scholarly journals Energy, Nutrient and Food Intakes of Male Shift Workers Vary According to the Schedule Type but Not the Number of Nights Worked

Nutrients ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 919
Author(s):  
Sophie Bucher Della Torre ◽  
Pascal Wild ◽  
Victor Dorribo ◽  
Brigitta Danuser ◽  
Francesca Amati
Keyword(s):  
Eating Habits ◽  
Night Shift ◽  
Food Group ◽  
Pooled Analysis ◽  
Dietary Intakes ◽  
Food Groups ◽  
Shift Workers ◽  
Increased Risk ◽  
Schedule Type ◽  
Night Shifts

Shift work is associated with increased risk of chronic diseases due to circadian rhythm disruptions and behavioral changes such as in eating habits. Impact of type of shifts and number of night shifts on energy, nutrient and food intake is as yet unknown. Our goal was to analyze shift workers’ dietary intake, eating behavior and eating structure, with respect to frequency of nights worked in a given week and seven schedule types. Eating habits and dietary intakes of 65 male shift workers were analyzed in three steps based on 365 24-h food records: (1) according to the number of nights, (2) in a pooled analysis according to schedule type, and (3) in search of an interaction of the schedule and the timing of intake. Mean nutrient and food group intake during the study period did not depend on the number of nights worked. Amount and distribution of energy intake as well as quality of food, in terms of nutrient and food groups, differed depending on the type of schedule, split night shifts and recovery day (day after night shift) being the most impacted. Shift workers’ qualitative and quantitative dietary intakes varied between different schedules, indicating the need for tailored preventive interventions.

Inadequate Dietary Intakes: Among Pregnant Women

2012 ◽  
Vol 73 (2) ◽  
pp. 72-77 ◽  
Author(s):  
Jennifer K. Fowler ◽  
Susan E. Evers ◽  
M. Karen Campbell
Keyword(s):  
Pregnant Women ◽  
Food Group ◽  
Reproductive Age ◽  
Dietary Intakes ◽  
Food Groups ◽  
Eating Behaviours ◽  
Prenatal Health ◽  
Canadian City ◽  
Minimum Number ◽  
Health Project

Purpose: Eating behaviours were assessed among pregnant women in a mid-sized Canadian city. Methods: As part of the Prenatal Health Project, we interviewed 2313 pregnant women in London, Ontario. Subjects also completed a food frequency questionnaire. Recruitment took place in ultrasound clinics at 10 to 22 weeks of gestation. The main outcome measures were number of daily servings for each food group, measured against the minimum number recommended by the 2007 Eating Well with Canada’s Food Guide (CFG), the proportion of women consuming the recommended number of servings for each and all of the four food groups, and factors associated with adequate consumption. We also determined the number of servings of “other foods.” Analysis included descriptive statistics and logistic regression, all at p<0.05. Results: A total of 3.5% of women consumed the recommended number of servings for all four food groups; 15.3% did not consume the minimum number of servings of foods for any of the four food groups. Women for whom this was their first pregnancy were less likely to consume the recommended number of servings from all four food groups (odds ratio=0.41; confidence interval=0.23, 0.74). Conclusions: Very few pregnant women consumed food group servings consistent with the 2007 recommendations. Strategies to improve dietary behaviours must focus on the establishment of healthy eating behaviours among women of reproductive age.

scholarly journals Chronotype-specific Sleep in Two Versus Four Consecutive Shifts

2021 ◽  
pp. 074873042110060
Author(s):  
Dorothee Fischer ◽  
Till Roenneberg ◽  
Céline Vetter
Keyword(s):  
Night Shift ◽  
Sleep Diary ◽  
Sequence Length ◽  
Consecutive Night ◽  
Shift Workers ◽  
Subject Field ◽  
Sleep Diaries ◽  
Social Jetlag ◽  
Sleep Debt ◽  
Night Shifts

The study aimed to explore chronotype-specific effects of two versus four consecutive morning or night shifts on sleep-wake behavior. Sleep debt and social jetlag (a behavioral proxy of circadian misalignment) were estimated from sleep diary data collected for 5 weeks in a within-subject field study of 30 rotating night shift workers (29.9 ± 7.3 years, 60% female). Mixed models were used to examine whether effects of shift sequence length on sleep are dependent on chronotype, testing the interaction between sequence length (two vs. four) and chronotype (determined from sleep diaries). Analyses of two versus four morning shifts showed no significant interaction effects with chronotype. In contrast, increasing the number of night shifts from two to four increased sleep debt in early chronotypes, but decreased sleep debt in late types, with no change in intermediate ones. In early types, the higher sleep debt was due to accumulated sleep loss over four night shifts. In late types, sleep duration did not increase over the course of four night shifts, so that adaptation is unlikely to explain the observed lower sleep debt. Late types instead had increased sleep debt after two night shifts, which was carried over from two preceding morning shifts in this schedule. Including naps did not change the findings. Social jetlag was unaffected by the number of consecutive night shifts. Our results suggest that consecutive night shifts should be limited in early types. For other chronotypes, working four night shifts might be a beneficial alternative to working two morning and two night shifts. Studies should record shift sequences in rotating schedules.

