Introduction:

an association that has been widely debated in recent decades is the night shift and its potential effect on the risk of breast cancer. It has been classified as a possible carcinogen by IARC; classifying it as such in group 2 A in 2007.

Objectives:

to identify the prevalence of intrinsic and extrinsic factors associated in breast cancer in the health personnel of a Hospital of III level.

Methodology:

descriptive cross-sectional study using a self-administered survey of 49 health workers who suffered from breast cancer between 2007-2016.

Results:

average age at the time of diagnosis of 50.82, finding the highest number of cases in nurses (34.7%) and ACT (28.6%). 44.8% had performed ≥1007 nights throughout their working life, which included in 15% 6 to 7 consecutive nights over a period ≥5 years. They presented EG + / PG + receptors 66%, 27.5% had a regular night work history of 3 nights / month for more than 30 years and between 15-29 years 37.9%.

Conclusion:

currently working on changes in lifestyle to reduce the risk of breast cancer, affecting diet, exercise and trying to respect the hours of sleep.

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