Ahmad Jayedi

Ahmad Jayedi
Semnan University of Medical Sciences | SUMS · Social Determinants of Health Research Center

PhD Student

About

85
Publications
10,959
Reads
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1,385
Citations
Citations since 2017
85 Research Items
1385 Citations
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20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
Introduction
I currently work at Semnan University of Medical Sciences, Semnan, Iran. I'm a PhD student in nutrition at Tehran University of Medical Sciences, and interested in nutrition epidemiology and diet-disease associations.
Additional affiliations
January 2017 - May 2018
Semnan University of Medical Sciences
Position
  • Researcher
September 2014 - September 2017
Tehran University of Medical Sciences
Position
  • Master's Student

Publications

Publications (85)
Article
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Background: Breast cancer (BC) is the most common cancer in women. The incidence and morbidity of BC are expected to rise rapidly. The stage at which BC is diagnosed has a significant impact on clinical outcomes. When detected early, an overall 5-year survival rate of up to 90% is possible. Although numerous studies have been conducted to assess th...
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Background This study aimed to evaluate the association of meals-specific food-based dietary inflammatory index (FDII), with cardiovascular (CVD) risk factors and inflammation among Iranian adults. Methods In this cross-sectional study, we recruited 816 participants living in Tehran via two-staged cluster sampling. Three non-consecutive 24-h dieta...
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Purpose This study aimed at quantifying and ranking the effects of different foods or food groups on weight loss. Methods We searched PubMed, Scopus, Cochrane Central Register of Controlled Trials, and Embase to April 2021. We included randomized trials evaluating the comparative effects of two or more food groups, or compared a food group against...
Article
We performed a systematic review and dose-response meta-analysis of randomized trials on the effects of olive oil consumption on blood lipids in adults. A systematic search was performed in PubMed, Scopus, and Web of Science databases until May 2021. Randomized controlled trials (RCT) evaluating the effect of olive oil intake on serum total cholest...
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Purpose We aimed to assess the long-term association of total, heme, non-heme, and supplemental iron intake and risk of type 2 diabetes (T2D). Methods PubMed, Scopus, and Web of Science were searched to October 2021. Two researchers extracted data in duplicate and rated the certainty in the estimates using the GRADE approach. Random-effects models...
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Objective: To examine the dose-dependent influence of oral ALA supplementation on cardiometabolic risk factors in type 2 diabetes (T2D) patients. Design: We followed instructions outlined in the Cochrane Handbook for Systematic Reviews of Interventions and the Grading of Recommendations, Assessment, Development, and Evaluation Handbook to conduct o...
Article
Objective: We conducted a systematic review and dose-response meta-analysis to investigate the association between body mass index (BMI) and primary headache disorder subtypes and to clarify the shape of this relationship. Methods: PubMed and Scopus were searched from inception to September 2020. Observational studies reporting the risk estimate...
Article
Background/objectives: We aimed to evaluate the relationships between body fat percentage (BF%), fat mass (FM), fat mass index (FMI) and visceral (VAT) and subcutaneous adipose tissue (SAT) with risk of all-cause mortality. Methods: We did a systematic search in PubMed, Scopus, and Web of Science to June 2021. We selected prospective cohorts of...
Article
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Purpose Previous meta-analyses assessed the association of adherence to the Mediterranean dietary pattern (MedDiet) with the risk of type 2 diabetes (T2D). Since then, new large-scale cohort studies have been published. In addition, dose–response relation was not previously investigated and the certainty of evidence was not assessed. We aimed to ex...
Article
The objective of this study was to investigate the effect of protein and/or amino acid supplementation on muscle mass and strength in a healthy population. A structured literature search was conducted from database inception up to October 23, 2019, using PubMed and Scopus. Data were collected from randomized controlled trials and weighted mean diff...
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Background Carbohydrate restriction is effective for type 2 diabetes management. Objectives We aimed to evaluate the dose-dependent effect of carbohydrate restriction in patients with type 2 diabetes. Methods We systematically searched PubMed, Scopus, and Web of Science to May 2021 for randomized controlled trials evaluating the effect of a carbohy...
