scholarly journals Association of vitamin D insufficiency with adiposity and metabolic disorders in Brazilian adolescents

2013 ◽  
Vol 17 (4) ◽  
pp. 787-794 ◽  
Author(s):  
Renata MS Oliveira ◽  
Juliana F Novaes ◽  
Lorena M Azeredo ◽  
Ana Paula C Cândido ◽  
Isabel CG Leite
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Parathyroid Hormone ◽  
Metabolic Disorders ◽  
Central City ◽  
Vitamin D Insufficiency ◽  
Model Assessment ◽  
Cross Sectional ◽  
Vitamin D Intake ◽  
Dietary Record

AbstractObjectiveThe present study aimed to evaluate the frequency of deficiency/insufficiency of vitamin D in adolescents and its relationship to overweight and metabolic disorders.DesignCross-sectional study. Nutritional status was assessed by BMI according to WHO recommendations. Dietary intake was evaluated using a 3 d dietary record. The biochemical evaluation comprised measurements of serum lipids, lipoproteins, glucose, insulin, calcidiol (25(OH)D) and parathyroid hormone. Insulin resistance was calculated using the homeostasis model assessment. Body composition and blood pressure were assessed.SettingFifteen schools (eight public and seven private) in the central city of Juiz de Fora, Brazil.SubjectsThe analysis included a study population of 160 adolescents (seventy-seven eutrophic and eighty-three overweight) aged 15 to 17 years.ResultsVitamin D deficiency and insufficiency was observed in 1·25 and 70·6 % of adolescents, respectively. Serum 25(OH)D levels were statistically lower in adolescents with weight excess, abdominal obesity, hypercholesterolaemia, higher levels of parathyroid hormone, insulin resistance, hyperinsulinaemia and hypertension (P < 0·05). Lower BMI and waist circumference were observed in the third (highest) tertile of vitamin D intake for all adolescents. The high prevalence of vitamin D insufficiency is primarily nutritional and reflects a low vitamin D intake.ConclusionsOur results support the negative association among serum 25(OH)D levels and vitamin D intake with non-skeletal outcomes in Brazilian adolescents. Vitamin D fortification of foods and/or the use of vitamin D supplements need to be considered to raise vitamin D intake in the adolescent population, even in a sunny country like Brazil.

scholarly journals Serum 25(OH)D Level and Parathyroid Hormone in Chinese Adult Population: A Cross-Sectional Study in Guiyang Urban Community from Southeast of China

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Zhang Qiao ◽  
Shi Li-xing ◽  
Peng Nian-chun ◽  
Xu Shu-jing ◽  
Zhang Miao ◽  
...  
Keyword(s):  
Vitamin D ◽  
Parathyroid Hormone ◽  
Secondary Hyperparathyroidism ◽  
Adult Population ◽  
Cross Sectional Study ◽  
Vitamin D Insufficiency ◽  
Cluster Sampling ◽  
Cross Sectional ◽  
The Mean ◽  
Serum Pth

Objective. To evaluate vitamin D status and serum parathyroid hormone (IPTH) of healthy adults living in Guiyang.Design and Participants. We conducted a cross-sectional evaluation in the General Community in Guiyang by cluster sampling method. The data was a part of 1510 participants (634 men, 876 women) aged 20–79 years median 45.2 years from November 2009 to February 2010 in Guiyang Health Measures Survey.Measurements. Aradioimmunoassay was used to measure the level of 25-hydroxyvitamin D [25(OH)D] and intact parathyroid hormone (iPTH).Results.The mean serum 25(OH)D level was (20.4 ± 9.0) ng/mL and the highest level among participants aged 40–59 years (22.8 ng/mL). The mean serum PTH level was (32.1 ± 13.7) pg/mL and the lowest level among participants aged 40–50 years (30.8 ng/mL). Serum 25(OH)D was below 50 nmol/liter in 52.3%, below 75 nmol/liter in 84.6%, and above 75 nmol/liter in 15.4% of the respondents. Secondary hyperparathyroidism was 5.4% (5.4% among men and 4.6% among women). The prevalence of secondary hyperparathyroidism increased (5.8%, 6.5%, and 7.1%, resp.) with decreasing serum 25(OH)D levels among subjects who were 30 to 20, 19.9 to 10, and <10 ng/mL, respectively. Serum 25(OH)D was inversely associated with serum PTH.Conclusions. Vitamin D insufficiency and its complication of secondary hyperparathyroidism are common.

