Soy, Isoflavone Intake Not Linked to Endometrial Cancer

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Soy food/isoflavone intake is not associated with endometrial cancer risk in Japanese women.
Soy food/isoflavone intake is not associated with endometrial cancer risk in Japanese women.

Soy food/isoflavone intake is not associated with endometrial cancer risk in Japanese women, according to a study published in BJOG: An International Journal of Obstetrics & Gynaecology.

Sanjeev Budhathoki, M.D., from the National Cancer Center in Tokyo, and colleagues conducted a prospective cohort study involving 49,121 women aged 45 to 74 years to examine the correlation between soy food/isoflavone intake and endometrial cancer risk.

Intake of soy foods and other covariates were assessed by a self-administered food frequency questionnaire, completed in 1995 to 1998. Participants responded to a five-year follow-up survey questionnaire.

During an average follow-up of 12.1 years, the researchers identified 112 newly diagnosed endometrial cancer cases.

RELATED: High Coffee Intake Linked with Lower Endometrial Cancer Risk

There was no correlation between energy-adjusted intakes of soy food and isoflavone and the risk of endometrial cancer.

Per 25 g/day increase in the intake of soy food, the multivariate-adjusted hazard ratio was 1.02 (95 percent confidence interval, 0.94 to 1.1); for an increase of 15 mg/day in isoflavone intake, the corresponding hazard ratio was 1.01 (95 percent confidence interval, 0.84 to 1.22).

"In this population-based prospective cohort study of Japanese women, we observed no evidence of a protective association between soy food or isoflavone intake and endometrial cancer risk," the authors write.

Reference

  1. Budhathoki, et al. "Soy food and isoflavone intake and endometrial cancer risk: the Japan Public Health Center-based prospective study." BJOG: An International Journal of Obstetrics & Gynaecology. DOI: 10.1111/1471-0528.12853. February 2015.

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