Effet des longues heures de travail sur la rigidité artérielle dans une étude de cohorte prospective de travailleurs cols blancs de la région de Québec

Authors: Braga Sisti, Carolina
Advisor: Trudel, XavierGilbert-Ouimet, Mahée
Abstract: Background: Few studies have examined the effect of long working hours on arterial stiffness, a known predictor of cardiovascular diseases. To our knowledge, no prospective studies have examined whether repeated exposure to long working hours is associated with increased arterial stiffness in older age. Objectives: To examine the association between long working hours, assessed repeatedly over the working life, and arterial stiffness, assessed at the end of a 24-year follow-up among white-collar workers. Methods: The prospective cohort was composed of 9188 white-collar workers from 19 organizations in the Quebec City region. This prospective cohort was followed at three different periods: At baseline (1991-1993) (T1), after 8 years (1999-2001) (T2) and after 24 years (2015- 2018) (T3). Long work hours (≥41 hours/week) were measured at T1 and at T2. Repeated exposure was defined as working long hours at both times. Arterial stiffness was measured in 2015-2018 (T3) in a random sample of participants. The final study sample was composed of 1,855 participants. Results: Among still-working workers at T3, repeated exposure to long working hours at T1 and T2 was associated with higher arterial stiffness (+1.43 m/s, 95% CI: 0.73- 2.15), after adjustment for sociodemographics, lifestyle-related risk factors, cardiovascular risk factors and psychosocial stressors at work. No association between prior exposure to long working hours and arterial stiffness was observed among those who were retired at the time of outcome assessment (T3). Conclusion: The study suggests that workers of older age that were exposed to long working hours repeatedly during their professional lives could have higher arterial stiffness. Primary prevention measures aimed at reducing working hours could be considered to reduce cardiovascular risk before the development of cardiovascular diseases.
Document Type: Mémoire de maîtrise
Issue Date: 2022
Open Access Date: 25 April 2022
Permalink: http://hdl.handle.net/20.500.11794/73225
Grantor: Université Laval
Collection:Thèses et mémoires

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