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Xin C, Imanifard R, Jarahzadeh M, Rohani P, Velu P, Sohouli MH. Impact of Gluten-free Diet on Anthropometric Indicators in Individuals With and Without Celiac Disease: A Systematic Review and Meta-analysis. Clin Ther 2023; 45:e243-e251. [PMID: 37903705 DOI: 10.1016/j.clinthera.2023.09.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 09/07/2023] [Accepted: 09/19/2023] [Indexed: 11/01/2023]
Abstract
PURPOSE Previous studies have found that a gluten-free diet (GFD) may have improve obesity-related factors. For this reason, we conducted a systematic review and meta-analysis to investigate the effect of a GFD on anthropometric indicators. METHODS We performed a systematic search in databases from inception until July 12, 2022. We included all relevant articles that evaluate efficacy of a GFD on anthropometric indicators in patients with and without celiac disease (CD). Random-effects models were applied to combine the data. The main outcomes were then analyzed using weight mean differences (WMDs) and 95% CIs. FINDINGS A total of 27 articles met the eligible criteria and were included. Pooled results from the random-effects model indicated that the GFD has no significant effect on any of the factors of anthropometry, including weight (WMD, 1.20 kg; 95% CI, -1.16 to 3.55 kg; P = 0.319), body mass index (WMD, 0.70 kg/m2; 95% CI, -0.45 to 1.84 kg/m2; P = 0.233), waist circumference (WMD, 0.92 cm; 95% CI, -1.34 to 3.17 cm; P = 0.497), and body fat (WMD, 1.02%; 95% CI, -0.38% to 2.42%; P = 0.153). The subgroup results indicated that after implementation of a GFD significant increased weight and body fat occurred in patients with compared with without CD. In addition, the effect of this diet on the increase of BMI and body fat in the intervention of more than 48 weeks was significantly higher. IMPLICATIONS The results of the present study indicate that a GFD can have a significant and beneficial effect on weight and body fat in patients with CD.
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Affiliation(s)
- Chenleng Xin
- Hunan Provincial People's Hospital Xingsha Branch, Changsha, 410008, China
| | | | | | - Pejman Rohani
- Pediatric Gastroenterology and Hepatology Research Center, Pediatrics Centre of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Periyannan Velu
- Galileovasan Offshore and Research and Development Pvt Ltd, Nagapattinam, Tamil Nadu, India
| | - Mohammad Hassan Sohouli
- Pediatric Gastroenterology and Hepatology Research Center, Pediatrics Centre of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran; Student Research Committee, Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Barone M, Iannone A, Cristofori F, Dargenio VN, Indrio F, Verduci E, Di Leo A, Francavilla R. Risk of obesity during a gluten-free diet in pediatric and adult patients with celiac disease: a systematic review with meta-analysis. Nutr Rev 2023; 81:252-266. [PMID: 35947766 PMCID: PMC10857815 DOI: 10.1093/nutrit/nuac052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
CONTEXT Obesity is a significant risk factor for many pathological conditions. Whether a gluten-free diet (GFD) is a risk factor for overweight or obesity remains controversial. OBJECTIVE The primary aim of this study was to assess the prevalence of body mass index (BMI) categories at disease presentation and the variation in BMI category from underweight/normal to overweight/obese and vice versa during a GFD. DATA SOURCES PubMed, Scopus, and Web of Science databases were searched through February 2021 for retrospective, cross-sectional, and prospective studies reporting BMI categories at disease diagnosis and during a GFD. DATA EXTRACTION Data were extracted by 2 reviewers independently. Disagreements were resolved by consensus; a third reviewer was consulted, if necessary. Risk of bias was assessed with the Cochrane ROBINS-I tool. DATA ANALYSIS Subgroup analysis based on age (pediatric/adult patients), study design (prospective, cross-sectional, retrospective), and duration of GFD was performed.. Forty-five studies were selected (7959 patients with celiac disease and 20 524 healthy controls). The mean BMI of celiac patients at presentation was significantly lower than that of controls (P < 0.001). During a GFD, the mean BMI increased significantly (mean difference = 1.14 kg/m2 [95%CI, 0.68-1.60 kg/m2]; I2 = 82.8%; P < 0.001), but only 9% of patients (95%CI, 7%-12%; I2 = 80.0%) changed from the underweight/normal BMI category to the overweight/obese category, while 20% (95%CI, 11%-29%; I2 = 85.8%) moved into a lower BMI category. CONCLUSION Most celiac patients had a normal BMI at presentation, although the mean BMI was significantly lower than that of controls. A GFD does not increase the risk of becoming overweight/obese, especially in children. The quality of several studies was suboptimal, with moderate or high overall risk of bias and heterogeneity.
