According to one study, working more than nine hours a day could increase the risk of depression for women, but not for men.
Women who worked much longer, more than 55 hours a week, had 7.3% more depressive symptoms than women working between 35 and 40 hours a week.
However, the same was not the case in men, according to the study.
"It's an observational study. Although we can not determine the exact causes, we know that many women have to take on a larger share of domestic work than men, resulting in total hours of work, overtime and overwhelming responsibilities. " said senior researcher Gill Weston, a postdoctoral student at University College London.
"In addition, women who work most weekends tend to be concentrated in low-paying jobs in the service sector, which are linked to higher levels of depression," said Weston.
For the study, published in the Journal of Epidemiology and Community Health, the team had 11,215 workers and 12,188 workers.
The study also showed that work at the weekend was linked to a higher risk of depression among men (3.4%) and women (4.6%).
Two-thirds of men worked on weekends compared to half of women. Those who worked almost all weekends were more likely to be in low-skilled jobs and were less satisfied with their jobs and earnings than those who worked only during the week or on weekends.
"We hope our results will encourage employers and policymakers to think about how to reduce burdens and increase support for women who work long or irregular hours – without restricting their ability to work when they wish it, "said Weston.
"More comprehensive work practices could benefit both workers and employers of both sexes," she suggested.
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