF and IL-1β, not seen for salivary IL-6. Results for salivary IL-6 could be better explained as a consequence of circadian disruption due to permanent night work. Our results suggest that the whole circadian system, including clocks and pineal gland, is involved in regulating cytokine profile in shift workers and that a coordinated production of these cytokines, important for an adequate inflammatory response, could be disturbed by shift work. The distinct effects that shift work may have on different cytokines could give some cues about the mechanisms involved in this association.
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Affiliation(s)
| | | | - Regina P Markus
- b Laboratory of Chronopharmacology, Department of Physiology , Institute of Bioscience, University of São Paulo , São Paulo , Brazil
| | - Frida Marina Fischer
- c Department of Environmental Health , School of Public Health, University of São Paulo , São Paulo , Brazil
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Gibson R. Working hours and cardiometabolic health - an emerging area of nutritional research. NUTR BULL 2018. [DOI: 10.1111/nbu.12337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. Gibson
- Department of Nutritional Sciences; King's College London; London UK
- Department of Epidemiology and Biostatistics; Imperial College London; London UK
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Lassen AD, Fagt S, Lennernäs M, Nyberg M, Haapalar I, Thorsen AV, Møbjerg ACM, Beck AM. The impact of worksite interventions promoting healthier food and/or physical activity habits among employees working 'around the clock' hours: a systematic review. Food Nutr Res 2018; 62:1115. [PMID: 30083088 PMCID: PMC6073101 DOI: 10.29219/fnr.v62.1115] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 05/16/2018] [Accepted: 07/01/2018] [Indexed: 12/19/2022] Open
Abstract
We conducted a systematic review of randomised studies on the impact of worksite interventions to promote healthier food and/or physical activity among people who work irregular hours ‘around the clock’, that is, outside of ordinary daytime working hours. The population–intervention–comparator–outcomes–study (PICOS) design format was used. Data sources were PubMed and CINAHL. An updated search was conducted on October 2017 using Google Scholar and the related articles function in PubMed on initially included studies to identify additional studies. Risk of bias was used to assess study quality. A total of seven studies (reports published in 14 papers) were included in the systematic review: Two interventions with a broader lifestyle approach, three focusing on physical exercise and two on providing healthier food or meal options. The studies had sample sizes from 30 to 1,000 and targeted a mixture of occupations, including both male- and female-dominated occupational groups. The interventions lasted from 2 to 12 months. Only one had an extended follow-up. In general, the studies showed small-to-moderate effect sizes on several measures, including dietary and/or physical activity measures, suggesting acceptable effectiveness for interventions involving community-level behaviour change. Our findings highlight a need to further develop and implement well-designed health promotion interventions with comparable outcome measures and effect size reports. A mixture of health promotion strategies is recommended for future practice in this target population, including individually tailored programmes, improving the food and physical activity environment and using broader lifestyle approaches including the use of participatory and empowerment strategies. While more research is needed in this field, the existing knowledge base on effective approaches awaits translation into practice.
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Affiliation(s)
- Anne Dahl Lassen
- Division for Risk Assessment and Nutrition, Technical University of Denmark, Kemitorvet, Lyngby, Denmark
| | - Sisse Fagt
- Division for Risk Assessment and Nutrition, Technical University of Denmark, Kemitorvet, Lyngby, Denmark
| | - Maria Lennernäs
- Department of Occupational and Public Health Science, University of Gävle, Gävle, Sweden
| | - Maria Nyberg
- Department of Food and Meal Science, Kristianstad University, Kristianstad, Sweden
| | - Irja Haapalar
- School of Social and Political Sciences, The University of Melbourne, Melbourne, Victoria, Australia.,School of Applied Educational Sciences and Teacher Education, Savonlinna, Finland
| | - Anne V Thorsen
- Division for Risk Assessment and Nutrition, Technical University of Denmark, Kemitorvet, Lyngby, Denmark
| | - Anna C M Møbjerg
- Institute for Nursing and Nutrition, University College Copenhagen, Copenhagen N, Denmark
| | - Anne M Beck
- Institute for Nursing and Nutrition, University College Copenhagen, Copenhagen N, Denmark.,Clinical Nutrition Research Unit, Copenhagen University Hospital Herlev-Gentofte, Gentofte, Denmark