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Affiliation(s)
- Michele Barone
- are with the Gastroenterology Unit, Department of Emergency and Organ Transplantation, University of Bari “Aldo Moro,” Bari, Italy
| | - Andrea Iannone
- are with the Gastroenterology Unit, Department of Emergency and Organ Transplantation, University of Bari “Aldo Moro,” Bari, Italy
| | - Fernanda Cristofori
- are with the Interdisciplinary Department of Medicine, Pediatric Section, University of Bari “Aldo Moro,” Bari, Italy
| | - Vanessa Nadia Dargenio
- are with the Interdisciplinary Department of Medicine, Pediatric Section, University of Bari “Aldo Moro,” Bari, Italy
| | - Flavia Indrio
- is with the Department of Pediatrics, Scientific Institute “Casa Sollievo della Sofferenza,” Foggia, Italy
| | - Elvira Verduci
- is with the Department of Pediatrics, Ospedale dei Bambini “Vittore Buzzi,” Milan, Italy
| | - Alfredo Di Leo
- are with the Gastroenterology Unit, Department of Emergency and Organ Transplantation, University of Bari “Aldo Moro,” Bari, Italy
| | - Ruggiero Francavilla
- are with the Interdisciplinary Department of Medicine, Pediatric Section, University of Bari “Aldo Moro,” Bari, Italy
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Nikniaz Z, Beheshti S, Abbasalizad Farhangi M, Nikniaz L. A systematic review and meta-analysis of the prevalence and odds of eating disorders in patients with celiac disease and vice-versa. Int J Eat Disord 2021; 54:1563-1574. [PMID: 34042201 DOI: 10.1002/eat.23561] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 05/15/2021] [Accepted: 05/15/2021] [Indexed: 12/25/2022]
Abstract
OBJECTIVES In the present systematic review and meta-analysis study, we aimed to review studies that assessed the prevalence and risk of eating disorders (EDs) in patients with celiac disease (CD) and vice-versa. METHOD We conducted a systematic search in PubMed, Embase, Scopus, and Web of Science for studies that assessed the prevalence and risk of AN in patients with CD and vice-versa. Joanna Briggs Institute tools were used for critical appraisal. The STATA software was used for the meta-analysis of the random-effect model. RESULTS In this study, 23 observational studies were included. The results of the meta-analysis indicated that the pooled prevalence of EDs and bulimia nervosa in patients with CD was 8.88% [95% CI: 6.4, 11.7] and 7.26% [95% CI: 0.23, 21.57], respectively. Moreover, the risk of anorexia nervosa in patients with CD was significantly higher than in the healthy population (relative risk [RR]: 1.48 [95% CI: 1.32, 1.64]). The rates of CD in patients with AN and EDs were 0.96% [95% CI: 0.15, 2.31] and 0.90% [95% CI: 0.56, 1.31], respectively. Moreover, the overall risk of CD in patients with AN was significantly higher compared with healthy adults (RR: 2.35 [95% CI: 1.27-3.44]). DISCUSSION The result of the present meta-analysis showed the high prevalence of EDs in patients with CD. Moreover, there was a significant bidirectional association between CD and EDs.
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Affiliation(s)
- Zeinab Nikniaz
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samineh Beheshti
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Leila Nikniaz
- Research Center for Evidence-Based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Nikniaz Z, Asghari Jafarabadi M, Abbasalizad Farhangi M, Shirmohammadi M, Nikniaz L. Determinants of health-related quality of life in patients with celiac disease: a structural equation modeling. Health Qual Life Outcomes 2021; 19:204. [PMID: 34429115 PMCID: PMC8386028 DOI: 10.1186/s12955-021-01842-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 08/12/2021] [Indexed: 11/13/2022] Open
Abstract
Background We aimed to investigate the determinants of Health-related quality of life (HRQOL) in Iranian patients with celiac disease (CD) using the structural equation modeling (SEM). Methods In the present cross-sectional study, a total of 170 adult patients with CD were recruited. The information regarding adherence to diet, symptom severity, and HRQOL were collected using the celiac disease adherence test (CDAT), gastrointestinal symptom rating scale (GSRS), and SF-36 questionnaire respectively. Association between various studied variables and HRQOL was assessed using SEM. The standardized regression weights were used to assess total, direct and indirect effects. The model fit indices were used to assess the “goodness of fit” between the hypothesized models. Results The mean age of participants was 37.57 ± 9.59 years. The results of SEM indicated that the overall fit of our model was acceptable. Adherence to the diet, GSRS score, occupation, and education level was significantly related to PCS of SF-36; and adherence to the diet, GSRS score, and education level were significantly correlated with MCS of SF-36. The analysis of indirect associations indicated that only adherence to diet indirectly via GSRS score was significantly associated with PCS and MCS of SF-36. Conclusion In adult patients with celiac disease, HRQOL was associated with age, education, adherence to GFD, and GSRS score. Additionally, occupation and disease duration were associated with HRQOL only in women and men respectively.
