Prospective cohort study on television viewing time and incidence of lung cancer: findings from the Japan Collaborative Cohort Study

Cancer Causes Control. 2013 Aug;24(8):1547-53. doi: 10.1007/s10552-013-0231-z. Epub 2013 May 18.


Purpose: To ascertain whether prolonged television viewing time was associated with lung cancer incidence in Japanese adults aged 40-79 years from a nationwide large-scale cohort study.

Methods: A total of 54,258 adults (23,090 men and 31,168 women) without a history of cancer at baseline (1988-1990) were enrolled and followed for a median of 15.6 years. The Cox proportional hazard model was used to calculate hazard ratios (HRs) and 95 % confidence interval (CI) for lung cancer according to television viewing time adjusted for age and other possible confounding factors.

Results: During the study period, 798 participants were diagnosed with lung cancer. The HR of male participants who watched television for more than 4 h daily was 1.36 (95 % CI 1.04-1.80) compared with <2 h/day.

Conclusion: Our findings suggest that reducing the amount of time spent watching television may be beneficial for preventing lung cancer.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Female
  • Follow-Up Studies
  • Humans
  • Incidence
  • Japan / epidemiology
  • Lung Neoplasms / epidemiology*
  • Male
  • Middle Aged
  • Prognosis
  • Prospective Studies
  • Sedentary Behavior*
  • Television / statistics & numerical data*
  • Time Factors