Low-Fat Dietary Modification and Risk of Ductal Carcinoma In Situ of the Breast in the Women's Health Initiative Dietary Modification Trial.

MedStar author(s):
Citation: Cancer Epidemiology, Biomarkers & Prevention. 30(9):1753-1756, 2021 09.PMID: 34187856Institution: MedStar Heart & Vascular InstituteForm of publication: Journal ArticleMedline article type(s): Journal Article | Research Support, Non-U.S. Gov'tSubject headings: *Breast Neoplasms/pc [Prevention & Control] | *Carcinoma, Intraductal, Noninfiltrating/pc [Prevention & Control] | *Diet, Fat-Restricted | Aged | Female | Follow-Up Studies | Humans | Middle Aged | Negative Results | Postmenopause | Proportional Hazards Models | Risk FactorsYear: 2021Local holdings: Available online from MWHC library: Nov 1991 - present (after 1 year)ISSN:
  • 1055-9965
Name of journal: Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive OncologyAbstract: BACKGROUND: Results of observational studies of the association between dietary fat and risk of invasive breast cancer have been inconsistent. In the Women's Health Initiative dietary modification (DM) randomized trial designed to lower fat intake, the intervention was not associated with a statistically significant reduction of overall breast cancer risk. However, the DM association with risk of ductal carcinoma in situ (DCIS) of the breast, a putative breast cancer precursor, has not been reported.CONCLUSIONS: DM aiming to reduce fat intake was not associated with altered risk of DCIS.IMPACT: These results do not provide evidence of an association between dietary fat reduction and the risk of DCIS among postmenopausal women. Copyright (c)2021 American Association for Cancer Research.METHODS: A total of 48,835 postmenopausal women, ages 50-79 years at enrollment, with no breast cancer history and >=32% of total energy intake from fat, were randomly assigned either to a dietary intervention (n = 19,541) designed to reduce total fat intake to 20% of energy and to increase vegetable, fruit, and grain consumption, or to a comparison group (n = 29,294). Cox proportional hazards models were used to estimate HRs and 95% confidence intervals for the association between the intervention and DCIS risk.RESULTS: During 18.7 years (median) cumulative follow-up, including intervention (~8.7 years) and post-intervention phases (~13.0 years), 817 DCIS cases were ascertained. No evidence of an association between the DM intervention and DCIS risk was observed overall, or by trial phase (intervention and post-intervention). Similarly, no associations were found in subgroups defined by potential risk factors for DCIS.All authors: Barac A, Chlebowski R, Crane TE, Lane DS, Manson JE, Pan K, Peila R, Rohan TE, Saquib N, Shadyab AH, Tabung FK, Wassertheil-Smoller S, Zhang ZOriginally published: Cancer Epidemiology, Biomarkers & Prevention. 30(9):1753-1756, 2021 09.Fiscal year: FY2022Digital Object Identifier: ORCID: Date added to catalog: 2021-07-26
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Item type Current library Collection Call number Status Date due Barcode
Journal Article MedStar Authors Catalog Article 34187856 Available 34187856

Available online from MWHC library: Nov 1991 - present (after 1 year)

BACKGROUND: Results of observational studies of the association between dietary fat and risk of invasive breast cancer have been inconsistent. In the Women's Health Initiative dietary modification (DM) randomized trial designed to lower fat intake, the intervention was not associated with a statistically significant reduction of overall breast cancer risk. However, the DM association with risk of ductal carcinoma in situ (DCIS) of the breast, a putative breast cancer precursor, has not been reported.

CONCLUSIONS: DM aiming to reduce fat intake was not associated with altered risk of DCIS.

IMPACT: These results do not provide evidence of an association between dietary fat reduction and the risk of DCIS among postmenopausal women. Copyright (c)2021 American Association for Cancer Research.

METHODS: A total of 48,835 postmenopausal women, ages 50-79 years at enrollment, with no breast cancer history and >=32% of total energy intake from fat, were randomly assigned either to a dietary intervention (n = 19,541) designed to reduce total fat intake to 20% of energy and to increase vegetable, fruit, and grain consumption, or to a comparison group (n = 29,294). Cox proportional hazards models were used to estimate HRs and 95% confidence intervals for the association between the intervention and DCIS risk.

RESULTS: During 18.7 years (median) cumulative follow-up, including intervention (~8.7 years) and post-intervention phases (~13.0 years), 817 DCIS cases were ascertained. No evidence of an association between the DM intervention and DCIS risk was observed overall, or by trial phase (intervention and post-intervention). Similarly, no associations were found in subgroups defined by potential risk factors for DCIS.

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