International Journal of Endocrinology and Metabolism最新文献

{"title":"A Case Report of ROHHAD Syndrome in an 8-year-old Iranian Boy.","authors":"Abolfazl Amjadipour,&nbsp;Lobat Shahkar,&nbsp;Faridreza Hanafi","doi":"10.5812/ijem.111571","DOIUrl":"https://doi.org/10.5812/ijem.111571","url":null,"abstract":"<p><strong>Introduction: </strong>Rapid-onset obesity concurrently with hypoventilation, hypothalamic, autonomic dysregulation (ROHHAD) is an uncommon disease that presents with multiorgan disorders during early childhood, with fewer than 100 cases reported around the world. We aim to present a case of ROHHAD syndrome admitting with rare neurologic symptoms. We also present our treatment regimen.</p><p><strong>Case presentation: </strong>An 8-year-old boy was admitted to our department with ataxia and gait disturbance that led us to the final diagnosis after a thorough investigation. He had multiple admissions and was treated for other diagnoses. His first symptoms started from age 5 with obstructive apnea. He underwent an adenectomy surgery at that time, but the symptoms continued. A year after the surgery, he was admitted again due to his somnolence but was diagnosed only with hypothyroidism and anemia. At the age of 7 years and 8 months, he was admitted to our department with ataxia and abnormal gait from the past year with instability and numerous falls. He also had shown hyperphagia that had been resulted in 10 kilograms of weight gain in six months. He was experiencing gradual behavioral symptoms, including episodes of self and hetero aggression and impulsivity. His other symptoms included fatigue, somnolence, gastrointestinal dysmotility, hyperhidrosis, central hypothyroidism, polyuria, precocious puberty, and rapid obesity. His laboratory investigation revealed hyperprolactinemia.</p><p><strong>Conclusions: </strong>Our case indicates that ROHHAD is a complex disease with divergent signs and symptoms that needs to be kept in mind for diagnosis and should be treated with a high level of collaboration of various medical specialties. Since late diagnosis of this syndrome leads to a magnificent increase in morbidity and mortality rates, it is vital to pay extreme attention to this syndrome. The diagnosis should be considered even more in children over two years old with rapid-onset obesity, which is accompanied by other symptoms. Here, our patient's complaint was ataxia that revealed the underlying cause after investigation.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 3","pages":"e111571"},"PeriodicalIF":2.1,"publicationDate":"2021-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/4e/a5/ijem-19-3-111571.PMC8453650.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39451549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Longer Time to Reach Excellent Response to Treatment in Familial Versus Sporadic Non-medullary Thyroid Cancer (NMTC): A Matched Case-Control Study.","authors":"Susan Shafiei,&nbsp;Mehrdokht Sadrolodabaei,&nbsp;Atena Aghaei,&nbsp;Narjess Ayati,&nbsp;Samira Zare Namdar,&nbsp;Donya Hemati,&nbsp;Seyed Rasoul Zakavi","doi":"10.5812/ijem.108781","DOIUrl":"https://doi.org/10.5812/ijem.108781","url":null,"abstract":"<p><strong>Background: </strong>Familial non-medullary thyroid cancer (NMTC) are supposed to be more aggressive and require more frequent treatment compared to non-familial thyroid cancer.</p><p><strong>Objectives: </strong>This matched case-control study aimed to compare the response to treatment between the matched case-control groups of familial and sporadic NMTC.</p><p><strong>Methods: </strong>This is a retrospective study in patients with familial NMTC (at least one other first-degree relative involved) who were treated with surgery, followed by radio-iodine therapy (RIT) without consideration of its familial origin. Response to treatment was compared between familial NMTC and age, sex, and TNM stage-matched non-familial NMTC (control group). Response to treatment was assessed one and two years after RIT, and time to excellent response was identified.</p><p><strong>Results: </strong>Out of 2,944 NMTC patients, 81 (2.75%) patients had familial NMTC. We compared 66 patients with familial NMTC and 66 sporadic NMTC patients. There was no significant difference in first thyroglobulin, initial and accumulative iodine dose, and additional treatments (additional surgery and radiotherapy) between patients and controls. Although no significant difference was noted in one and two years' responses to treatment between the case and control groups, familial NMTC patients required more time to achieve excellent response (26.7 ± 24.9 versus 15.9 ± 9.0 months, P = 0.01). No significant difference was noted between familial NMTC patients with two or more than two involved relatives.</p><p><strong>Conclusions: </strong>Our study showed that if patients with familial NMTCs were treated in the same way as non-familial patients, the time to excellent response would be significantly longer, even when they have only one other involved relative.