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Association between average daily television viewing time and the incidence of ovarian cancer : findings from the Japan Collaborative Cohort Study

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/72460

Title: Association between average daily television viewing time and the incidence of ovarian cancer : findings from the Japan Collaborative Cohort Study
Authors: Ukawa, Shigekazu Browse this author →KAKEN DB
Tamakoshi, Akiko Browse this author →KAKEN DB
Mori, Mitsuru Browse this author →KAKEN DB
Ikehara, Satoyo Browse this author
Shirakawa, Toru Browse this author
Yatsuya, Hiroshi Browse this author →KAKEN DB
Iso, Hiroyasu Browse this author →KAKEN DB
JACC study group Browse this author
Keywords: Ovarian neoplasms
Sedentary behavior
Cohort study
Risk assessment
Epidemiology
Issue Date: Feb-2018
Publisher: Springer
Journal Title: Cancer causes & control
Volume: 29
Issue: 2
Start Page: 213
End Page: 219
Publisher DOI: 10.1007/s10552-018-1001-8
PMID: 29340890
Abstract: Purpose: Seventy-five percent of epidemiological studies have reported that sedentary behavior is associated with ovarian cancer incidence. Although Japan has one of the most sedentary populations, with median sitting times of 7 h/day, this association has not been investigated. This study aimed to elucidate the association between average daily television (TV) viewing time, which is a major sedentary behavior, and the incidence of ovarian cancer in a large-scale nationwide cohort study in Japan. Methods: A total of 34,758 female participants aged 40-79 years without a history of cancer at baseline were included in the study. The inverse probability weighted competing risk model was used to calculate the hazard ratio (HR) and 95% confidence interval (CI) for the incidence of ovarian cancer. Results: During a median follow-up of 19.4 years, 59 participants developed ovarian cancer (ICD-10: C56), 2,706 participants developed other types of cancer, and 4,318 participants died. Participants who watched TV for ≥ 5 h/day were more likely to develop ovarian cancer than those who watched TV for < 2 h/day (HR 2.15; 95% CI 1.54-2.99). Conclusion: Our findings suggest that reducing the amount of time spent sedentarily may be beneficial for preventing ovarian cancer.
Rights: The final publication is available at link.springer.com
Type: article (author version)
URI: http://hdl.handle.net/2115/72460
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鵜川 重和

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