BREAST CANCER: The Sun, Reducing The Risk Factor?

Time spent outdoors or in open air during the different periods of life and the

extent of estimated production of vitamin D, linked to sun exposure is associated with a reduced risk of breast cancer. This Canadian study explained the women who spend three hours a day in sunlight face half risk of developing breast cancer than others. The study published in the American Journal of Epidemiology, calls for a reasonable exposure to the sun for its vitamin D.

The Ontario study compared the amount of time spent outdoors during four periods of life, adolescence, 20 to 30 years, 40 to 50 years and 60 to 75 years for women who developed breast cancer and women of similar age without breast cancer. The researchers compared the risk of breast cancer in women who have spent less than 6 hours outside per week, with women who spend more than 21 hours off per week and that, for each period of life. They found that women who have spent more time "outside" have a reduced risk of 26-50% of breast cancer.

This study examined whether there was a significant association between vitamin D production and risk of breast cancer due to sun exposure. Researchers refer to recent studies that suggest that vitamin D may be associated with a reduced risk of breast cancer. The researchers used data from a cohort study, Ontario Women's Diet and Health Study. The researchers contacted a total of 3101 women who reported cancer in 2003 and 2004. These participants completed a questionnaire on risk factors for breast cancer and were asked about the variables in the sun during the four periods of their life (exposure, protection, latitude, longitude ...). Each woman received a score of "vitamin D" for four periods of his life.

Main results: The average age of women in the study was 56 years. Most women were postmenopausal (68% and 64% of controls). The researchers compared cancer risk between women who spent most of the time outdoors (more than 21 hours per week) and those who spent less time outdoors (less than 6 hours).

- Women who have spent more time outside in their teenage years have a 29% lower risk of breast cancer than those who spent less time outdoors (OR 0.71, CI: 95% 0.60 to 0.85).

- Women of 20 to 30 years age who spend more time outside have reduced risk of 36% (OR 0.64, CI 95% 0.76 to 0.53).

- Spend more time outside from 60 to 75 years implies a reduced risk of breast cancer by 50% (OR 0.50, CI 95% 0.66 to 0.37).

Source: Online Articles

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