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Cancer Causes Control. 2009 Oct;20(8):1355-62. doi: 10.1007/s10552-009-9356-5. Epub 2009 May 17.

Television viewing time and weight gain in colorectal cancer survivors: a prospective population-based study.

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  • 1MRC Epidemiology Unit, Institute of Metabolic Science, Addenbrooke's Hospital, Hills Road, P.O. Box 285, Cambridge, CB2 0QQ, UK.



To investigate the prospective relationships between television viewing time and weight gain in the 3 years following colorectal cancer diagnosis for 1,867 colorectal cancer survivors (body mass index (BMI) > or = 18.5 kg/m(2)).


BMI, television viewing time, physical activity, and socio-demographic and clinical covariates were assessed at baseline (5 months), 24 months and 36 months post-diagnosis. Multiple linear regression was used to study independent associations between baseline television viewing time and BMI at 24 and 36 months post-diagnosis.


At both follow-up time points, there was a significant increase in mean BMI for participants reporting > or =5 h/day of television viewing compared to those watching <3 h/day at baseline (24 months: 0.72 kg/m(2) (0.31, 1.12), p < 0.001; 36 months: 0.61 kg/m(2) (0.14, 1.07), p = 0.01), independent of baseline BMI, gender, age, education, marital status, smoking, cancer site, cancer disease stage, treatment mode and co-morbidities. Additional adjustment for baseline physical activity did not change results.


These findings suggest that a greater emphasis on decreasing television viewing time could help reduce weight gain among colorectal cancer survivors. This, in turn, could contribute to a risk reduction for co-morbid conditions such as type 2 diabetes and cardiovascular disease.

[PubMed - indexed for MEDLINE]
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