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Background: Previous meta-analyses indicated that aerobic exercise can improve glycemic control. However, the optimum dose of exercise is still being discussed. Objective: The aim of this study was to examine the dose-dependent effect of supervised aerobic training (SAT) on glycated hemoglobin (HbA1c). Methods: We searched PubMed, Scopus, and Web...
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A dietary diversity score (DDS) may be a useful strategy for monitoring risks associated with chronic diseases. Few studies have investigated the relationship between DDS and the progression to chronic kidney disease (CKD). A better understanding of the relationship between DDS and diabetic nephropathy (DN) may provide insight for monitoring the ov...
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Objective We aimed to assess the potential association of dietary (DIS) and lifestyle inflammation score (LIS) and their joint association (DLIS) with cardiorespiratory fitness (CRF) in Tehranian adults. Design The present study was designed cross-sectional. Participants A total of 265 males and females aged 18–70 years (mean ± SD: 36.9 ± 13.3) w...
Article
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Aflatoxins are secondary carcinogenic fungal metabolites derived from the toxic various Aspergillus species. These fungi can easily infect nuts and grains. A global systematic review was done to extract data on the concentration of aflatoxins in different nuts. Besides, risk assessment was conducted on data. The scientific databases were searched s...
Article
We conducted the present systematic review and meta-analysis to evaluate the association of total protein, animal protein and animal protein sources with risk of kidney stones in the general population. A literature search was performed on PubMed/Medline, Scopus and EMBASE up to July 2021. We assessed the credibility of evidence based on NutriGrade...
Article
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We did this study to clarify the association between carbohydrate intake and the risk of type 2 diabetes (T2D) and potential effect modification by geographical location. PubMed, Scopus and Web of Science were searched to find prospective cohort studies of dietary carbohydrate intake and T2D risk. A random-effects dose–response meta-analysis was pe...
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Objective Prospective cohort studies on coffee, tea and caffeine in relation to the risk of rheumatoid arthritis (RA) have shown conflicting results. The aim of this study was to conduct a dose–response meta-analysis of cohort studies on the association between dietary caffeine, different types of coffee and tea consumption and the risk of RA. Met...
Article
Background: We aimed to systematically review the literature and test the dose-response relationship between adherence to the Mediterranean diet (MedDiet) and values of bone mineral density (BMD) in adults. Methods: Relevant observational studies were selected through searching PubMed, Scopus, and Web of Science databases up to March 4, 2021. A...
Article
We aimed to perform an umbrella review of systematic reviews and meta-analyses (SRMAs) of randomized clinical trials (RCT) of the effects of long-chain omega-3 fatty acid supplementation in pregnancy, lactation, and infancy. We searched PubMed, Scopus, and Web of Science to November 2020. Two independent investigators extracted the information, eva...
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Objective To present a comprehensive review of the association between measures of body weight, waist, and fat, and different ratios of these measures, and the risk of type 2 diabetes. Design Systematic review and dose-response meta-analysis of cohort studies. Data sources PubMed, Scopus, and Web of Science up to May 2021. Review methods Cohort stu...
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The aim of the current review was to explore the association between various dietary antioxidants and the risk of developing Parkinson's disease (PD). PubMed, Scopus, Web of Science, and Google Scholar were searched up to March 2021. Prospective, observational cohort studies, nested case-control, and case-control designs that investigated the assoc...
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Background: Uncertainty remains about the optimum step count per day for health promotion. Objective: We aimed to investigate the association between step count per day and all-cause mortality risk. Methods: PubMed, Scopus, and ISI Web of Science were searched to January 2021 to find prospective cohort studies of the association between device-bas...
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Recent individual studies have demonstrated that consumption of ultra-processed food (UPF) may be related to type two diabetes mellitus (T2DM). We aimed to synthesize the results from these individual studies by conducting an updated systematic review and meta-analysis of observational studies evaluating the association between UPF consumption and...
Article
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We aimed to summarize the associations between food sources of fructose and cardiovascular diseases (CVD), cancer, and all-cause mortality risk using a systematic review and meta-analysis. We searched PubMed, Scopus, and Web of Science up to November 2020. We included cohort studies that investigated the relationship between mortality risk (all-cau...
