Author Affiliations: Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland (Dr Ballard-Barbash); and Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington (Dr Neuhouser).
As of 2006, an estimated 11 400 000 adults and children were living with cancer in the United States, and that number is estimated to increase to nearly 17 000 000 by 2020.1 This increase in the number of persons living with cancer as a chronic condition has also stimulated interest in understanding whether health habits such as diet, physical activity, or weight control may result in beneficial effects on cancer survival.
Ballard-Barbash R, Neuhouser ML. Challenges in Design and Interpretation of Observational Research on Health Behaviors and Cancer Survival. JAMA. 2009;302(22):2483–2484. doi:https://doi.org/10.1001/jama.2009.1807
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