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Zimmerman AR, Johnson L, Brunstrom JM. Assessing “chaotic eating” using self-report and the UK Adult National Diet and Nutrition Survey: No association between BMI and variability in meal or snack timings. Physiol Behav 2018; 192:64-71. [DOI: 10.1016/j.physbeh.2018.03.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/10/2018] [Accepted: 03/21/2018] [Indexed: 11/26/2022]
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Abu Farha R, Alefishat E. Shift Work and the Risk of Cardiovascular Diseases and Metabolic Syndrome Among Jordanian Employees. Oman Med J 2018; 33:235-242. [PMID: 29896332 DOI: 10.5001/omj.2018.43] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Objectives We sought to evaluate the effect of night shift working on increasing the risk of developing cardiovascular disease (CVD) using three different predictors. Methods One hundred and forty adult Jordanian employees were recruited in this cross-sectional study. Demographic data, anthropometric parameters, and working patterns information were documented. Metabolic syndrome (MetS) was diagnosed, and atherogenic index of the plasma (AIP) and Framingham risk score were calculated. Results Night shift workers had a significantly higher AIP ratio compared to daytime workers (p = 0.024). No significant association was observed between the two groups in term of 30-year Framingham risk score (p = 0.115). However, the duration of night shifts and the number of night shifts per months were found to significantly increase the 30-year Framingham risk (p = 0.000 and 0.012, respectively). Furthermore, the incidence of MetS among night shift workers was 15.9% (13/82) compared to 10.3% (6/58) among daytime workers (p = 0.484). Conclusions This is the first study to assess the association between night shift work and AIP as well as the 30-year Framingham risk score as predictors of CVDs. Night shift work was associated with an increase in AIP score compared to daytime work. Also, the duration of night shifts and the number of night shifts per month significantly increased the 30-year Framingham risk among night shift workers. These findings suggest an association between night shift work and the risk of CVD and atherosclerosis. Our results highlight the need for interventional strategies to diminish the risk of CVD in night shift workers.
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Affiliation(s)
- Rana Abu Farha
- Department of Clinical Pharmacy and Therapeutics, Faculty of Pharmacy, Applied Science Private University, Amman, Jordan
| | - Eman Alefishat
- Department of Biopharmaceutics and Clinical Pharmacy, Faculty of Pharmacy, The University of Jordan, Amman, Jordan
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Sun M, Feng W, Wang F, Zhang L, Wu Z, Li Z, Zhang B, He Y, Xie S, Li M, Fok JPC, Tse G, Wong MCS, Tang JL, Wong SYS, Vlaanderen J, Evans G, Vermeulen R, Tse LA. Night shift work exposure profile and obesity: Baseline results from a Chinese night shift worker cohort. PLoS One 2018; 13:e0196989. [PMID: 29763461 PMCID: PMC5953447 DOI: 10.1371/journal.pone.0196989] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 04/24/2018] [Indexed: 12/14/2022] Open
Abstract
AIMS This study aimed to evaluate the associations between types of night shift work and different indices of obesity using the baseline information from a prospective cohort study of night shift workers in China. METHODS A total of 3,871 workers from five companies were recruited from the baseline survey. A structured self-administered questionnaire was employed to collect the participants' demographic information, lifetime working history, and lifestyle habits. Participants were grouped into rotating, permanent and irregular night shift work groups. Anthropometric parameters were assessed by healthcare professionals. Multiple logistic regression models were used to evaluate the associations between night shift work and different indices of obesity. RESULTS Night shift workers had increased risk of overweight and obesity, and odds ratios (ORs) were 1.17 (95% CI, 0.97-1.41) and 1.27 (95% CI, 0.74-2.18), respectively. Abdominal obesity had a significant but marginal association with night shift work (OR = 1.20, 95% CI, 1.01-1.43). A positive gradient between the number of years of night shift work and overweight or abdominal obesity was observed. Permanent night shift work showed the highest odds of being overweight (OR = 3.94, 95% CI, 1.40-11.03) and having increased abdominal obesity (OR = 3.34, 95% CI, 1.19-9.37). Irregular night shift work was also significantly associated with overweight (OR = 1.56, 95% CI, 1.13-2.14), but its association with abdominal obesity was borderline (OR = 1.26, 95% CI, 0.94-1.69). By contrast, the association between rotating night shift work and these parameters was not significant. CONCLUSION Permanent and irregular night shift work were more likely to be associated with overweight or abdominal obesity than rotating night shift work. These associations need to be verified in prospective cohort studies.
