Background: Breast self-examination is one of the primitive methods to diagnosis of breast cancer as one of the health problems in
the world. Breast self-examination as a low costs and simple method that can be performed without the need for health personnel,
can increase patient’s survival chance through primitive diagnose of disease with more accurate diagnostic follow up. Considering
the importance of breast self-examination, this study was conducted to determine an effective factor on breast self-examination
among Tehranian women in 2018. Methods: In this Cross-sectional Study We surveyed a total of 859 women from Tehran that were
participated in the study during the autumn 2018 about factors associated with Breast self-examination. Participant ages ranged
from 30 to 65 years. Binary Logistic regression model was used to examine the relationship between Breast self-examination and a
set of predictive variables. Result: Study result showed that 42.1% of participant performed breast self- examination at least once in
their lifetime. associated with self-examination Multivariable model shows that age (OR=1.816; 95%CI=1.084-3.044), home status
(OR=.430; 95%CI=.289-.640), ethnicity (OR=.638; 95%CI=.448-.90),birth place (OR=.502; 95%CI=.247-.968), marital status (OR=4.321;
95%CI=1.478-12.629), job status (OR=3.894; 95%CI=1.464-10.363), income (OR=2.023; 95%CI=1.066-3.840), Problem in breast
(OR=.161; 95%CI=.110-.237), Preventive behaviors of breast cancer (OR=5.864; 95%CI=2.445-14.062) were predictive behaviors of
breast self- examination. Conclusion: Findings suggested the requirement of increasing self - examination and enforcing Preventive
behaviors of breast cancer with society-based education. Efforts to enhance literacy level and awareness of breast self-examination
through educational interventions, media plans, and academic environments such as school and university should be one of the
priorities in the field of breast cancer prevention in metropolitans and societies.
Keywords: Breast Cancer, Screening, Breast Self-Examination, Breast Health Behavior