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Abdullah SR, Wan Mohd Zin RM, Azizul NH, Sulaiman NS, Khalid NM, Mohd Salim Mullahi Jahn RJ, Khalil MKN, Abu Seman N, Zainal Abidin NA, Ali A, Tan YZ, Omar A, Seman Z, Yahya A, Md Noh MF. The Effect of a Combined Intermittent Fasting Healthy Plate Intervention on Anthropometric Outcomes and Body Composition Among Adults With Overweight and Obesity: Nonrandomized Controlled Trial. JMIR Form Res 2024; 8:e51542. [PMID: 38598283 PMCID: PMC11043932 DOI: 10.2196/51542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 04/11/2024] Open
Abstract
BACKGROUND Adult obesity and overweight pose a substantial risk to global public health and are associated with various noncommunicable diseases. Although intermittent fasting (IF) is increasingly used as a relatively new dietary strategy for weight loss, the effectiveness of 2 days per week of dry fasting remains unknown. OBJECTIVE This study aims to evaluate the effectiveness of a combined dry IF and healthy plate (IFHP) and healthy plate (HP) intervention in improving anthropometric outcomes and body composition. METHODS This nonrandomized controlled trial involved 177 adults who were overweight and obese. Among them, 91 (51.4%) were allocated to the IFHP group and 86 (48.6%) were allocated to the HP group. The overall study duration was 6 months (October 2020 to March 2021). The intervention was divided into 2 phases: supervised (3 months) and unsupervised (3 months). The data were collected at baseline, after the supervised phase (month 3), and after the unsupervised phase (month 6). Anthropometric (weight, height, waist circumference, and hip circumference) and body composition (body fat percentage, body fat mass, skeletal muscle mass, and visceral fat area) data were measured at all 3 data collection points. Sociodemographic data were obtained using a questionnaire at baseline. RESULTS Most participants were female (147/177, 83.1%) and Malay (141/177, 79.7%). After 3 months, there were significant reductions in weight (difference -1.68; P<.001), BMI (difference -0.62; P<.001), body fat percentage (difference -0.921; P<.001), body fat mass (difference -1.28; P<.001), and visceral fat area (difference -4.227; P=.008) in the IFHP group, whereas no significant changes were observed in the HP group. Compared to baseline, participants in the IFHP group showed a significant decrease in weight (difference -1.428; P=.003), BMI (difference -0.522; P=.005), body fat percentage (difference -1.591; P<.001), body fat mass (difference -1.501; P<.001), visceral fat area (difference -7.130; P<.001), waist circumference (difference -2.304; P=.001), and hip circumference (difference -1.908; P=.002) at month 6. During the unsupervised phase, waist (IFHP difference -3.206; P<.001, HP difference -2.675; P=.004) and hip (IFHP difference -2.443; P<.001; HP difference -2.896; P<.001) circumferences were significantly reduced in both groups (P<.01), whereas skeletal muscle mass (difference 0.208; P=.04) and visceral fat area (difference -2.903; P=.003) were significantly improved in the IFHP group only. No significant difference in the between-group comparison was detected throughout the intervention (all P>.05). CONCLUSIONS A combined IFHP intervention was effective in improving anthropometric outcomes and body composition in adults with overweight and obesity. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) RR2-10.2196/33801.
