The change of night shifts may increase somewhat the risk of heart disease in women, according to a new study.
The study, published in the journal JAMA, found that women who have been working for the past 10 years or more in changing night shift develop 15 to 18 percent higher risk of heart disease (CHD), the most commonly known heart disease.
There are multiple risk factors at work to cause heart disease, such as poor diet, smoking, sedentary lifestyle and increased body mass index. However, despite controlling these risk factors, researchers still found an increased risk of coronary heart disease-related changes in work shifts said a lead author Celine Vetter, of Brigham United States and Women’s Hospital.
The researchers studied the relationship between the change of shift work at night and heart disease, using information from the long-term Nurses’ Health Study I and II, which has followed the work of 240,000 nurses in a span of 24 years.
The study involved 189,000 nurses who worked rotating night shifts and reported working on at least three night shifts per month in addition to morning and afternoon shifts.
Nurses also revealed his state of heart health, referring to the fact that if they had an angiogram that showed induced chest pain, heart disease, a heart attack or cardiovascular conditions such as coronary artery graft surgery, angioplasty or stents.
In the case of death or an attack on the self-reported heart, information was approved by death certificates and medical records to ensure that the incident was related to heart disease.
Through questionnaires also collected date in obvious risk factors of coronary disease every two to four years throughout the investigation period.
Over a span of 24 years, took more than 10,000 new cases of coronary heart disease developed place.
The evaluation suggests that the increasing years of night rotating shifts were connected with “statistically significant but small absolute increase” in risk of coronary heart disease.
In addition, the researchers also found that recent night shifts may be more relevant for the development of CHD risk and increased time since the work was left shift is connected with risk reduction of heart disease.
Vetter said their study results are in sync with other findings; however, it is possible that changing work schedules could lead to a different risk, and do not have much information on exact working hours as well as the start and end of work. However, they believe that their study results highlight the need for further research.