The journey of MASLD: Tracking resolution, relapse, and predictive factors after sleeve gastrectomy and one-anastomosis gastric bypass, a propensity score-matched cohort study.

Aims: To assess the rates and predictors of resolution and relapse of metabolic-dysfunction associated steatotic liver disease (MASLD) in individuals undergoing sleeve gastrectomy (SG) or one-anastomosis gastric bypass (OAGB).

Methods: This observational prospective cohort study involved 1618 propensity score-matched participants (81.5% female) with concurrent MASLD and obesity who underwent SG or OAGB between 2013 and 2023.

Sex specific reference values for body fat among healthy adults: Tehran lipid and glucose study.

Background: Assessing body fat levels in particular groups is crucial, because excess body fat plays a significant role in various metabolic disorders. The purpose of the present study is to recognize optimal sex-specific reference values of percent body fat (PBF) in a healthy Iranian population using a statistical approach to normality.

Methods: In this cross-sectional study, among the 7986 participants who had bioelectrical impedance analyzer (BIA) data, after considering the exclusion criteria, 212 healthy individuals with the age of 20-30 years old (89 men and 123 women), with the lowest PBF values, were selected from Tehran Lipid and Glucose Study (TLGS).

Safety and efficacy of sleeve gastrectomy in non-diabetic individuals with class I vs. class II obesity: a matched controlled experiment from Tehran Obesity Treatment Study (TOTS).

Background: This study aimed to evaluate the 3-year outcomes of sleeve gastrectomy in non-diabetic individuals with class I obesity.

Methods: A total of 78 participants with class I obesity and 78 participants with class II obesity, matched in terms of age, sex (93.6% female), and the rates of dyslipidemia and hypertension, were included in this prospective cohort study.

Comparative analysis of adolescent hypertension definitions for predicting early adulthood carotid artery intima-media thickness: Tehran lipid and glucose study.

Background: Definitions of childhood and adolescent hypertension (HTN) do not precisely elucidate the relationship between HTN and cardiovascular outcomes. Carotid intima-media thickness (CIMT), as a substitute for cardiovascular outcomes, enables the early identification of cardiovascular events throughout early adulthood.

Purpose: This study aimed to compare the ability of childhood HTN definitions to predict a high CIMT in early adulthood.

Thyroid Hormone Replacement Dosing after Bariatric Surgery in Patients with Primary Hypothyroidism And Severe Obesity: Tehran Obesity Treatment Study.

Obesity and hypothyroidism are common medical conditions that are associated with each other. Bariatric surgery (BS) is a common approach used to achieve substantial weight loss in obese patients. However, there is limited evidence regarding the need for postsurgery levothyroxine (LT4) dose adjustment in patients with hypothyroidism undergoing BS.

Major dietary patterns and their associations with total weight loss and weight loss composition 2-4 years after sleeve gastrectomy.

Background: Food intakes 1-2 years following bariatric surgery depend more on patients than the surgery's gastrointestinal tract changes. This study aimed to determine the major dietary patterns of patients after the first two years of sleeve gastrectomy and to investigate their associations with total weight loss (TWL) and the proportion of TWL as fat mass (FM) and fat-free mass (FFM) loss.

Methods: This cross-sectional study included 146 patients undergoing sleeve gastrectomy 2-4 years after surgery.

Development and validation of a healthy diet and physical activity tool based on health action process approach among patients undergone bariatric surgery.

Background: The purpose of this study was to develop and evaluate the validity and reliability of a healthy diet and physical activity assessment tool among patients one year after bariatric surgery based on Health Action Process Approach.

Methods: We compiled 53 items based on healthy diet and physical activity behaviors among patients undergone bariatric surgery through reviewing the literature. Using quantitative and qualitative methods, and a panel of experts, we evaluated the face and content validities of the tool.

Eating behaviors and dietary intake 2 to 4 years following sleeve gastrectomy: Are there any associations?

Objectives: A lack of research exists on associations between eating behaviors and dietary intake among patients undergoing bariatric surgery. This study aimed to ascertain the association between eating behaviors and dietary quantity and quality at mid-term postsleeve gastrectomy (SG).

Methods: This cross-sectional study included 146 adults within 2 to 4 years post-SG.

What About My Weight? Insufficient Weight Loss or Weight Regain After Bariatric Metabolic Surgery.

Context: This review study aimed to investigate the definition, etiology, risk factors (RFs), management strategy, and prevention of insufficient weight loss (IWL) and weight regain (WR) following bariatric metabolic surgery (BMS).

Evidence Acquisition: Electronic databases were searched to retrieve relevant articles. The inclusion criteria were English articles with adult participants assessing the definition, prevalence, etiology, RFs, management strategy, and prevention of IWL/WR.

The effect of obesity phenotype changes on cardiovascular outcomes in adults older than 40 years in the prospective cohort of the Tehran lipids and glucose study (TLGS): joint model of longitudinal and time-to-event data.

Background: Obesity is a worldwide health concern with serious clinical effects, including myocardial infarction (MI), stroke, cardiovascular diseases (CVDs), and all-cause mortality. The present study aimed to assess the association of obesity phenotypes and different CVDs and mortality in males and females by simultaneously considering the longitudinal and survival time data.

Methods: In the Tehran Lipid and Glucose Study (TLGS), participants older than three years were selected by a multi-stage random cluster sampling method and followed for about 19 years.

Association of postoperative dietary macronutrient content and quality with total weight loss and fat-free mass loss at midterm after sleeve gastrectomy.

