These side effects would be severe tragedies such as death or divorce of parents during childhood or adolescence and the loss of a spouse, or moderate unemployment and incidents such as the financial crisis, according to the study published by publisher online BioMed Central.
After a survey of 622 women aged 25 to 45, of which 255 were diagnosed with breast cancer and 367 were healthy, the research team found a clear link between their psychological outlook and risk of cancer breast, with results showing that women who suffered two or more traumatic events of 62 per cent had a higher risk, while optimists are 25 percent less likely to have developed the disease.
The researchers, led by Ronit Peled, Orly Siboni Samocha and Ilana Shoham-Vardi of Ben-Gurion University and Devora Carmi of the University of Haifa, as well as exposure to more than one event is positively associated with the breast cancer, while a general feeling of happiness and optimism has a "protective effect".
The research team suggested that psychological stress could contribute to increased risk by changing the cellular responses to environmental factors, while adding that the mechanism is still "not fully understood."
Meanwhile, the team called for further studies in this area, and suggested possible prevention initiatives must be developed.
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