<![CDATA[Breast cancer is the leading cause of death for women in Indonesia with an increasing incidence rate. One method of early detection is Breast Self-Examination (SADARI), but this practice is still minimal among adolescent girls due to lack of education. This study aims to analyze the relationship between knowledge, attitudes, and actions of SADARI with the effectiveness of early detection of breast cancer in students of SMK Kesehatan Bali Dewata. With a cross-sectional design, the study involved 71 female students through proportional random sampling technique. Data were collected through questionnaires assessing knowledge, attitudes, and actions of SADARI. The results showed that 36.6% of respondents had sufficient knowledge and 45.1% had a positive attitude, but only 32.4% performed SADARI correctly and regularly. SADARI knowledge and action were significantly associated with early detection of breast cancer (p=0.000 and p=0.045), while attitude showed no significant correlation (p=0.090). In conclusion, awareness of SADARI is quite high, but the practice is still less than optimal. The behavioral recommendation for self-breast examination as an early detection of breast cancer is that the use of interactive educational media on the internet can help increase awareness and skills for self-examination.Keywords: Health behavior; Breast self-examination; Early detection]]>
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