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Affiliation(s)
- Shazana Rifham Abdullah
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Ruziana Mona Wan Mohd Zin
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Nur Hayati Azizul
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Nur Suffia Sulaiman
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Norhayati Mustafa Khalid
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Roshan Jahn Mohd Salim Mullahi Jahn
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Muhamad Khairul Nazrin Khalil
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Norhashimah Abu Seman
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Nur Azlin Zainal Abidin
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Azizan Ali
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - You Zhuan Tan
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Azahadi Omar
- Sector for Biostatistic and Data Repository, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Zamtira Seman
- Sector for Biostatistic and Data Repository, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
| | - Abqariyah Yahya
- Department of Social and Preventive Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Mohd Fairulnizal Md Noh
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health, Shah Alam, Malaysia
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Bradley M, Melchor J, Carr R, Karjoo S. Obesity and malnutrition in children and adults: A clinical review. OBESITY PILLARS (ONLINE) 2023; 8:100087. [PMID: 38125660 PMCID: PMC10728708 DOI: 10.1016/j.obpill.2023.100087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/05/2023] [Accepted: 09/05/2023] [Indexed: 12/23/2023]
Abstract
Background In the U.S., children and adults are consuming more low-nutrient foods with added sugar and excess fats as compared to healthy, high-quality calories and micronutrients. This diet is increasing the prevalence of malnutrition and nutritional deficiencies, despite high calorie intake. This is a review of the common micronutrient deficiencies, the risk factors for malnutrition, dietary plans, and the health consequences in children and adults with obesity in the U.S. Methods This clinical review of literature was performed on the MEDLINE (PubMed) search engine. A total of 1391 articles were identified and after review, a total of 130 were found to be most pertinent. Discussion The most common micronutrient deficiencies found in patients with obesity were vitamin A, thiamine (B1), folate (B9), cobalamin (B12), vitamin D, iron, calcium, and magnesium, especially prior and after bariatric surgery. Diets that produced the most weight reduction also further puts these individuals at risk for worsening malnutrition. Malnutrition and micronutrient deficiencies can worsen health outcomes if not properly managed. Conclusion Adequate screening and awareness of malnutrition can improve the health outcomes in patients with obesity. Physiologic changes in response to increased adiposity and inadequate intake increase this population's risk of adverse health effects. Malnutrition affects the individual and contributes to worse public health outcomes. The recommendations for screening for malnutrition are not exclusive to individuals undergoing bariatric procedures and can improve the health outcomes of any patient with obesity. However, clearly, improved nutritional status can assist with metabolism and prevent adverse nutritional outcomes post-bariatric surgery. Clinicians should advise on proper nutrition and be aware of diets that worsen deficiencies.
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Affiliation(s)
- Morgan Bradley
- Florida State University College of Medicine, 1115 W Call St, Tallahassee, FL, 32304, USA
| | - Julian Melchor
- Florida State University College of Medicine, 1115 W Call St, Tallahassee, FL, 32304, USA
| | - Rachel Carr
- Florida State University College of Medicine, 1115 W Call St, Tallahassee, FL, 32304, USA
| | - Sara Karjoo
- Florida State University College of Medicine, 1115 W Call St, Tallahassee, FL, 32304, USA
- Johns Hopkins All Children's Hospital, 601 5th St. S. Suite 605, St. Petersburg, FL, 33701, USA
- University of South Florida Morsani College of Medicine, 560 Channelside Drive MDD 54, Tampa, FL, 33602, USA
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Abstract
Importance Obesity affects approximately 42% of US adults and is associated with increased rates of type 2 diabetes, hypertension, cardiovascular disease, sleep disorders, osteoarthritis, and premature death. Observations A body mass index (BMI) of 25 or greater is commonly used to define overweight, and a BMI of 30 or greater to define obesity, with lower thresholds for Asian populations (BMI ≥25-27.5), although use of BMI alone is not recommended to determine individual risk. Individuals with obesity have higher rates of incident cardiovascular disease. In men with a BMI of 30 to 39, cardiovascular event rates are 20.21 per 1000 person-years compared with 13.72 per 1000 person-years in men with a normal BMI. In women with a BMI of 30 to 39.9, cardiovascular event rates are 9.97 per 1000 person-years compared with 6.37 per 1000 person-years in women with a normal BMI. Among people with obesity, 5% to 10% weight loss improves systolic blood pressure by about 3 mm Hg for those with hypertension, and may decrease hemoglobin A1c by 0.6% to 1% for those with type 2 diabetes. Evidence-based obesity treatment includes interventions addressing 5 major categories: behavioral interventions, nutrition, physical activity, pharmacotherapy, and metabolic/bariatric procedures. Comprehensive obesity care plans combine appropriate interventions for individual patients. Multicomponent behavioral interventions, ideally consisting of at least 14 sessions