LAUSR

Summary Introduction Breast cancer (BC) is one of the most significant health problems among the women. Breast self-examination (BSE) is an examination method which is used by women to detect breast cancer as much early as possible. Training of women about BSE is crucial. Methods The current study was semi-experimentally single-group pretest-posttest designed in order to evaluate breast self-examination (BSE) training efficacy on Turkish women’s knowledge and skills. The study was performed on 119 Turkish women. The data were collected with a three questionnaires and BSE Training Skills Evaluation Form in three phases. Results 81.5% of the women did not perform BSE regularly. Rate of correct responses about knowledge on BC, risk factors and screening increased after posttest. Significant improvements were observed in the post-test (after training, after one month and three months training) scores for knowledge of Turkish women’ towards BC, risk factors and screening, steps of BSE after the intervention (p < 0.001). To quantify the efficiency of training, effect size (Cohen’s d) was derived. For knowledge and ability to do BSE scores, Cohen’s d was 1,01 ≤ with large effect size indicating highly effective impact of the training. Conclusions It seems that BSE training is beneficial in women. However, women should receive regular BSE training to renew their knowledge and skills. Long follow-up is required.