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 2","pages":"e108781"},"PeriodicalIF":2.1,"publicationDate":"2021-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a2/5c/ijem-19-2-108781.PMC8198615.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39249534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Common Limitations and Challenges of Dietary Clinical Trials for Translation into Clinical Practices.","authors":"Parvin Mirmiran,&nbsp;Zahra Bahadoran,&nbsp;Zahra Gaeini","doi":"10.5812/ijem.108170","DOIUrl":"https://doi.org/10.5812/ijem.108170","url":null,"abstract":"<p><p>The progressive development of clinical and public health nutrition has long relied on dietary clinical trials (DCTs), investigating the causal relationship between diet and multiple risk factors of non-communicable and chronic diseases. DCTs are also hallmarks for establishing dietary requirements and promoting overall nutritional health among the population. Despite their critical importance in translation into public health strategies and practices, DCTs have several limitations and challenges for study design, implementation and finding interpretation. The complex nature of nutrition interventions, collinearity between diet components, multi-target effects of the interventions, diverse dietary behaviors, and food culture are the most challenging issues. Furthermore, baseline exposure and dietary status, appropriate control groups, blinding, randomization, and poor adherence undermine the effectiveness of DCTs in translation into practices. Disruptive factors will be minimized if researchers are committed to following good clinical practice (GCP) standards available for common designs of clinical trials. Planning DCTs, however, needs careful considerations for hypothesis generation, study design development, the definition of primary and secondary outcome measures, and target population.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 3","pages":"e108170"},"PeriodicalIF":2.1,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/e8/21/ijem-19-3-108170.PMC8453651.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39474827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evidence Gap and Knowledge Map of Physical Activity Research in Diabetes in Iran: A Scoping Review.","authors":"Mahnaz Sanjari,&nbsp;Shahnaz Esmaeili,&nbsp;Hossein Yarmohammadi,&nbsp;Rasha Atlasi,&nbsp;Maryam Aalaa,&nbsp;Bagher Larijani,&nbsp;Ensieh Nasli-Esfahani","doi":"10.5812/ijem.110636","DOIUrl":"https://doi.org/10.5812/ijem.110636","url":null,"abstract":"<p><strong>Context: </strong>The important role of physical activity in the prevention and management of diabetes necessitates a review of current research to shed light on gaps in national diabetes guidelines.</p><p><strong>Evidence acquisition: </strong>This scoping review was part of the Iran Diabetes Research Roadmap (IDRR) study. A systematic search was used based on the Arksey and O'Malley method consisting of six steps. The descriptive analysis was done with SPSS software. Additionally, VOS veiwer software was used to draw the knowledge map of the included studies.</p><p><strong>Results: </strong>There were 169 articles included from the beginning of 2015 to the end of 2019 in Iran. Aerobic and resistance exercises were types of physical activity with more number of articles. Most of the included clinical studies were randomized clinical trials and had a level of evidence two. Also, there was more interest in outcomes such as glycemic control and insulin sensitivity, metabolic syndrome, metabolism, and cardiovascular health. The network of co-authorship was drawn, and \"controlled study\", \"male\", and \"rat\" were the most frequent keywords.</p><p><strong>Conclusions: </strong>The number of Iranian diabetes researchers on physical activity is increasing, and the majority of clinical studies had a high level of evidence. With maintaining previous interests and investigations, there should be more emphasis on research in elderly and children age groups as evidence gap in Iran. Also, longitudinal cohort studies should be highlighted and Iranian researchers should be encouraged to participate in new topics of research worldwide.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 2","pages":"e110636"},"PeriodicalIF":2.1,"publicationDate":"2021-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/f0/36/ijem-19-2-110636.PMC8198613.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39249536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Iranian National Clinical Practice Guideline for Exercise in Patients with Diabetes.","authors":"Mohammad Hassabi,&nbsp;Alireza Esteghamati,&nbsp;Farzin Halabchi,&nbsp;Amir Hosein Abedi-Yekta,&nbsp;Behnaz Mahdaviani,&nbsp;Bahar Hassanmirzaie,&nbsp;Farhad Hosseinpanah,&nbsp;Majid Valizadeh","doi":"10.5812/ijem.109021","DOIUrl":"https://doi.org/10.5812/ijem.109021","url":null,"abstract":"<p><strong>Context: </strong>Growing evidence highlights the importance of physical activity as a critical element for the prevention and control of diabetes. However, there is no clinical practice guideline focusing on the different aspects of exercise in patients with diabetes, especially for the Iranian population.