Article
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Background Gaussian graphical model (GGM) has been introduced as a new approach to identify patterns of dietary intake. We aimed to investigate the link between dietary networks derived through GGM and obesity in Iranian adults. Method A cross-sectional study was conducted on 850 men and women (age range: 20–59 years) who attended the local health...
Article
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Objective: We aimed to evaluate the association between the dietary and lifestyle inflammation score (DLIS) and metabolic syndrome (MetS) and its components in a sample of Iranian adults. Design: Population-based cross-sectional study. Setting: General adult population living in Tehran, Iran. Subjects: We included 827 adult men and women with an ag...
Preprint
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Objective: Prospective cohort studies on coffee, tea and caffeine in relation to the risk of rheumatoid arthritis (RA) have shown conflicting results. The aim of this study was to conduct a dose–response meta-analysis of cohort studies on the association between dietary caffeine, different types of coffee and tea consumption and the risk of RA. Met...
Article
Purpose This systematic review and dose-response meta-analysis of observational studies was conducted to summarize available findings on the association between fruits and vegetables (FVs) consumption and risk of frailty. Methods Online databases including Medline, Scopus, and Embase were searched to detect related publications up to February 202...
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Background Several studies have investigated the association between dietary protein and the risk of diabetic nephropathy (DN); however, there is no agreement on the type of dietary protein sources that might increase the risk of DN. This study was conducted to investigate the associations between different protein sources and the odds of DN develo...
Article
Objective We aimed to assess the individual and joint association of serum vitamin D and cardiorespiratory fitness (CRF) with obesity and metabolic syndrome (MetSyn). Design A cross-sectional study Setting Health centers from five districts in Tehran, Iran. Methods 270 adults with an age range of 18 years and older participated. CRF was assessed...
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Background: Uncertainty remains about the estimates of the effects for resveratrol supplementation, including the certainty of the evidence for each estimate and the magnitude of the observed impact based on the minimal important difference. Objective: We aimed to provide an overview of the effects of resveratrol supplementation, in comparison to c...
Article
Existing evidence has uncovered the potential health benefits of cinnamon intake; however, its effect on liver function is unclear. Thus, the aim of this systematic review and meta-analysis was to examine the effect of cinnamon supplementation on liver enzymes. Relevant articles were identified through a systematic search in PubMed/Medline, Scopus,...
Article
We performed this systematic review and meta-analysis to evaluate observational studies assessing the association between ultra-processed food (UPF) consumption and the risk of overweight, obesity, and abdominal obesity in the general population. We searched the databases PubMed/MEDLINE, Scopus, Embase, and ISI Web of Science from inception until D...
Article
We aimed to perform an umbrella review of systematic reviews and meta-analyses (SRMAs) of observational studies of the association of the dietary inflammatory index (DII) with the risk of non-communicable chronic disease and mortality in the general population. We searched PubMed, Scopus, and ISI Web of Science to November 2020. For each outcome, t...
Article
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Objective: We aimed to assess the association of the oxidative balance score (OBS) with metabolic syndrome (MetS) in adults. Design: A population-based cross-sectional study Setting. Health centers from five districts in Tehran, Iran. Methods: We recruited 847 participants with an age range of 18-65 years. Dietary intake was assessed by a semi...
Article
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Objective The aim of this study was to investigate the linear and nonlinear dose-response associations of animal-based dietary protein intake and risk of developing rheumatoid arthritis (RA). Methods A systematic search of MEDLINE, Scopus and Embase was conducted up to October 2020. Observational studies that report risk estimates of RA for animal...
Preprint
Objective: Traditional pairwise meta-analyses indicated that nuts consumption can improve blood pressure. We aimed to determine the dose-dependent effect of nuts on systolic (SBP) and diastolic blood pressure (DBP) in adults. Methods: A systematic search was undertaken in PubMed, Scopus, and ISI Web of Science till March 2021. Randomized controlled...
Article
Purpose This paper aims to evaluate the association between carbohydrate quality index (CQI) and nutrient adequacy in Iranian adults. Design/methodology/approach A total of 268 men and women with ages ranged from 18 to 70 years were evaluated in a cross-sectional study. The CQI was calculated by adding together the three components, namely, the ra...