scholarly journals Diet and cancer in Northeast Brazil: evaluation of eating habits and food group consumption in relation to breast cancer

2008 ◽  
Vol 24 (4) ◽  
pp. 820-828 ◽  
Author(s):  
Flávia Emília Leite de Lima ◽  
Maria do Rosário Dias de Oliveira Latorre ◽  
Maria José de Carvalho Costa ◽  
Regina Mara Fisberg
Keyword(s):  
Breast Cancer ◽  
Dairy Products ◽  
Case Control Study ◽  
Eating Habits ◽  
Strong Association ◽  
Food Group ◽  
Northeast Brazil ◽  
Food Groups ◽  
Diet And Cancer ◽  
Control Study

A hospital-based case-control study was performed from August 2002 to November 2003 in Northeast Brazil. Eighty-nine women were recruited with histologically confirmed breast cancer (age 30-80 years), matched for age with 94 controls. Food consumption of cases and controls was evaluated by foods and food groups, categorized in consumption tertiles. Odds ratio (OR) and 95% confidence intervals (95%CI) were obtained through unconditional logistic regression. Intake of fruits and juices, beans, and dairy products showed a strong association with reduced risk of breast cancer. Consumption of red and fried meat was positively associated with risk of breast cancer (red meat - OR = 4.30; 95%CI: 1.74-10.67; p for trend = 0.00). No association was observed in vegetable and sausage meat groups and breast cancer. Red and fried meat may be risk factors, and intake of fruit, beans, and dairy products may protect against breast cancer.

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

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

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

scholarly journals Underreporting of energy intake among Japanese women aged 18–20 years and its association with reported nutrient and food group intakes

2004 ◽  
Vol 7 (7) ◽  
pp. 911-917 ◽  
Author(s):  
Hitomi Okubo ◽  
Satoshi Sasaki
Keyword(s):  
Metabolic Rate ◽  
Energy Intake ◽  
Basal Metabolic Rate ◽  
Food Group ◽  
Young Female ◽  
Dietary Intakes ◽  
Food Groups ◽  
Female Population ◽  
Reporting Accuracy ◽  
Diet History Questionnaire

AbstractObjectives:To evaluate the ratio of energy intake to basal metabolic rate (EI/BMR) among young female Japanese adults, and to compare the lifestyle and dietary characteristics between relatively low and high reporters.Design:Dietary intakes were assessed over a 1-month period with a validated, self-administered, diet history questionnaire, and lifestyle variables were assessed by a second questionnaire designed for this survey. The ratio of EI/BMR was calculated from reported energy intake and estimated basal metabolic rate.Subjects:In total, 1889 female Japanese university students aged 18–20 years who were enrolled in dietetics courses.Results:Ninety-five per cent of the subjects were classified into a non-obese group (body mass index (BMI) <25 kg m−2; mean±standard deviation (SD): 20.8±2.6 kg m−2). EI/BMR was 1.43±0.40 (mean±SD). Sixty-eight per cent of the subjects showed an EI/BMR level below the possibly balanced value of 1.56, 37% showed EI/BMR below the minimum survival value of 1.27 and 2% of the subjects showed EI/BMR exceeding the maximum value for a sustainable lifestyle of 2.4. BMI, body weight and BMR decreased significantly with the increase in EI/BMR (P<0.001). The percentage of energy from carbohydrate was significantly higher, whereas those from fat and protein were significantly lower, among the lower EI/BMR groups. As for food groups, a significantly declining trend from the lowest to the highest EI/BMR groups was observed for cereals.Conclusion:Underreporting, rather than overreporting, of energy intake was predominant in this relatively lean Japanese female population. BMI was the most important factor affecting the reporting accuracy of energy intake.

scholarly journals Does modifying the timing of meal intake improve cardiovascular risk factors? Protocol of an Australian pilot intervention in night shift workers with abdominal obesity

BMJ Open ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. e020396 ◽  
Author(s):  
Maxine P Bonham ◽  
Gloria K W Leung ◽  
Rochelle Davis ◽  
Tracey L Sletten ◽  
Chiara Murgia ◽  
...  
Keyword(s):  
Risk Factors ◽  
Night Shift ◽  
Control Period ◽  
Potential Effect ◽  
The Body ◽  
Cvd Risk ◽  
Post Intervention ◽  
Main Trial ◽  
Shift Workers ◽  
Increased Risk

