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

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


Objective: 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)).

Methods: 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.

Results: 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.

Conclusions: 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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Algorithms
  • Colorectal Neoplasms / epidemiology*
  • Colorectal Neoplasms / rehabilitation
  • Female
  • Humans
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Population
  • Prospective Studies
  • Survivors / statistics & numerical data*
  • Television / statistics & numerical data*
  • Time Factors
  • Weight Gain / physiology*
  • Young Adult