in 6 months to promote lifestyle changes, including components such as weight self-monitoring, dietary and physical activity counseling, and problem solving, often produce 5% to 10% weight loss, although weight regain occurs in 25% or more of participants at 2-year follow-up. Effective nutritional approaches focus on reducing total caloric intake and dietary strategies based on patient preferences. Physical activity without calorie reduction typically causes less weight loss (2-3 kg) but is important for weight-loss maintenance. Commonly prescribed medications such as antidepressants (eg, mirtazapine, amitriptyline) and antihyperglycemics such as glyburide or insulin cause weight gain, and clinicians should review and consider alternatives. Antiobesity medications are recommended for nonpregnant patients with obesity or overweight and weight-related comorbidities in conjunction with lifestyle modifications. Six medications are currently approved by the US Food and Drug Administration for long-term use: glucagon-like peptide receptor 1 (GLP-1) agonists (semaglutide and liraglutide only), tirzepatide (a glucose-dependent insulinotropic polypeptide/GLP-1 agonist), phentermine-topiramate, naltrexone-bupropion, and orlistat. Of these, tirzepatide has the greatest effect, with mean weight loss of 21% at 72 weeks. Endoscopic procedures (ie, intragastric balloon and endoscopic sleeve gastroplasty) can attain 10% to 13% weight loss at 6 months. Weight loss from metabolic and bariatric surgeries (ie, laparoscopic sleeve gastrectomy and Roux-en-Y gastric bypass) ranges from 25% to 30% at 12 months. Maintaining long-term weight loss is difficult, and clinical guidelines support the use of long-term antiobesity medications when weight maintenance is inadequate with lifestyle interventions alone. Conclusion and Relevance Obesity affects approximately 42% of adults in the US. Behavioral interventions can attain approximately 5% to 10% weight loss, GLP-1 agonists and glucose-dependent insulinotropic polypeptide/GLP-1 receptor agonists can attain approximately 8% to 21% weight loss, and bariatric surgery can attain approximately 25% to 30% weight loss. Comprehensive, evidence-based obesity treatment combines behavioral interventions, nutrition, physical activity, pharmacotherapy, and metabolic/bariatric procedures as appropriate for individual patients.
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Affiliation(s)
- Arielle Elmaleh-Sachs
- Department of Medicine, Division of General Internal Medicine and Clinical Innovation, New York University Grossman School of Medicine, New York, New York
- Department of Population Health, New York University Grossman School of Medicine, New York, New York
- Family Health Centers at NYU Langone, New York, New York
| | - Jessica L Schwartz
- Division of General Internal Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Carolyn T Bramante
- Division of General Internal Medicine, University of Minnesota Medical School, Minneapolis
| | - Jacinda M Nicklas
- Division of General Internal Medicine, University of Colorado School of Medicine, Aurora
| | - Kimberly A Gudzune
- Division of General Internal Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Melanie Jay
- Department of Medicine, Division of General Internal Medicine and Clinical Innovation, New York University Grossman School of Medicine, New York, New York
- Department of Population Health, New York University Grossman School of Medicine, New York, New York
- New York Harbor Veteran Affairs, New York, New York
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Maneesing TU, Dawangpa A, Chaivanit P, Songsakul S, Prasertsri P, Yumi Noronha N, Watanabe LM, Nonino CB, Pratumvinit B, Sae-Lee C. Optimising blood glucose control with portioned meal box in type 2 diabetes mellitus patients: a randomised control trial. Front Nutr 2023; 10:1216753. [PMID: 37533574 PMCID: PMC10390788 DOI: 10.3389/fnut.2023.1216753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 07/04/2023] [Indexed: 08/04/2023] Open
Abstract
Background The impact of dietary factors on glycaemic control in type 2 diabetes mellitus (T2DM) is well established. However, the effectiveness of transforming portion control into a practical innovation for glycaemic control in T2DM has not yet been established for counselling in nutrition. The aim of this study was to compare the effect of general counselling in nutrition (GCN) and a portioned meal box (PMB) on fasting blood glucose, glycated haemoglobin (HbA1c) and body composition. Methods A randomised, parallel intervention trial was conducted over 12 weeks, with GCN: carbohydrate portion control concept by using food exchange lists (n = 25) and PMB: portioned meal box was set by energy requirements (n = 25). Results Both GCN and PMB demonstrated reductions in HbA1c levels at the 6th and 12th weeks compared to baseline. However, no significant difference in HbA1c was observed between GCN and PMB at either the 6th or 12th week. Using PMB at least four times a week significantly decreased HbA1c during the intervention period (p = 0.021 and p < 0.001 for weeks 6 and 12 when compared with baseline, respectively). Changes in body composition were observed: body weight decrease in PMB only, body fat decrease and constant muscle mass in both groups. Both methods tended to relieve hunger and increased satiety in both groups. The satisfaction evaluation showed that participants preferred to use PMB over GCN (p = 0.001). Additionally, participants consumed less energy, carbohydrate and fat in PMB (p = 0.001, p = 0.019, and p = 0.001, respectively) and less energy and fat in GCN (p = 0.006 and p = 0.001, respectively). Conclusion A better diet, either through GCN or PMB, can play an important role in improving dietary intake compliance and controlling blood glucose.