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Affiliation(s)
- Zeinab Nikniaz
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | | | - Masood Shirmohammadi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Leila Nikniaz
- Tabriz Health Services Management Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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The Healthy Gluten-Free Diet: Practical Tips to Prevent Metabolic Disorders and Nutritional Deficiencies in Celiac Patients. GASTROENTEROLOGY INSIGHTS 2021. [DOI: 10.3390/gastroent12020015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The gluten-free diet (GFD) is the cornerstone treatment for coeliac disease (CD). However, a healthy GFD is more complex than the only exclusion of gluten-containing foods. Most celiac patients do not receive nutritional advice and tend to consume industrial gluten-free products (GFPs), which often lack fiber, vitamins, and other micronutrients while being rich in saturated fats and refined sugars. This review focuses on the main potential metabolic disorders and nutritional deficiencies in CD patients at diagnosis and dissects the main nutritional and metabolic issues due to a non-balanced GFD. Nutritional tips to achieve an adequate dietary approach in CD are provided. We also compared the main nutritional components of naturally gluten-free cereals (including pseudocereals) to give an exhaustive overview of the possible healthy alternatives to processed GFPs. Clinicians and dietitians should be systematically involved in the diagnosis of CD to monitor the appropriateness of GFD and the patient’s nutritional status over time.
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Nikniaz Z, Asghari Jafarabadi M, Ghaffarifar S, Saeedi Z, Akbari Namvar Z, Shirmohammadi M. Psychometric properties of the Persian version of the celiac disease adherence test questionnaire. BMC Gastroenterol 2020; 20:247. [PMID: 32727540 PMCID: PMC7389158 DOI: 10.1186/s12876-020-01396-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 07/22/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND A gluten-free diet (GFD) is the only effective treatment for celiac patients and assessing adherence to this diet is important. Celiac disease Adherence Test (CDAT) is a valid English-language questionnaire that is used for assessing the adherence to the GFD. In the present study, we aimed to translate the CDAT questionnaire in Persian and evaluate its validity and reliability. METHODS In the present cross-sectional study, CDAT was translated and back-translated by three bilingual professional translators. Content validity was evaluated by 12 gastroenterologists and nutritionists. To assess the construct validity, 230 patients with celiac disease were randomly selected from the national celiac disease registry database. Internal consistency of the items and test-retest reliability were assessed by Cronbach's alpha and Intraclass Correlation Coefficient (ICC). To assess the convergent validity of the questionnaire, the correlation coefficient between the CDAT score and anti-tissue transglutaminase immunoglobulin A (anti-t-TG-IgA) titer was assessed. RESULTS The content validity index, content validity ratio, and impact score of the Persian version of CDAT (Pv-CDAT) were 0.97, 0.95, and 4.61 respectively. Three significant factors were extracted and according to the confirmatory factor analysis the three-factor model had adequate fitness (chi-square p-value of 0.74, root mean error of approximation: 0.001 [95% CI: 0.001-0.083], comparative fit index: 1, standardized root mean squared residual: 0.04, and coefficient of determination: 0.78). The questionnaire had good feasibility with the floor effect of 3.1% and the ceiling effect of 0.4%. Moreover, it has high internal consistency (Cronbach-alpha: 0.71) and test-retest reliability (ICC: 0.78). The correlations between CDAT categories and anti-tTG-IgA categories showed a significant correlation between the two tests (r = 0.53; P < 0.001). CONCLUSIONS The results of the present study showed that the Pv-CDAT questionnaire with high validity, reliability, and internal consistency can be used for assessing adherence to the GFD in adult celiac patients in Iran.
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Affiliation(s)
- Zeinab Nikniaz
- Liver and gastrointestinal diseases research center, Tabriz University of medical sciences, Tabriz, Iran
| | - Mohammad Asghari Jafarabadi
- Road Traffic Injury Research Center, Department of Epidemiology and Biostatistics, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeideh Ghaffarifar
- Medical Education Research Centre, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Saeedi
- Student research committee, Tabriz University of medical sciences, Tabriz, Iran
| | - Zahra Akbari Namvar
- Student research committee, Tabriz University of medical sciences, Tabriz, Iran
| | - Masood Shirmohammadi
- Liver and gastrointestinal diseases research center, Tabriz University of medical sciences, Tabriz, Iran.
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