Body Mass Index (Bmi), Health Behaviors, And Perceptions In Cancer Survivors.

97Background: Obesity is associated with poorer outcomes across multiple cancer types. Health behaviour change (smoking cessation, physical activity (PA) and alcohol moderation) can improve both obesity and outcomes among cancer survivors. Methods: Cancer patients (pts) were cross-sectionally surveyed on their smoking, PA and alcohol use before and after diagnosis and their perceptions of these behaviours on quality of life (QoL), fatigue, survival (OS) and safety. Multivariable logistic regression models evaluated the association of BMI 1 year prior to diagnosis with behaviour changes and perceptions. Results: Of 1269 pts, 204 smoked at diagnosis and 58% quit afterwards; 350 met PA guidelines at diagnosis and 238 at follow-up; 661 drank alcohol at diagnosis and 50% reduced consumption afterwards. Median BMI was 25.8 (22% obese). Most pts perceived PA ( u003e 75%) as improving outcomes, smoking ( u003e 70%) as worsening outcomes and half (41-49%) felt alcohol worsened outcomes. At diagnosis, increased BMI was ass...