Article
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We aimed to examine the association between adherence to plant-based diets (PBDs) and the risk of mortality among the general population. Relevant investigations were identified through PubMed, Scopus, Embase, and ISI Web of Knowledge. Data were pooled using a random-effects or a fixed-effects model. Twelve prospective cohort studies with 42,697 de...
Article
Aims To evaluate the long-term consequences of coffee drinking in patients with type 2 diabetes. Data synthesis PubMed, Scopus, and Web of Sciences were searched to November 2020 for prospective cohort studies evaluating the association of coffee drinking with risk of cardiovascular disease (CVD) and mortality in patients with type 2 diabetes. Two...
Article
Objective Our objective was to evaluate the association between the dietary phytochemical index (DPI), reflecting the phytochemical content of the diet, and general and central obesity in Iranian adults. Methods We studied 844 adults (264 men and 580 women) with a mean age of 44.7 ± 10.8 years in a population-based cross-sectional study in Tehran,...
Article
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In this study, we assessed the association between the dietary phytochemical index (DPI) and metabolic syndrome (MetS) among adults in a cross-sectional study. We enrolled 850 adult men and women aged 18-65 years who had been referred to health centers in Tehran, Iran. The DPI was calculated based on 8 components including fruits, vegetables, legum...
Article
Several pharmaceutical and non-pharmaceutical approaches have been suggested to improve liver health. There is a large discrepancy in the effects of saffron supplementation on liver function in adults. To fill this knowledge gap, this systematic review and meta-analysis of randomized controlled trials (RCTs) assess the effects of saffron supplement...
Article
There is an increased interest in the potential health benefits of nutraceutical therapies, such as Anethum graveolens (dill). Therefore, this systematic review and meta-analysis aimed to evaluate the effects of Anethum graveolens supplementation on lipid profiles and glycemic indices in adults. A systematic search was performed for literature publ...
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The present study aimed to investigate the reduction of aflatoxins as a potent hazard for human health in nuts during roasting, irradiation, and fumigation processes. A systematic search was performed in PubMed, Scopus, and ISI Web of Science on 6 April 2020 to find interventional studies assessing the effects of roasting, fumigation, and irradiati...
Article
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Although obesity has been associated with an increased cancer risk in the general population, the association in patients with type 2 diabetes (T2D) remains controversial. We conducted a dose-response meta-analysis of cohort studies of body mass index (BMI) and the risk of total and site-specific cancers in patients with T2D. A systematic literatur...
Article
We aimed to investigate the association between adherence to the Nordic diet (ND) and the risk of chronic disease. PubMed, Scopus, and ISI Web of Science were searched to February 2020 to find prospective cohort studies. The relative risks (RRs) were calculated using a fixed-effects/random-effects model. The certainty of evidence was rated using th...
Article
We aimed to present a comprehensive review of the association of dietary glycemic index (GI) and load (GL) with the risk of chronic disease. Published meta-analyses of prospective observational studies evaluating the association of dietary GI and GL with risk of chronic disease were identified by a search in PubMed and Scopus to November, 2020. Sum...
Article
Background & objectives: Previous findings assessing the association between long-term protein intake and cardiovascular diseases (CVDs) are inconsistent. This study aimed to summarize previous investigations on the association between total, animal and plant proteins intake and the risk of coronary heart disease (CHD) and hypertension (HTN) in adu...
Article
The present cross-sectional study aimed to assess the association of daily irregularity in energy intake and diet quality among apparently healthy adults in Iran. The research was conducted on 850 adult men and women (age range: 20-59 years) who attended the health care centers in Tehran. Dietary intake was assessed by three, 24-h dietary recalls....
Article
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Objective To quantify the association of indices of central obesity, including waist circumference, hip circumference, thigh circumference, waist-to-hip ratio, waist-to-height ratio, waist-to-thigh ratio, body adiposity index, and A body shape index, with the risk of all cause mortality in the general population, and to clarify the shape of the dos...
Article
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We aimed to investigate the association of dietary fiber consumption with mortality risk in women with breast cancer. A systematic search was undertaken in PubMed, Scopus, and ISI Web of Science till March 2020 to find cohort studies investigating the association of dietary fiber consumption with mortality risk in women with breast cancer. A random...
