Impact of smoking on health system costs among cancer patients in a retrospective cohort study in Ontario, Canada

OBJECTIVE: Smoking is the main modifiable cancer risk factor. The objective of this study was to examine the impact of smoking on health system costs among newly diagnosed adult patients with cancer. Specifically, costs of patients with cancer who were current smokers were compared with those of non-smokers from a publicly funded health system perspective. METHODS: This population-based cohort study of patients with cancer used administrative …