Night shift work, short sleep and obesity

Abstract

Background: Obesity is associated with increased general mortality and comorbidities, it is multifactorial and some evidence has shown that sleep duration and shift work may be implicated in its pathogenesis. Objectives:The aim of this study was to evaluate the association between shift work, quality of life and obesity among healthcare workers of a Brazilian University Hospital. Methods:A cross-sectional study was performed from April 2013 to December 2014 with 200 workers of a University Hospital. Sociodemographic data were evaluated and BREF WHOQOL was used for quality of life. The physical activity was evaluated using the International Physical Activity Questionnaire (IPAQ), Chronotypes and daily sleep preference were investigated using Munich Chronotype Questionnaire (MCTQ). Venous blood was collected after 12-h of fasting for laboratory tests. Results:In this sample, the night shift workers had higher income and were older compared to day shift workers. Night shift workers sleep less hours, had higher weight, body mass index and abdominal circumference when compared to the day shift workers. Night shift workers had almost 3 times higher association with abdominal obesity independent of age and gender, than day shift workers. MCTQ parameters showed that night shift workers had lower sleep duration during working days and also during free days, associated with a higher level of social jetlag. Social jetlag had an association with obesity. We found no difference for quality of life between shifts. Conclusions:Night work was a risk factor for abdominal obesity, social jetlag was higher in night shift workers and it was associated with presence of obesity.

Night Shift Work, Chronotype, Sleep Duration, and Prostate Cancer Risk: CAPLIFE Study

“…So, although in the German cohort study the midpoint of the night on free days was used to calculate the chronotype, they used the 25th and 75th percentiles to establish the cut-off point between morning–intermediate and intermediate–night chronotypes, respectively [ 25 ]. In contrast, we used the MCTQ, a questionnaire widely used to determine the chronotype [ 32 , 57 , 58 ] including in the Spanish population [ 13 , 49 , 50 , 51 ], with cut-off points established a priori.…”

“…Shift work may modify sleep habits and chronotype [ 31 , 32 ]. Along these lines, an association between sleep duration and cancer has been described, finding a relationship between a deficit of hours of sleep and a higher risk of breast and colorectal cancer [ 33 , 34 ].…”

Estresse Ocupacional, qualidade do sono e obesidade em Policiais Militares - Revisão narrativa

“…The shift worker normally presents a high prevalence in EDS and high probability of occurrence of short "naps" during working hours. These behaviors have been directly associated with high indexes of accidents at work, which in the case of military personnel, can cost their lives and other´s, as mentioned before (Pinto et al, 2018;Smith et al, 2018;Brum et al, 2020). In fact, scientific evidence is growing and suggest that shift work, especially the night one, is detrimental to workers' Research, Society andDevelopment, v. 10, n. 3, e36510313485, 2021 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v10i3.13485 health and safety (military personnel included) with a direct relationship with obesity and increased risk of suffering from type 2 diabetes, depression, and cancer (Ghanbary et al, 2017).…”

“…It is known that a sedentary lifestyle, high amounts of daily energy intake and persistent short sleep duration are considered to induce obesity (Brum et al, 2020). Furthermore, these factors may be potentiated when present in shift workers, especially during night shifts (Bhatti et al, 2014).…”

Individual Circadian Preference, Shift Work, and Risk of Medication Errors: A Cross-Sectional Web Survey among Italian Midwives

“…For example, when comparing nurses and firefighters with day workers, sleep disturbances were more frequent in shift workers than day workers [11]. Moreover, different cardio-metabolic indices, including higher waist circumference, body mass index, fasting glucose, blood pressure, and cardio-metabolic risk score have been described in night workers [12], who also showed almost three times higher association with abdominal obesity independent of age and gender than day shift workers [13].…”