Youseflu S, Jahanian Sadatmahalleh SH, Mottaghi A, Kazemnejad A. Dietary Phytoestrogen Intake and The Risk of Endometriosis in Iranian Women: A Case-Control Study.
INTERNATIONAL JOURNAL OF FERTILITY & STERILITY 2019;
13:296-300. [PMID:
31710190 PMCID:
PMC6875851 DOI:
10.22074/ijfs.2020.5806]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 05/04/2019] [Indexed: 02/03/2023]
Abstract
Background
Endometriosis is an important gynecologic disease affecting reproductive-age women. Based on the
effect of phytoestrogens on inflammatory, immunological and hormonal factors, limited studies have suggested that
phytoestrogen consumption could probably modulate endometriosis risk. The aim of this study was to evaluate the
relationship between phytoestrogen intake and endometriosis risk.
Materials and Methods
In the present case-control study, 78 women with a laparoscopically confirmed endome-
triosis and 78 normal pelvis women (as the control group), were recruited. Common dietary intake was recorded by a
validated 147-item semi-quantitative food frequency questionnaire (FFQ). Type of phytoestrogen in each dietary item
was analyzed by the database from the United States Department of Agriculture (USDA). A logistic regression model
was used to determine the association between phytoestrogen intake and endometriosis risk.
Results
Higher intake of total phytoestrogen (P-trend=0.01), total isoflavones (P-trend=0.002) specially formononetin
(P-trend=0.04) and glycitein (P-trend=0.04), total lignan (P-trend=0.01) specially secoisolariciresinol (P-trend=0.01)
and lariciresinol (P-trend=0.02) and matairesinol (P-trend=0.003), and total coumestrol [third quartile odds ratios
(OR): 0.38; 95% confidence intervals (CI): 0.15-0.96; P-trend=0.1] was related to reduced endometriosis risk. Among
food groups, only isoflavin (OR: 0.48; 95% CI: 0.44-0.63), lignan (OR: 0.66; 95% CI: 0.62-0.94), coumestrol (OR:
0.64; 95% CI: 0.51-0.99), phytoestrogen (OR: 0.46; 95% CI: 0.38-0.83) in dairy products and coumestrol in fruits
(OR: 0.69; 95% CI: 0.03-0.77) were negatively associated with endometriosis risk.
Conclusion
Phytoestrogens have a major impact on the level of hormones, and immune and inflammatory markers;
thus, it can play an important role in the control and prevention of many diseases. Due to the inflammatory nature of
endometriosis and the effect of hormones on the progression of the disease, the role of phytoestrogens consumption in
the progression and regression of the disease should be assessed in future works.
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