IntroductionShift work is an independent risk factor for cardiovascular disease (CVD). Shift workers who are awake overnight and sleep during the day are misaligned with their body’s endogenous circadian rhythm. Eating at night contributes to this increased risk of CVD by forcing the body to actively break down and process nutrients at night. This pilot study aims to determine whether altering meal timing overnight, in a shift working population, will impact favourably on modifiable risk factors for CVD (postprandial bplasma lipids and glucose concentration).Methods and analysisA randomised cross-over study with two 4-week test periods, separated by a minimum of a 2-week washout will be undertaken. The effectiveness of redistributing energy intake overnight versusad libitumeating patterns on CVD risk factors will be examined in night shift workers (n=20), using a standard acute test meal challenge protocol. Primary outcomes (postprandial lipids and glucose) will be compared between the two conditions: post-intervention and post-control period using analysis of variance. Potential effect size estimates to inform sample size calculations for a main trial will also be generated.Ethics and disseminationEthics approval has been granted by the Monash University Human Research Ethics Committee (2017-8619-10329). Outcomes from this study will determine whether eliminating food intake for a defined period at night (1–6 am) impacts favourably on metabolic risk factors for CVD in night shift workers. Collective results from this novel trial will be disseminated through peer-reviewed journals, and national and international presentations. The results are essential to inform health promotion policies and guidelines for shift workers, especially those who aim to improve their metabolic health.Trial registration numberACTRN12617000791336; Pre-results.

scholarly journals Circadian misalignment increases mood vulnerability in simulated shift work

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

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

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

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

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

scholarly journals Relationship between Night shift work, Eating Habits and BMI among Nurses in Lebanon

2020 ◽  
Author(s):  
Zeinab Samhat ◽  
Randa Attieh ◽  
Yonna Sacre
Keyword(s):  
Shift Work ◽  
Dietary Habits ◽  
Eating Habits ◽  
Night Shift ◽  
Cumulative Number ◽  
Anthropometric Measures ◽  
Cross Sectional ◽  
Night Shift Work ◽  
Validated Questionnaire ◽  
Night Shifts

Abstract Background: The objective of this cross-sectional study was to evaluate the relationships between night shift work, eating habits and body mass index (BMI) among Lebanese nurses. Methods: A total of 307 nurses were randomly selected from five hospitals located in Beirut. Data about demographic and professional characteristics, anthropometric measures, dietary habits and intakes were collected through a validated questionnaire. To study the relationship between night shift work, eating habits and BMI, chi-square test, t-test and logistic regressions were used.Results: The majority of nurses (78. 2%) had irregular meals timing with a significant decrease in the number of complete meals consumed during the day and an increase in the number of snacks consumed during night (p<0. 05). The most consumed snacks during night shifts were sweets and potato chips. The findings highlighted that BMI and waist circumference significantly increased with the number of years of work (r=0.175; p<0.05) and the cumulative number of night shifts hours over the entire work history (r=0.135/p< 0. 05). Conclusion: Night shift work is positively associated with abnormal eating patterns and BMI among Lebanese nurses. However the increase in BMI is not related to eating habits.

scholarly journals Night shift work is associated with an increased risk of asthma

Thorax ◽  
2020 ◽  
Vol 76 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Robert J Maidstone ◽  
James Turner ◽  
Celine Vetter ◽  
Hassan S Dashti ◽  
Richa Saxena ◽  
...  
Keyword(s):  
Public Health ◽  
Severe Asthma ◽  
Shift Work ◽  
Inflammatory Diseases ◽  
Large Population ◽  
Night Shift ◽  
Smoking History ◽  
Shift Workers ◽  
Increased Risk ◽  
The Impact

IntroductionShift work causes misalignment between internal circadian time and the external light/dark cycle and is associated with metabolic disorders and cancer. Approximately 20% of the working population in industrialised countries work permanent or rotating night shifts, exposing this large population to the risk of circadian misalignment-driven disease. Analysis of the impact of shift work on chronic inflammatory diseases is lacking. We investigated the association between shift work and asthma.MethodsWe describe the cross-sectional relationship between shift work and prevalent asthma in >280000 UK Biobank participants, making adjustments for major confounding factors (smoking history, ethnicity, socioeconomic status, physical activity, body mass index). We also investigated chronotype.ResultsCompared with day workers, ‘permanent’ night shift workers had a higher likelihood of moderate-severe asthma (OR 1.36 (95% CI 1.03 to 1.8)) and all asthma (OR 1.23 (95% CI 1.03 to 1.46)). Individuals doing any type of shift work had higher adjusted odds of wheeze/whistling in the chest. Shift workers who never or rarely worked on nights and people working permanent nights had a higher adjusted likelihood of having reduced lung function (FEV1 <80% predicted). We found an increase in the risk of moderate-severe asthma in morning chronotypes working irregular shifts, including nights (OR 1.55 (95% CI 1.06 to 2.27)).ConclusionsThe public health implications of these findings are far-reaching due to the high prevalence and co-occurrence of both asthma and shift work. Future longitudinal follow-up studies are needed to determine if modifying shift work schedules to take into account chronotype might present a public health measure to reduce the risk of developing inflammatory diseases such as asthma.

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