Article
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We aimed to fully review the association of empirical dietary patterns with the risk of non-communicable chronic diseases and to rate the quality of the evidence. Published meta-analyses of observational studies investigating the association of empirically derived dietary patterns with the risk of chronic diseases were identified by searching PubMe...
Article
We aimed to investigate the association of fish consumption with the risk of coronary heart disease (CHD), stroke and all-cause mortality in patients with type 2 diabetes (T2D). We systematically searched PubMed and Scopus from inception till June 2019. We included prospective cohort studies assessing the relation of fish intake with the risk of CH...
Article
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Background: Although previous investigations have proposed an association between Dietary Approaches to Stop Hypertension (DASH)-style diet and lower mortality from chronic diseases, the exposure-response relationship is not clear. The present systematic review and meta-analysis aimed to explore the linear and non-linear dose-response association...
Article
We aimed to examine the association of weight gain during adulthood with the risk of cardiovascular disease (CVD) in the general population. We performed a systematic search of PubMed and Scopus, from inception to June 2019. Prospective cohort studies investigating the association of weight gain during adulthood with the risk of CVD were included....
Article
Epidemiological studies show that adherence to healthy dietary patterns may be associated with a lower risk of decline in kidney function. However, existing evidence has not been quantitatively gathered. Pertinent observational studies investigating the association of adherence to a healthy dietary pattern, either priori-defined dietary pattern/ind...
Article
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We aimed to present a comprehensive review of published meta-analyses of prospective cohort studies on the association of fish consumption and the risk of chronic disease. A systematic search was undertaken in PubMed and Scopus to October 2019 to find meta-analyses of observational studies evaluating the association of fish consumption and the risk...
Article
The aim of this study was to determine the effect of zinc supplementation on anthropometric measures. In this systematic review and dose–response meta-analysis, we searched PubMed, Scopus, ISI Web of Science, and the Cochrane Library from database inception to August 2018 for relevant randomized controlled trials. Mean differences and SDs for each...
Article
Summary Background and aims The association between dietary habits and kidney function in patients with type 2 diabetes (T2D) has been poorly investigated. We aimed to test the relationship between adherences to the Dietary Approaches to Stop Hypertension (DASH) diet and the Mediterranean dietary pattern (Med diet) and likelihood of diabetic nephro...
Article
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A previous meta-analysis provided convincing evidence for an inverse association between adherence to a Mediterranean diet (MedDiet) and the risk of all-cause mortality. Since then, 19 prospective studies have published new findings. We updated the evidence from prospective studies and conducted a dose-response meta-analysis to test the linear and...
Article
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Objective: To systematically assess the association of circulating inflammation markers with the future risk of hypertension. Methods: We did a systematic literature search of PubMed and Scopus, from database inception to July 10, 2018. Prospective and retrospective cohort studies evaluating the association of circulating C-reactive protein (CRP),...
Article
Objective: The objective of this study was to quantify the association of dietary intake and circulating concentration of major dietary antioxidants with risk of total cardiovascular disease (CVD) mortality. Design: Systematic review and meta-analysis. Setting: Systematic search in PubMed and Scopus, up to October 2017. Subjects: Prospective observ...
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Abstract Limited evidence suggests that the association between fish consumption and risk of cardiovascular disease may be confounded by some regional-related factors. We aimed to quantify the association of fish consumption with risk of myocardial infarction (MI), and to clarify the shape of the dose-response relation in Western and Asian countrie...
Article
The objective of this study was to quantify the association of B-vitamins intake with the future risk of coronary heart disease (CHD). A systematic search was performed with the use of PubMed and Scopus from inception to April 30, 2018. Prospective cohort studies evaluating the association of intake of folate, vitamin B6, and vitamin B12 with risk...
Article
Existing evidence suggests a link between the inflammatory potential of diet and risk of cancer. This study aimed to test the linear and potential nonlinear dose-response associations of the Dietary Inflammatory Index (DII), as being representative of inflammatory features of the diet, and site-specific cancer risk. A systematic search was conducte...
Article
The association of calcium intake with risk of developing hypertension in the general population has not been established yet. We systematically searched PubMed and Scopus databases to February 2018 to find prospective observational studies investigating the association of calcium intake with risk of developing hypertension. The reported risk estim...