The number of cancer survivors increases and their risks of recurrence, second cancer, morbidity and death is high; measures to prevent these risks are thus critical. Knowing the factors that lead cancer survivor to adopt or not healthy behaviours is crucial for designing effective prevention campaigns and better support them in after-cancer. Our study attempts to provide additional knowledge in this direction.

This retrospective study was conducted via the Seintinelles collaborative research platform in a community of women with cancer volunteering to take online questionnaires. We collected data on sociodemographic factors and health, knowledge of cancer risk factors, and possible behaviour changes (tobacco/alcohol use, diet, physical activity) after cancer diagnosis.

The study involved 1180 women aged between 26 and 79 years. Several cancer-related factors (cancer other than breast cancer, longer time since diagnosis, taking drug treatment for cancer, sequelae, negative evolution of the cancer) favoured certain positive changes in behaviour. Sociodemographic factors (age, habitat environment, currently employed, living status, dependent children) or factors related to health (general condition, presence of comorbidities, neurological problems, hospitalizations, body mass index) favoured or not certain changes in behaviour. Lack of knowledge about modifiable risk factors for cancer was associated with not adopting healthy behaviours after cancer.

This study made it possible to identify important elements to be addressed in order to improve cancer risk prevention messages.