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      The association between dietary fiber and infertility among US women: The National Health and Nutrition Examination Survey, 2013-2018 Translated title: La relación entre la fibra dietética y la infertilidad femenina en los Estados unidos: encuesta nacional de salud y nutrición, 2013-2018

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          Abstract

          Abstract 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.

          Translated abstract

          Resumen Antecedentes: el consumo de fibra dietética es un factor importante en la infertilidad femenina. El objetivo del estudio fue investigar si existe una relación independiente entre el consumo de fibra dietética y la infertilidad en las mujeres estadounidenses. Material y métodos: se realizó un análisis secundario del conjunto de datos de la encuesta nacional de salud y nutrición (NHANES), que abarcó tres ciclos entre 2013 y 2018. Se incluyeron 3497 participantes para el análisis de datos. Las variables independientes y dependientes asociadas fueron la ingesta de fibra dietética y la infertilidad. Las covariables incluyeron datos sociodemográficos, de los cuestionarios, dietéticos y médicos. Se realizó un análisis de regresión logística multivariada y un análisis de sensibilidad para determinar la relación entre el consumo de fibra dietética y la infertilidad. Resultados: cada aumento log10 en el consumo de fibra dietética se asoció con una reducción del 32 % en el riesgo de infertilidad (OR: 0,68; intervalo de confianza del 95 %: 0,48-0,96). En el modelo mínimo y totalmente ajustado, los resultados siguen siendo robustos. El modelo GAM y el ajuste de curvas suavizadas descartaron la posibilidad de una relación no lineal entre la ingesta de fibra dietética y la infertilidad. Los resultados muestran una correlación lineal negativa entre la ingesta de fibra dietética y la infertilidad. Conclusiones: se observó una relación lineal entre la ingesta de fibra dietética y la infertilidad. El aumento de la ingesta de fibra dietética redujo la incidencia de la infertilidad.

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          Strengthening the Reporting of Observational Studies in Epidemiology (STROBE): explanation and elaboration.

          Much medical research is observational. The reporting of observational studies is often of insufficient quality. Poor reporting hampers the assessment of the strengths and weaknesses of a study and the generalizability of its results. Taking into account empirical evidence and theoretical considerations, a group of methodologists, researchers, and editors developed the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) recommendations to improve the quality of reporting of observational studies. The STROBE Statement consists of a checklist of 22 items, which relate to the title, abstract, introduction, methods, results and discussion sections of articles. Eighteen items are common to cohort studies, case-control studies and cross-sectional studies and four are specific to each of the three study designs. The STROBE Statement provides guidance to authors about how to improve the reporting of observational studies and facilitates critical appraisal and interpretation of studies by reviewers, journal editors and readers.This explanatory and elaboration document is intended to enhance the use, understanding, and dissemination of the STROBE Statement. The meaning and rationale for each checklist item are presented. For each item, one or several published examples and, where possible, references to relevant empirical studies and methodological literature are provided. Examples of useful flow diagrams are also included. The STROBE Statement, this document, and the associated web site (http://www.strobe-statement.org) should be helpful resources to improve reporting of observational research.
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            Infertility and the provision of infertility medical services in developing countries

            BACKGROUND Worldwide more than 70 million couples suffer from infertility, the majority being residents of developing countries. Negative consequences of childlessness are experienced to a greater degree in developing countries when compared with Western societies. Bilateral tubal occlusion due to sexually transmitted diseases and pregnancy-related infections is the most common cause of infertility in developing countries, a condition that is potentially treatable with assisted reproductive technologies (ART). New reproductive technologies are either unavailable or very costly in developing countries. This review provides a comprehensive survey of all important papers on the issue of infertility in developing countries. METHODS Medline, PubMed, Excerpta Medica and EMBASE searches identified relevant papers published between 1978 and 2007 and the keywords used were the combinations of ‘affordable, assisted reproduction, ART, developing countries, health services, infertility, IVF, simplified methods, traditional health care'. RESULTS The exact prevalence of infertility in developing countries is unknown due to a lack of registration and well-performed studies. On the other hand, the implementation of appropriate infertility treatment is currently not a main goal for most international non-profit organizations. Keystones in the successful implementation of infertility care in low-resource settings include simplification of diagnostic and ART procedures, minimizing the complication rate of interventions, providing training-courses for health-care workers and incorporating infertility treatment into sexual and reproductive health-care programmes. CONCLUSIONS Although recognizing the importance of education and prevention, we believe that for the reasons of social justice, infertility treatment in developing countries requires greater attention at National and International levels.
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              Effectiveness of the US Department of Agriculture 5-step multiple-pass method in assessing food intake in obese and nonobese women.

              National surveys of food intake rely on the 24-h dietary recall method for assessing the nutrient intakes of Americans. This observational validation study was conducted under controlled conditions to test the effectiveness of the US Department of Agriculture (USDA) 5-step multiple-pass method for dietary recall; to test the ability of normal weight, overweight, and obese women to recall food intake; and to test the accuracy of macronutrient recall. Women (n = 49) aged 21-65 y with a body mass index (in kg/m(2)) of 20-45 selected all meals and snacks for 1 d from a wide variety of foods. A 24-h dietary recall with the use of the USDA 5-step multiple-pass method was administered by telephone the following day. Analysis of variance and covariance tested the overall accuracy of recall and the effect of BMI on dietary recall. As a population, the women overestimated their energy and carbohydrate intakes by 8-10%. No significant differences between mean actual and recalled intakes of energy and the macronutrients were observed in the obese women. Normal-weight and overweight women significantly (P < 0.01) overestimated their energy, protein, and carbohydrate intakes. Recalled fat intake was not significantly different from actual intake in women across the BMI range studied. The USDA 5-step multiple-pass method effectively assessed mean energy intake within 10% of mean actual intake on the previous day. Obese women more accurately recalled food intake than did overweight and normal-weight women despite undereating on the day of the study.
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                Author and article information

                Journal
                nh
                Nutrición Hospitalaria
                Nutr. Hosp.
                Grupo Arán (Madrid, Madrid, Spain )
                0212-1611
                1699-5198
                December 2022
                : 39
                : 6
                : 1333-1340
                Affiliations
                [1] Guangzhou orgnameGuangzhou University of Traditional Chinese Medicine orgdiv1The First Clinical Medical College People's Republic of China
                [2] Guangzhou orgnameGuangzhou University of Chinese Medicine orgdiv1The First Affiliated Hospital orgdiv2Department of Gynecology People's Republic of China
                Article
                S0212-16112022001000016 S0212-1611(22)03900600016
                10.20960/nh.04056
                36373676
                5f0441fa-6fe8-481f-86eb-13cb8fae344c

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 07 May 2022
                : 21 February 2022
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 72, Pages: 8
                Product

                SciELO Spain

                Categories
                Original Papers

                Estudios transversales,Cross-sectional study,Infertility,National Center for Health Statistics (US),Fibra dietética,Centro nacional de estadísticas de salud (Estados Unidos),Infertilidad,Dietary fiber

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