Take a look at the Behavioral Insights Team publications. 

www.cabinetoffice.gov.uk 

Are you look for risk factors in people with cancer or are you looking at outcomes of cancer in people with specific behaviors? 

If you are looking at the former: Parkin, M., et al., The fraction of cancer attributable to lifestyle and environmental factors in the UK in 2010. BJC 2011. 105(Supp 2): S38-S41. 

Ganna A, Ingelsson E. 5 year mortality predictors in 498 103 UK Biobank participants: a prospective population-based study. Lancet. 2015 Jun 2. pii: S0140-6736(15)60175-1. doi: 10.1016/S0140-6736(15)60175-1. [Epub ahead of print]

http://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736%2815%2960175-1.pdf

Fisher A, Williams K, Beeken R, Wardle J. Recall of physical activity advice was associated with higher levels of physical activity in colorectal cancer patients. BMJ Open. 2015 Apr 28;5(4):e006853. doi: 10.1136/bmjopen-2014-006853.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4420935/pdf/bmjopen-2014-006853.pdf

Julian-Reynier C, Bouhnik AD, Evans DG, Harris H, van Asperen CJ, Tibben A, Schmidtke J, Nippert I. General Practitioners and Breast Surgeons in France, Germany, Netherlands and the UK show variable breast cancer risk communication profiles. BMC Cancer. 2015;15:243. doi: 10.1186/s12885-015-1281-2.

http://www.biomedcentral.com/content/pdf/s12885-015-1281-2.pdf

Stead M, Craigie AM, Macleod M, McKell J, Caswell S, Steele RJ, Anderson AS. Why are some people more successful at lifestyle change than others? Factors associated with successful weight loss in the BeWEL randomised controlled trial of adults at risk of colorectal cancer. Int J Behav Nutr Phys Act. 2015;12:87. doi: 10.1186/s12966-015-0240-2.

http://www.ijbnpa.org/content/pdf/s12966-015-0240-2.pdf

Blanks RG, Benson VS, Alison R, Brown A, Reeves GK, Beral V, Patnick J, Green J. Nationwide bowel cancer screening programme in England: cohort study of lifestyle factors affecting participation and outcomes in women. Br J Cancer. 2015;112(9):1562-7. doi: 10.1038/bjc.2015.69.

http://www.nature.com/bjc/journal/v112/n9/full/bjc201569a.html

Williams K, Beeken RJ, Fisher A, Wardle J. Health professionals' provision of lifestyle advice in the oncology context in the United Kingdom. Eur J Cancer Care (Engl). 2015;24(4):522-30. doi: 10.1111/ecc.12305.

http://onlinelibrary.wiley.com/doi/10.1111/ecc.12305/abstract;jsessionid=2D79C9B54A294852C70DA93A2399394C.f02t03