</p><p><strong>Objective: </strong>We aimed to prepare and adopt a clinical practice guideline to provide well-defined, simple, and concise responses to certain questions related to physical activity and exercise in all patients with diabetes, including type 1, 2, and gestational diabetes mellitus (GDM).</p><p><strong>Evidence acquisition: </strong>A multidisciplinary team of experts in various fields (sports medicine specialists, endocrinologists, and cardiologists) developed the guideline. This group did the task in four stages: (1) identifying and refining the subject area using 17 clinical questions; (2) appraising evidence through a systematic review of the literature; (3) extracting recommendations from evidence and grading them as A, B, C, or D based on the quality, quantity, and consistency of existing evidence; and (4) subjecting the guideline to external review and finally selecting the recommendations with high scores of appropriateness and agreement. The final version was evaluated and approved by the National Deputy for Curative Affairs - Ministry of Health and Medical Education and has also been endorsed by the Iran Endocrine Society (IES) and Iranian Association of Sports and Exercise Medicine (IASEM).</p><p><strong>Results: </strong>The guideline consists of 52 recommendations addressing 17 important questions concerning different aspects of exercise prescription in Iranian patients with diabetes.</p><p><strong>Conclusions: </strong>The guideline provides evidence-based information that may help physicians to prescribe exercise for Iranian patients with diabetes safely and effectively.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 3","pages":"e109021"},"PeriodicalIF":2.1,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b0/95/ijem-19-3-109021.PMC8453655.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39474828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subcutaneous Calcification and Fixed Flexion Deformity of the Right Elbow Joint in a Child with a GNAS Mutation: A Case Report.","authors":"Hussain Alsaffar,&nbsp;Najya Attia,&nbsp;Senthil Senniappan","doi":"10.5812/ijem.110792","DOIUrl":"https://doi.org/10.5812/ijem.110792","url":null,"abstract":"<p><strong>Introduction: </strong>The art of medicine glorifies when a clinician listens carefully to the patient's story, gives a thorough examination, performs appropriate investigations, and finally links findings together to reach a definite diagnosis. An interesting case was reported here, highlighting the integration of different symptoms and manifestations with some relevant biochemical investigations to reach a final diagnosis. To the best of our knowledge, fixed flexion deformity, as a complication of subcutaneous calcification, has not been previously reported in a child with Albright hereditary osteodystrophy (AHO).</p><p><strong>Case presentation: </strong>A 2.5-year-old boy was born at term with a birth weight of 3.5 kg (-0.49 SDS). The child was referred to a general pediatrician with a history of right elbow joint swelling noticed initially at six months of age. He then developed the limitation of right upper arm movement, which slowly progressed afterward. The patient had no history of trauma. At nine months of age, he was diagnosed with hypothyroidism, preceded by cold skin, dry hair, and constipation. At nine years of age, he presented with a fixed flexion deformity of the right elbow associated with markedly limited joint movement and symmetrical hands with hyperpigmented knuckles of right metacarpal bones. Subcutaneous masses were felt along the right forearm, showing tenderness on palpation. Investigations revealed elevated serum parathyroid hormone and normal calcium indicating parathyroid hormone resistance. Further genetic testing revealed GNAS mutation. The child was obese throughout his childhood.</p><p><strong>Conclusions: </strong>This case report describes an obese child with subcutaneous calcification that led to fixed flexion deformity of the elbow, starting at an incredibly early age. Hypothyroidism and pseudohypoparathyroidism raised the suspicion of AHO, which was later confirmed by genetic testing. This is the first case report on fixed flexion deformity in a patient with GNAS mutation (c.719-1G > A Chr20: 57484737) in West Asia.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 2","pages":"e110792"},"PeriodicalIF":2.1,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c0/aa/ijem-19-2-110792.PMC8198617.