Objectives: This study aimed to investigate the associations of macronutrient quantities and qualities with percentage total weight loss and percentage of fat-free mass loss relative to total weight loss in adults undergoing sleeve gastrectomy.

Methods: This cross-sectional study included 146 patients on postoperative time since sleeve gastrectomy of 2 to 4 y. Diet was assessed using a food frequency questionnaire.

Prevalence and predictors of weight recurrence following bariatric surgery: A longitudinal prospective cohort study from Tehran Obesity Treatment Study (TOTS).

Background: Considering the lack of a standardized definition for weight recurrence (WR), the prevalence and predictors of WR remain inconsistent.

Methods: The prospective study was conducted on 1939 individuals who underwent bariatric surgery;66.8% underwent sleeve gastrectomy (SG), 33.

Comprehensive evaluation of body composition in a wide age range of Iranian adults using bioelectrical impedance analysis: Tehran Lipid and Glucose Study.

Objective: To evaluate sex- and age-stratified body composition (BC) parameters in subjects with wide age range of 20-79 years.

Design: Cross-sectional.

Setting: Participants of Tehran Lipid and Glucose Study (TLGS).

Association between BMI trajectories from childhood to early adulthood and the carotid intima-media thickness in early adulthood: Tehran lipid and glucose study.

Background And Aims: Childhood and adolescence overweight/obesity is an important predictor of obesity and increased long-term cardiometabolic abnormalities in adulthood. In this study, we aimed to investigate the association of body mass index (BMI) and waist circumference (WC) trajectories among children and adolescents with adulthood carotid intima-media thickness (cIMT) as a determinant of subclinical atherosclerosis.

Methods: In this prospective cohort study, 1265 participants aged 3 to 18 were followed up for 18 years.

Covariates of a healthy diet and physical activity self-management one year after Bariatric surgery: A cross-sectional study.

Background: Healthy diet and physical activity self-management is important in maintaining weight loss and preventing weight regain after bariatric surgery. We aimed at evaluating covariates of healthy diet and physical activity self-management among patients undergone bariatric surgery using Health Action Process Approach (HAPA) model.

Method: In this cross-sectional study, 272 patients with a history of bariatric surgery were selected from the data registry of Tehran Obesity Treatment Study (TOTS).

A Comparative Analysis of Safety and Efficacy of Bariatric Surgery During the COVID-19 Pandemic and Pre-Pandemic Period: Insights from the Tehran Obesity Treatment Study.

Background: The COVID-19 pandemic has raised global health concerns and posed challenges for postoperative follow-up care for patients undergoing bariatric surgery due to social distancing rules.

Methods: This was a cohort study on patients with morbid obesity who underwent bariatric surgery and had been enrolled in Tehran Obesity Treatment Study. Patients who had surgery between March 2020 and March 2021 were classified as those undergoing the procedure amid the COVID-19 pandemic, while those who had surgery between March 2017 and March 2018 were categorized as the pre-pandemic group.

Revisional Bariatric Surgery due to Complications: Indications and Outcomes.

Background: The increasing prevalence of bariatric procedures has led to a surge in revisional surgeries. Failure of bariatric surgery can be attributed to inadequate weight loss or complications necessitating revisional surgery. In this study, we investigated the indications and outcomes of revisional surgery due to complications following primary bariatric surgery.

A Bibliometric Study of Scientific Literature on Obesity Research in Web of Science Database (2008-2020): Evidence from the MENA Region.

Background: Obesity has increasingly become a health threat in the Middle East and North Africa (MENA) countries. This study aimed to investigate the scientific publications on obesity in the MENA countries during 2008-2020.

Methods: A longitudinal analysis of 13 years (2008-2020) of bibliographic data from obesity-related articles was performed.

BMI category-specific waist circumference thresholds based on cardiovascular disease outcomes and all-cause mortality: Tehran lipid and glucose study (TLGS).

Background: Waist circumference (WC), a representative of abdominal visceral fat, is strongly associated with cardiovascular disease (CVD) and its outcomes. We aimed to define body mass index (BMI)-specific WC thresholds as predictors of CVD and all-cause mortality.

Methods: In this prospective cohort study in the context of the Tehran Lipid and Glucose Study (TLGS), a total of 3344 men and 4068 women were followed up for 18 years.

Development and evaluation of a customized checklist to assess the quality control of disease registry systems of Tehran, the capital of Iran in 2021.

Background: Clinical registries facilitate medical research by providing 'real data'. In the past decade, an increasing number of disease registry systems (DRS) have been initiated in Iran. Here, we assessed the quality control (QC) of the data recorded in the DRS established by Shahid Beheshti University of Medical Sciences in Tehran, the capital city of Iran, in 2021.

Polyaniline-co-polyindole functionalized magnetic porous carbon derived from MIL-53(Fe) for separation/enrichment of nitrophenols pollutants before determination with high-performance liquid chromatography-ultraviolet detection.

Herein, a novel polyaniline-co-polyindole functionalized magnetic porous carbon derived from MIL-53(Fe) was prepared and employed as an excellent nano-adsorbent to preconcentrate trace amounts of nitro-phenols in water and wastewater samples. Briefly, magnetic MIL-53(Fe) was synthesized by the addition of magnetite nanoparticles, terephthalic acid, and FeCl to the reaction medium. The magnetic MIL-53(Fe) was pyrolyzed under nitrogen protection to obtain a magnetic porous carbon nanocomposite, and finally, the nanomaterial was functionalized with polyaniline-co-polyindole via oxidation polymerization.