A recent 가라오케 구인구직 study analysed data on almost four million women, looking at associations between working a long-term shift job and the risk of almost a dozen types of cancer. When looking at the specific types of cancer, researchers found women had increased risks for skin (41%), breast (32%), and gastrointestinal (18%) compared to women who did not have long-term night-shift jobs.
In one study conducted among Korean women, another study, based on a Generations Study cohort, demonstrated no link between night-shift work and increased risk for developing breast cancer (BC). A recent study found that prolonged night shift work in women increased cancer risk by 19%. In our new study, we found no overall association between women who had done night-shift jobs over the past decade and their risk of developing breast cancer — no matter what type of job they did involving night shifts, or what age they started doing those jobs.
When researchers in China looked more closely at what types of cancer women were getting, they found women who had worked long-term nights shifts had 41% higher risks of skin cancer, 32% higher risks of breast cancer, and an 18% higher risk of digestive system cancer than women who had not worked nights. The risks women nurses face does not necessarily mean women who worked night shifts were more susceptible to developing cancer, notes Suelei Ma. Evidence from earlier studies suggests women, particularly those working rotundas of overnight shifts, are likely to have increased coronary heart risk: Some statistics have reported womens risks increased by up to 40% just due to work stress.
Past studies link working late nights with increased risks for type-2 diabetes, heart disease, and cancer. Those who work regular late-night shifts are subjected to a lack of adequate sleep and nighttime waking, which may damage the structure of human DNA and contribute to a number of diseases, including cancer and diabetes, and cardiovascular, neurological, and lung diseases. Night-shift work may impact the functioning abilities of women more than men, suggests one study comparing performance between men and women following a 28-hour-a-day schedule which delayed their sleep-wake cycles until they were not synced to their internal 24 hour-a-day body clock.
Since the 1970s, a potential link between shift work and increased risk of breast cancer has been suggested to be explained by the fact that nighttime exposure to light can disturb the internal body clock, potentially suppressing the sleep hormone melatonin and increasing levels of oestrogens in the body. A statistically significant trend was found with respect specifically to mean number of hours worked per week during the night, but there was no association observed with any other variables related to shift work during the night and breast cancer risk, and the findings regarding hours worked per week alone are not supported by prior evidence or any proposed biological explanation. In our study, it is noteworthy that associations of night shift work with metabolic risk factors and immune cell counts were particularly present or higher for a group of night shift workers who had a higher night shift work frequency per month (i.e.
Potentially, night shift jobs increased the probability of receiving fertility treatments among younger women, aged up to and including 35 years, by approximately 27-40%, depending on the reference group, but associations were not observed among women aged more than 35 years, compared to day workers. This study investigated whether women working nights were more likely to have their first child with their fertility-treatment-required compared with non-required women, if they had specific diagnoses of infertility, and whether this association was specific to the ages. In the study, conducted in Canada, the Levin equation was applied to estimate the proportion of the population attributable to night shifts or rotating schedules in women working nights or rotating schedules from 1961-2000.
In a prospective study involving couples attending fertility centres, women working night/night/rotating shifts had significantly lower oocyte yields after controlled ovarian stimulation than day workers, but there were no differences on measures of ovarian reserve, such as antral follicle count and follicle stimulation hormone (40). In another case-control study of Norwegian nurses, the intensity and duration of evening shifts were associated with shortening telomeres, which could have contributed to the increased risk for BC in women working rota shifts. The researchers–led by Dr. Michael Jones and Professor Anthony Swerdlow from the Institute for Cancer Research (ICR)–also found no significant differences in risk by the type of night-shift job, age at which women started working in the evening shift, or whether night-shift jobs started before or after their first pregnancies.
Examination of the perinatal records showed that smoking did not affect associations between night shift work and endometriosis or menstrual abnormalities, as it was unrelated to those diagnoses (and therefore, the estimates of effect did not change when including smoking in multivariate analyses). Using multiplicative interaction analysis as well as additive analysis, we assessed whether associations between rotating night shift job length and type 2 diabetes were different depending on number of unhealthy lifestyle factors.2930 We tested whether multiplicative interactions were present by including the cross-product terms between rotating night shift job length and the number of unhealthy lifestyle indicators in our fully adjusted multivariate models. Our findings are in line with a population-based Danish study investigating age-standardized differences in female fertility treatment rates by sector, finding that hospital workers–among whom rotating night shifts are common–are substantially more likely to have had a pregnancy procedure compared to other women with an economic role.
This finding may partly stem from social factors, such as household obligations, that lead women to work longer hours and get less sleep during their days off compared with men. It may be the particular conditions of family life and/or economic needs that have forced some women into taking on nightshifts or jobs. Women who are working professionally may not recognize the different ways in which the stresses of the job affect them than men.