Background: Early goals of care (GOC) conversations appear to improve end of life (EOL) care in patients with advanced cancer. However, interventions to facilitate GOC conversations may be unsuccessful in changing EOL outcomes due to incomplete understanding of the components of such conversations essential to impacting EOL care. This study seeks to identify the specific components of GOC conversations between patients and oncologists that are associated with less aggressive EOL care. Methods: This was a secondary, sequential mixed-methods analysis of data collected as part of the Values and Options in Cancer Care (VOICE) study, an RCT to improve communication between patients and oncologists. We used qualitative methods to describe and quantify components of GOC conversations occurring in recorded oncology office visits. We then conducted logistic regression analyses to examine the associations between key components identified with less aggressive EOL care. Results: 107 patients who died within 1 year of the recorded visit were included for analysis. Content related to GOC conversations could be found in 80.4% of visits. Most commonly discussed content was related to treatment (72.9%), followed by prognosis (43.9%), EOL care (17.8%), and patient values and preferences (16.8%). In adjusted analyses, discussion of treatment expectation, offer of an alternative to cancer-directed treatment, and mention of hospice were significantly associated with less aggressive EOL care, OR 4.66 (p = 0.047), OR 6.09 (p = 0.008), and OR 7.60 (p = 0.046) respectively. We did not find significant association between discussion of life expectancy and EOL care. Conclusions: GOC conversations may be more effective at impacting EOL care when it includes discussion regarding treatment expectations and offer of an alternative option to cancer-directed therapy, such as hospice.