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39256190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy of Urinary Etiocholanolone/Androsterone Ratio as Alternative to Serum Testosterone/Dihydrotestosterone Ratio for Diagnosis of 5 Alpha-reductase Type 2 Deficiency Patients and Carriers in Indonesia.","authors":"Nanis Sacharina Marzuki,&nbsp;Firman Pratama Idris,&nbsp;Hannie Kartapradja,&nbsp;Shirley Renata,&nbsp;Alida Harahap,&nbsp;Jose Rizal Latief Batubara","doi":"10.5812/ijem.109510","DOIUrl":"https://doi.org/10.5812/ijem.109510","url":null,"abstract":"Background The 5 Alpha-reductase type 2 deficiency (5ARD2) is an inherited condition, which clinically presents as variable degrees of under virilization in affected 46,XY individuals. In the diagnostic pathway of 5ARD2, the testosterone/dihydrotestosterone (T/DHT) ratio is broadly employed before molecular analysis of the SRD5A2 gene. However, due to cost-benefit considerations, the DHT test in our country is routinely lacking in clinical settings; therefore, we considered applying the urinary etiocholanolone/androsterone (Et/An) ratio as an alternative test. Objectives We aimed to determine the diagnostic value of the urinary Et/An ratio versus the T/DHT ratio in diagnosing 5ARD2 patients and carriers. Methods Sixty-six suspected 5ARD2 46,XY disorders of sex development (DSD) individuals and 95 family members were recruited in the study. Their clinical manifestations, T/DHT and urinary Et/An ratios, and SRD5A2 genes were analyzed. Using molecular analysis of the SRD5A2 gene as the gold standard, we compared the accuracy of both ratios in diagnosing 5ARD2 patients and carriers with receiver operating characteristic (ROC) curve analysis. Results Thirty-seven patients were confirmed molecularly to have 5ARD2, and the rest (n = 29) were assessed as normal controls, while in the carrier group, 53 were molecularly confirmed as carriers and 42 as controls. The AUCs (areas under the curve) of the T/DHT and urinary Et/An ratios were 57.7% (95% CI 43.0 - 72.4%, P > 0.05) and 79.7% (95% CI 69.0 - 90.4%, P < 0.001), respectively, in diagnosing 5ARD2 patients and 54.1% (95% CI 42.4 - 65.8%, P > 0.05) and 75.1% (95% CI 65.1 - 85.1%, P < 0.001), respectively, in diagnosing carriers. The cutoff value of the urinary Et/An ratio was set at ≥ 0.95 for detecting 5ARD2 patients and ≥ 0.99 for detecting carriers. Conclusions The testosterone/DHT ratio was inaccurate in diagnosing 5ARD2 patients. When molecular analysis for the SRD5A2 gene is lacking, the urinary Et/An ratio may be a useful test to diagnose 5ARD2 patients and carriers.","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 2","pages":"e109510"},"PeriodicalIF":2.1,"publicationDate":"2021-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/88/8c/ijem-19-2-109510.PMC8198621.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39249535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Association Between Male Infertility and Cardiometabolic Disturbances: A Population-Based Study.","authors":"Samira Behboudi-Gandevani,&nbsp;Razieh Bidhendi Yarandi,&nbsp;Marzieh Rostami Dovom,&nbsp;Fereidoun Azizi,&nbsp;Fahimeh Ramezani Tehrani","doi":"10.5812/ijem.107418","DOIUrl":"https://doi.org/10.5812/ijem.107418","url":null,"abstract":"<p><strong>Background: </strong>Further studies are needed to extend our knowledge about the association between male infertility and cardio-metabolic disorders.</p><p><strong>Objectives: </strong>We aimed to assess the association between male infertility and cardiometabolic disturbances using a population-based design.</p><p><strong>Methods: </strong>In total, 1611 participants of the Tehran-Lipid and Glucose-Study (phase III) were categorized into two groups of men with documented male infertility (n = 88) and those with at least one live birth and no history of primary infertility (n = 1523). Logistic regression was applied to explore the association between male infertility and cardiometabolic disturbances, including diabetes mellitus, pre-diabetes, hypertension, metabolic syndrome, dyslipidemia, obesity, central obesity, and chronic kidney disease, following adjustment for age and body mass index (BMI).</p><p><strong>Results: </strong>The unadjusted model revealed a significant association between infertility and hypertension and CKD (OR = 1.8; 95% CI: 1.2, 2.9, P-value = 0.006 and OR = 1.9; 95% CI: 1.1, 3.6, P-value = 0.033), respectively. However, after adjusting for age and BMI, as potential confounders, this association was not significant. Moreover, there was no association between infertility and other cardiometabolic disturbances, including diabetes and pre-diabetes, metabolic syndrome, dyslipidemia, obesity, and central obesity in both unadjusted and adjusted models.</p><p><strong>Conclusions: </strong>Our study revealed no association between male infertility and cardiometabolic disturbances. The findings can pave the way for further studies to extend our knowledge in this field. More population-based studies with a large sample size are warranted to confirm these findings.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 2","pages":"e107418"},"PeriodicalIF":2.1,"publicationDate":"2021-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/0c/da/ijem-19-2-107418.PMC8198602.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39249533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association Between Serum Nitric Oxide Level and Changes in Thyroid Function Test in a Population-based Study: Tehran Thyroid Study Participants (TTS).","authors":"Behnaz Ghazisaeidi,&nbsp;Farzaneh Sarvghadi,&nbsp;Asghar Ghasemi,&nbsp;Maryam Tohidi,&nbsp;Fereidoun Azizi,&nbsp;Atieh Amouzegar","doi":"10.5812/ijem.109214","DOIUrl":"https://doi.org/10.5812/ijem.109214","url":null,"abstract":"<p><strong>Background: </strong>Nitric oxide (NO) plays a key role in thyroid function regulation through the inhibition of iodide (I) uptake at the thyroidal sodium-iodide symporter (NIS) and impacts on the thyroid vascularity and blood flow.