Trabajo Original
The association between dietary fiber and infertility among US Women: The National Health and Nutrition Examination Survey, 2013-2018
Man-Shuang Chen, Don-Ying Wang, Hui-Yu Gong, Hui-Min Zhang, Jie Gao, Song-Ping Luo
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Background: studies have shown that dietary factors are linked to female infertility, but the relation between dietary fiber consumption and infertility has not been proven. The purpose of this research was to investigate whether there is an independent association between dietary fiber intake and infertility in American women. Material and methods: a secondary analysis of the National Health and Nutrition Examination Survey (NHANES) dataset has been conducted, covering three cycles from 2013 to 2018. A total of 3,497 participants were included in the data analysis. The independent and dependent variables of interest were dietary fiber intake and infertility. Covariates included sociodemographic, questionnaire, diet, and physical examination data. Multiple logistic regression and sensitivity analyses were performed to investigate the relationship of dietary fiber intake with infertility. Results: each additional increase in log10 dietary fiber consumption was associated with a 32 % lower risk of infertility (OR, 0.68; 95 % CI, 0.48-0.96). The outcome is still robust in the minimally as well as the fully adjusted model. The possibility of a nonlinear association between dietary fiber intake and infertility was ruled out by the GAM model and smooth curve fitting. The results showed that there is an inverse linear correlation between dietary fiber intake and infertility. Conclusions: the association between intake of dietary fiber and infertility is linear, and increasing dietary fiber intake may be beneficial for lower infertility.
Palabras Clave: Cross-sectional study. Infertility. National Center for Health Statistics (US). Dietary fiber.
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