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Affiliation(s)
- Tanu-udom Maneesing
- Faculty of Allied Health Sciences, Burapha University, Chonburi, Thailand
- Exercise and Nutrition Innovation and Sciences Research Unit, Burapha University, Chonburi, Thailand
| | - Atchara Dawangpa
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Research Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pechngam Chaivanit
- Department of Internal Medicine, Faculty of Medicine, Burapha University, Chonburi, Thailand
| | - Sudjai Songsakul
- Department of Internal Medicine, Faculty of Medicine, Burapha University, Chonburi, Thailand
| | - Piyapong Prasertsri
- Faculty of Allied Health Sciences, Burapha University, Chonburi, Thailand
- Exercise and Nutrition Innovation and Sciences Research Unit, Burapha University, Chonburi, Thailand
| | | | - Lígia Moriguchi Watanabe
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Carla Barbosa Nonino
- Department of Health Sciences, Ribeirão Preto Medical School, São Paulo, Brazil
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Busadee Pratumvinit
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanachai Sae-Lee
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Research Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Jia SS, Liu Q, Allman-Farinelli M, Partridge SR, Pratten A, Yates L, Stevens M, McGill B. The Use of Portion Control Plates to Promote Healthy Eating and Diet-Related Outcomes: A Scoping Review. Nutrients 2022; 14:nu14040892. [PMID: 35215542 PMCID: PMC8874720 DOI: 10.3390/nu14040892] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/16/2022] [Accepted: 02/18/2022] [Indexed: 01/17/2023] Open
Abstract
The role of portion control plates in achieving healthy diets is unclear. The aim of this scoping review was to systematically map findings from peer reviewed and grey literature to provide evidence for the use of portion control plates to promote healthy eating and nutrition-related knowledge in children and adults. A secondary aim was to review the design characteristics of portion control plates. The search was conducted in four databases, including Medline, CINAHL, Embase, and PsycInfo, and grey literature sources following the PRISMA scoping review guidelines. A total of 22 articles comprising 23 intervention studies and 8 from grey literature were included. It was found that the various two-dimensional and three-dimensional portion control plates examined were effective tools for better portion size selection in healthy children and adults. Most portion control plates dedicated half the plate to vegetables, a quarter to protein, and a quarter to carbohydrates. The use of portion control plates in nutrition interventions appears to promote weight loss among those with overweight and obesity and/or type 2 diabetes. However, portion control plates were mostly used as part of multicomponent interventions and the effectiveness of the portion control plate as a stand-alone educational resource or portion control tool alone was uncertain. Further interventional research is indicated to investigate portion plates as tools to improve dietary behaviours and food consumption at the population level.
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Affiliation(s)
- Si Si Jia
- Engagement and Co-Design Research Hub, School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney 2006, Australia;
- Correspondence: ; Tel.: +61-2-8627-1697
| | - Qingzhou Liu
- Charles Perkins Centre, School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney 2006, Australia;
| | - Margaret Allman-Farinelli
- Charles Perkins Centre, Sydney Nursing School, Faculty of Medicine and Health, The University of Sydney, Sydney 2006, Australia;
| | - Stephanie R. Partridge
- Engagement and Co-Design Research Hub, School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney 2006, Australia;
- Charles Perkins Centre, Sydney Nursing School, Faculty of Medicine and Health, The University of Sydney, Sydney 2006, Australia;
- Prevention Research Collaboration, Sydney School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney 2006, Australia;
| | - Amy Pratten
- New South Wales Ministry of Health, Centre for Population Health, St Leonards, Sydney 2065, Australia; (A.P.); (L.Y.); (M.S.)
| | - Lisa Yates
- New South Wales Ministry of Health, Centre for Population Health, St Leonards, Sydney 2065, Australia; (A.P.); (L.Y.); (M.S.)
| | - Matthew Stevens
- New South Wales Ministry of Health, Centre for Population Health, St Leonards, Sydney 2065, Australia; (A.P.); (L.Y.); (M.S.)
