Tiwo hundred and twenty one cases of breast cancer are studied in order to evaluate the presence of risk factors for breast cancer such as: early menarche (before 12 years of age) nuliparity, first delivery over 32 years of age. abscence of breast feeding, late menopause (over 55 years of age), direct family history of breast cancer (in mother or sister), and hormonal replacement therapy for more than five years.
We found that the individual association with any of these factors is less than 20%. Nuliparity was the most frequent factor with 39 cases (17,6 %), carly menarebe with 35 cases (15,8 %) and direct family history of breast cancer in 21 cases (10,4 %). The remaining risk factors were only present in less than 10 % ofthe cases.
In 50 % of the cases one or more risk factors were present.
Half of the patients showed no association with risk factors previously making it difficult the identification of the group of patients for are adecuate screening and follow up.
Pardo G., M. ., Saavedra B., M., & Sepúlveda P., S. . (1999). Aspectos Epidemiológicos en el cáncer de mama. Revista Hospital Clínico Universidad De Chile, 10(3), pp. 216–20. https://doi.org/10.5354/2735-7996.1999.80620