</p><p><strong>Objectives: </strong>This study aimed to evaluate the association between serum NO metabolites (NOx) and thyroid-stimulating hormone (TSH), free thyroxin (FT4), and anti-thyroid peroxidase (TPOAb) changes. Also, it aimed at evaluating the correlation between serum NOx and the incidence of clinical hypothyroidism, characterized by elevated TSH level and decreased FT4 concentration, and subclinical hypothyroidism, characterized by mildly elevated TSH level despite FT4 concentration within the normal range, over three years of follow-up.</p><p><strong>Methods: </strong>This study included 1,137 participants of the Tehran Thyroid study (TTS), aged > 20 years old, for whom data on serum TSH, FT4, and TPOAb in the third and fourth phases, and serum NOx in the third phase were available. Changes in TSH (ΔTSH), FT4 (ΔFT4), and TPOAb (ΔTPO) between the third and fourth phases were calculated, and the associations between serum NOx and ΔTSH, ΔFT4, and ΔTPOAb were assessed after multivariable adjustment using linear regression analysis.</p><p><strong>Results: </strong>No significant association was found between serum NOx and ΔTSH, ΔFT4, and ΔTPOAb after the multivariable adjustment; neither was any observed in TPOAb split groups after multivariable adjustment. No significant association was found between serum NOx tertiles and clinical and subclinical hypothyroidism incidence in the fourth phase of TTS.</p><p><strong>Conclusions: </strong>There was no association between serum NOx levels and changes in TSH, FT4, and TPOAb and clinical and subclinical hypothyroidism incidence.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 3","pages":"e109214"},"PeriodicalIF":2.1,"publicationDate":"2021-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/09/62/ijem-19-3-109214.PMC8453649.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39451548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction Models for Type 2 Diabetes Risk in the General Population: A Systematic Review of Observational Studies.","authors":"Samaneh Asgari,&nbsp;Davood Khalili,&nbsp;Farhad Hosseinpanah,&nbsp;Farzad Hadaegh","doi":"10.5812/ijem.109206","DOIUrl":"https://doi.org/10.5812/ijem.109206","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to provide an overview of prediction models of undiagnosed type 2 diabetes mellitus (U-T2DM) or the incident T2DM (I-T2DM) using the transparent reporting of a multivariable prediction model for individual prognosis or diagnosis (TRIPOD) checklist and the prediction model risk of the bias assessment tool (PROBAST).</p><p><strong>Data sources: </strong>Both PUBMED and EMBASE databases were searched to guarantee adequate and efficient coverage.</p><p><strong>Study selection: </strong>Articles published between December 2011 and October 2019 were considered.</p><p><strong>Data extraction: </strong>For each article, information on model development requirements, discrimination measures, calibration, overall performance, clinical usefulness, overfitting, and risk of bias (ROB) was reported.</p><p><strong>Results: </strong>The median (interquartile range; IQR) number of the 46 study populations for model development was 5711 (1971 - 27426) and 2457 (2060 - 6995) individuals for I-T2DM and U-T2DM, respectively. The most common reported predictors were age and body mass index, and only the Qrisk-2017 study included social factors (e.g., Townsend score). Univariable analysis was reported in 46% of the studies, and the variable selection procedure was not clear in 17.4% of them. Moreover, internal and external validation was reported in 43% the studies, while over 63% of them reported calibration. The median (IQR) of AUC for I-T2DM models was 0.78 (0.74 - 0.82); the corresponding value for studies derived before October 2011 was 0.80 (0.77 - 0.83). The highest discrimination index was reported for Qrisk-2017 with C-statistics of 0.89 for women and 0.87 for men. Low ROB for I-T2DM and U-T2DM was assessed at 18% and 41%, respectively.</p><p><strong>Conclusions: </strong>Among prediction models, an intermediate to poor quality was reassessed in several aspects of model development and validation. Generally, despite its new risk factors or new methodological aspects, the newly developed model did not increase our capability in screening/predicting T2DM, mainly in the analysis part. It was due to the lack of external validation of the prediction models.</p>","PeriodicalId":13969,"journal":{"name":"International Journal of Endocrinology and Metabolism","volume":"19 3","pages":"e109206"},"PeriodicalIF":2.1,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/65/3b/ijem-19-3-109206.PMC8453657.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39474825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}