| | - Bronwyn McGill
- Prevention Research Collaboration, Sydney School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney 2006, Australia;
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Jayawardena R, Sooriyaarachchi P, Misra A. Abdominal obesity and metabolic syndrome in South Asians: prevention and management. Expert Rev Endocrinol Metab 2021; 16:339-349. [PMID: 34586004 DOI: 10.1080/17446651.2021.1982381] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 09/15/2021] [Indexed: 12/12/2022]
Abstract
INTRODUCTION The prevalence of metabolic syndrome (MetS) and abdominal obesity are escalating in South Asian countries. It is well established that MetS is associated with increased risk for both Type 2 diabetes mellitus and cardiovascular diseases. South Asians have an increased risk of MetS due to a variety of factors including unhealthy lifestyle and their unique body composition. AREAS COVERED In this review, we discuss the prevalence, associated risk factors, and evidence-based preventive and curative strategies for MetS and abdominal obesity in South Asians. A literature search through PubMed®, Web of Science®, and Scopus® was performed for studies published before 31st April 2021. A combination of the following keywords was used with the names of the individual South Asian countries: 'metabolic syndrome,' 'syndrome X,' 'abdominal obesity,' 'central obesity,' 'visceral obesity,' 'prevention,' and 'management.' EXPERT OPINION According to current evidence, MetS and abdominal obesity are highly prevalent among South Asians. Several risk factors, such as lifestyle, socio-demography, cultural, and body composition, are associated with MetS. Limited research shows culturally tailored lifestyle interventions are effective in preventing and managing MetS and abdominal obesity among South Asians.
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Affiliation(s)
- Ranil Jayawardena
- Department of Physiology, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
- School of Exercise & Nutrition Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Piumika Sooriyaarachchi
- School of Exercise & Nutrition Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Anoop Misra
- Fortis-C-DOC Centre of Excellence for Diabetes, Metabolic Diseases and Endocrinology, Chirag Enclave, New Delhi, India
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Twells LK, Harris Walsh K, Blackmore A, Adey T, Donnan J, Peddle J, Ryan D, Farrell A, Nguyen H, Gao Z, Pace D. Nonsurgical weight loss interventions: A systematic review of systematic reviews and meta-analyses. Obes Rev 2021; 22:e13320. [PMID: 34378849 DOI: 10.1111/obr.13320] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 12/17/2022]
Abstract
Access to bariatric surgery to treat obesity is limited and has long wait times. Many adults are seeking nonsurgical weight loss support. Our study objective was to conduct a systematic review of nonsurgical weight loss interventions. PubMed, EMBASE, CINAHL, PsycInfo, and the CochraneLibrary were searched. Inclusion criteria were adults 18 + with a BMI > 25 enrolled in minimum a 3-month nonsurgical weight loss intervention. Studies were independently extracted and assessed for quality using A MeaSurement Tool to Assess systematic Reviews 2 (AMSTAR2). Pooled analyses were extracted, graded for evidence quality, and summarized. A total of 1065 studies were assessed for eligibility; 815 screened and 236 full-texts assessed. Sixty-four meta-analyses met eligibility criteria: 1180 RCTs with 184,605 study participants. Studies were categorized as diets (n = 13), combination therapies (n = 10), alternative (n = 16), technology (n = 10), behavioral (n = 5), physical activity (n = 6), and pharmacotherapy (n = 3). In 80% of studies, significant weight losses were reported ranging from 0.34-8.73 k in favor of the intervention. The most effective nonsurgical weight loss interventions were diets, either low-carbohydrate or low-fat diets, followed for 6 months; combination therapy including meal replacements plus enhanced support; and pharmacotherapy followed for 12 months. Although significant weight losses were reported for other types of interventions such as physical activity and technology, the majority of studies reported weight losses less than 2 kgs.
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Affiliation(s)
- Laurie K Twells
- Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Kristin Harris Walsh
- Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Alicia Blackmore
- Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Tanis Adey
- Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Jennifer Donnan
- School of Pharmacy, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Justin Peddle
- School of Pharmacy, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Devonne Ryan
- Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Alison Farrell
- Health Sciences Library, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Hai Nguyen
- School of Pharmacy, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Zhiwei Gao
- Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Dave Pace
- Faculty of Medicine-Surgery, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
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