Breast cancer is the most common type of cancer diagnosed in women. Although much research has been conducted on physical and psychosocial adjustment after the diagnosis of the disease, little is known about how women make treatment decisions following a breast cancer diagnosis. Therefore, this study examined the information needs women have after receiving the diagnosis of breast cancer, investigated how decisions are made about treatment options, and assessed the personal responses to the decisions made. A mixed methods approach using quantitative and qualitative data was used as the research design.The sample consisted of 102 breast cancer survivors that had completed all forms of treatment for at least three months and less than five years were recruited from a Midwestern academic medical center and a Midwestern private plastic surgery practice setting. In Phase I participants completed a demographic participant information form and five questionnaires about informational needs, confidence and satisfaction with the decision, decisional regret, and conflict. In Phase II, 16 participants were purposively sampled from the 102 survivors to participate in a focus group session. Data analysis included frequencies and multiple regression for Phase I and qualitative content analysis for Phase II.Findings from the study found that the women after being diagnosed with breast cancer viewed informational needs as very important in making treatment decisions. This study has facilitated the understanding of how women make treatment decisions after being diagnosed with breast cancer. Implications for members of the treatment team are to provide the information with consideration of the patient's personal preferences that will assist women to make informed, confident, and satisfied decisions about treatment choices.v ACKNOWLEDGEMENTS