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Affiliation(s)
- Miaomiao Sun
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Wenting Feng
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, China
| | - Feng Wang
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
- Shenzhen Municipal Key Laboratory for Health Risk Analysis, Shenzhen Research Institute of the Chinese University of Hong Kong, Shenzhen, China
- * E-mail: (LAT); (FW)
| | - Liuzhuo Zhang
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, China
| | - Zijun Wu
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, China
| | - Zhimin Li
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen, China
| | - Bo Zhang
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
- School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Yonghua He
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Shaohua Xie
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Mengjie Li
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Joan P. C. Fok
- Occupational Medicine Care Service, New Territories East Cluster, Hospital Authority, Hong Kong SAR, China
| | - Gary Tse
- Department of Medicine and Therapeutics, Faculty of Medicine, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Martin C. S. Wong
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Jin-ling Tang
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
- Shenzhen Municipal Key Laboratory for Health Risk Analysis, Shenzhen Research Institute of the Chinese University of Hong Kong, Shenzhen, China
| | - Samuel Y. S. Wong
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Jelle Vlaanderen
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, Netherland
| | - Greg Evans
- Occupational and Environmental Health Division, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Roel Vermeulen
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, Netherland
| | - Lap Ah Tse
- JC School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
- Shenzhen Municipal Key Laboratory for Health Risk Analysis, Shenzhen Research Institute of the Chinese University of Hong Kong, Shenzhen, China
- * E-mail: (LAT); (FW)
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The Relationship Between Shift Work and Men's Health. Sex Med Rev 2018; 6:446-456. [PMID: 29371140 DOI: 10.1016/j.sxmr.2017.11.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 11/18/2017] [Accepted: 11/26/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND More than 21 million Americans and nearly 20% of the U.S. workforce are shift workers. Non-standard shift work, defined as work that falls outside of 6 am-6 pm, can lead to poor diet, exercise, and sleep habits that lead to decreased productivity, increased workplace accidents, and a variety of negative health outcomes. AIM To investigate the associations between shift work exposure and chronic medical conditions such as metabolic syndromes, cardiovascular disease, gastrointestinal disturbances, and depression as well as urologic complications including hypogonadism, male infertility, lower urinary tract symptoms, and prostate cancer with a focus on the effects of shift work sleep disorder (SWSD) on the severity of these negative health outcomes. METHODS We reviewed the literature examining effects of shift work and SWSD on general and urologic health. OUTCOMES We produced a summary of effects of shift work on health with focus on the increased risk of negative health outcomes in non-standard shift workers, particularly those with SWSD, when compared to daytime workers or workers without SWSD. RESULTS Studies have associated non-standard shift work schedules and poor health outcomes, including increased risks of diabetes mellitus, dyslipidemia, hypertension, heart disease, peptic ulcer disease, and depression, in shift workers. However, few studies have focused on the role that shift work plays in men's urologic health. Current evidence supports associations between non-standard shift work and increased hypogonadal symptoms, poor semen parameters, decreased fertility, lower urinary tract symptoms, and prostate cancer. These associations are strengthened by the presence of SWSD, which affects up to 20% of shift workers. Unfortunately, interventions, such as planned naps, timed light exposure, melatonin, and sedative hypnotics, aimed at alleviating excessive nighttime sleepiness and daytime insomnia in non-standard shift workers experiencing SWSD, are limited and lack strong evidence to support their efficacy. CONCLUSIONS Non-standard shift work has been associated with a variety of negative health outcomes and urologic complications, especially with concurrent SWSD. Recognition of these increased risks among shift workers can potentially aid in more effective screening of chronic health and urologic conditions. Non-pharmacologic treatment of SWSD focuses on behavioral therapy and sleep hygiene while melatonin, hypnotics, and stimulants are used to alleviate insomnia and excessive sleepiness of SWSD. Further research into both pharmacologic and non-pharmacologic therapies for SWSD is needed to establish more definitive guidelines in the treatment of SWSD in order to increase productivity, minimize workplace accidents, and improve quality of life for shift workers. Deng N, Kohn TP, Lipshultz LI, et al. The Relationship Between Shift Work and Men's Health. Sex Med Rev 2018;6:446-456.
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50
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Shift-work: is time of eating determining metabolic health? Evidence from animal models. Proc Nutr Soc 2018; 77:199-215. [DOI: 10.1017/s0029665117004128] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The circadian disruption in shift-workers is suggested to be a risk factor to develop overweight and metabolic dysfunction. The conflicting time signals given by shifted activity, shifted food intake and exposure to light at night occurring in the shift-worker are proposed to be the cause for the loss of internal synchrony and the consequent adverse effects on body weight and metabolism. Because food elicited signals have proven to be potent entraining signals for peripheral oscillations, here we review the findings from experimental models of shift-work and verify whether they provide evidence about the causal association between shifted feeding schedules, circadian disruption and altered metabolism. We found mainly four experimental models that mimic the conditions of shift-work: protocols of forced sleep deprivation, of forced activity during the normal rest phase, exposure to light at night and shifted food timing. A big variability in the intensity and duration of the protocols was observed, which led to a diversity of effects. A common result was the disruption of temporal patterns of activity; however, not all studies explored the temporal patterns of food intake. According to studies that evaluate time of food intake as an experimental model of shift-work and studies that evaluate shifted food consumption, time of food intake may be a determining factor for the loss of balance at the circadian and metabolic level.
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