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Tobacco use, knowledge of harms, and cessation support among patients with non-tobacco related cancers.

e24029 Background: Continued cigarette smoking among patients with cancer leads to numerous adverse health outcomes, even among patients with non-tobacco-related cancers such as breast, colon, and prostate cancer. Continued smoking is associated with poorer response to cancer treatment, increased risk for treatment-related toxicities, and shorter overall survival. While some patients with a smoking-related cancer make efforts to quit smoking at the time of diagnosis, patients with other forms of cancer might not understand the negative effects of continued smoking. In this study, we assessed patient knowledge of the harms of continued smoking, previous cessation attempts, and cessation support. Methods: We surveyed 102 adults with breast, colon, and prostate cancer at three locations: an NCI-designated cancer center, an urban safety-net medical center, and a rural cancer center. Patients were asked about current smoking behaviors, beliefs about the harms of continued smoking, quit attempts and resources used, and cessation support. We also surveyed seven oncologists to assess beliefs about harms of continued smoking, cessation support provided to patients, training and confidence in cessation counseling, and barriers to providing cessation support. Results: Most patients (82%) agreed or strongly agreed that continued smoking may shorten life expectancy, and 70% agreed or strongly agreed that continued smoking increased the risk of getting a different type of cancer. Only 41% of patients agreed or strongly agreed that continued smoking may cause more side effects from cancer treatment, and only 40% agreed or strongly agreed that ongoing smoking may affect treatment response. The majority of patients (86%) had tried to quit smoking for good, with an average 4.1 quit attempts per patient. Patients reported that physicians advised them to quit the majority of the time (92%), prescribed medication 33% of the time, and followed up on cessation attempts 43% of the time. Overall, oncologists had higher knowledge of the harms of continued smoking on treatment outcomes and survival. Those in practice for 20 years or more had higher confidence in cessation counseling than those in practice less than 4 years. Oncologists described lack of time and lack of confidence in cessation counseling as barriers to providing more cessation support. Conclusions: Among 102 patients with breast, colon, and prostate cancer who currently smoke, there was incomplete knowledge of the harms of continued smoking. Oncologists believe that tobacco cessation is important and frequently advise patients to quit, however they less frequently prescribe medication or follow up on cessation efforts. Interventions are needed to educate patients with cancer about the harms of continued smoking and to provide further cessation support.