Leptin, vitamin D, and cardiorespiratory fitness as risk factors for insulin resistance in European adolescents: gender differences in the HELENA Study

2014 ◽  
Vol 39 (5) ◽  
pp. 530-537 ◽  
Author(s):  
David Jiménez-Pavón ◽  
María A. Sesé ◽  
Jara Valtueña ◽  
Magdalena Cuenca-García ◽  
Marcela González-Gross ◽  
...  
Keyword(s):  
Risk Factors ◽  
Insulin Resistance ◽  
Vitamin D ◽  
Cardiorespiratory Fitness ◽  
Body Fat ◽  
School Setting ◽  
Model Assessment ◽  
Cross Sectional ◽  
Gender Dimorphism ◽  
Modifiable Factors

The purpose of this study was to identify the relevance of a set of risk factors for insulin resistance in adolescents from Europe and to consider their possible gender-specific associations. The Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS) was conducted in 1053 European adolescents (mean age, 14.9 years) in a school setting in 9 countries. Three anthropometric markers of body fat and a dietary index were calculated. Total energy intake was estimated from a questionnaire. C-reactive protein, leptin, and vitamin D were assessed, and physical activity, cardiorespiratory fitness, and muscular strength were measured. Center, socioeconomic status, pubertal status, and season were used as potential confounders. The main outcome was the homeostasis model assessment used as a marker of insulin resistance. Correlations, analyses of covariance, and logistic regression models were used. In males, leptin was the only risk factor for insulin resistance after adjusting for confounders including markers of body fat (odds ratios (ORs) from 1.49 to 1.60). In females, leptin, vitamin D, and fitness were the remaining independent risk factors for insulin resistance after adjustments (OR 2.11; 95% confidential interval (CI) 1.29-3.45; OR 0.50, 95% CI 0.31-0.80; and OR 0.54, 95% CI 0.33-0.87, respectively). Our observations suggest a gender dimorphism in the identification of risk factors for high insulin resistance. Preventive strategies should focus on improving modifiable factors such as cardiorespiratory fitness and on ensuring vitamin D sufficiency. Randomized controlled trials focusing on these strategies are necessary to test their efficacy.

scholarly journals Vitamin D status in children and adults in Sweden: dietary intake and 25-hydroxyvitamin D concentrations in children aged 10–12 years and adults aged 18–80 years

2020 ◽  
Vol 9 ◽  
Author(s):  
Cecilia Nälsén ◽  
Wulf Becker ◽  
Monika Pearson ◽  
Peter Ridefelt ◽  
Anna Karin Lindroos ◽  
...  
Keyword(s):  
Vitamin D ◽  
Dietary Intake ◽  
Dietary Factors ◽  
Winter Period ◽  
Cross Sectional ◽  
Hydroxyvitamin D ◽  
Vitamin D Intake ◽  
Dietary Record ◽  
25 Hydroxyvitamin D ◽  
Vitamin D Supplements

Abstract The study aimed to estimate vitamin D intake and plasma/serum 25-hydroxyvitamin D (25(OH)D) concentrations, investigate determinants of 25(OH)D concentrations and compare two 25(OH)D assays. We conducted two nationwide cross-sectional studies in Sweden with 206 school children aged 10–12 years and 1797 adults aged 18–80 years (n 268 provided blood samples). A web-based dietary record was used to assess dietary intake. Plasma/serum 25(OH)D was analysed by liquid chromatography-mass spectrometry (LC-MS) and immunoassay in adults and LC-MS/MS in children. Most participants reported a vitamin D intake below the average requirement (AR), 16 % of children and 33 % of adults met the AR (7⋅5 μg). In adults, plasma 25(OH)D below 30 and 50 nmol/l were found in 1 and 18 % of participants during the summer period and in 9 and 40 % of participants during the winter period, respectively. In children, serum 25(OH)D below 30 and 50 nmol/l were found in 5 and 42 % of participants (samples collected March–May), respectively. Higher 25(OH)D concentrations were associated with the summer season, vacations in sunny locations (adults), and dietary intake of vitamin D and use of vitamin D supplements, while lower concentrations were associated with a higher BMI and an origin outside of Europe. Concentrations of 25(OH)D were lower using the immunoassay than with the LC-MS assay, but associations with dietary factors and seasonal variability were similar. In conclusion, vitamin D intake was lower than the AR, especially in children. The 25(OH)D concentrations were low in many participants, but few participants had a concentration below 30 nmol/l.

scholarly journals Vitamin D insufficiency/deficiency is associated with insulin resistance in Brazilian children, regardless of body fat distribution

2017 ◽  
Vol 20 (16) ◽  
pp. 2878-2886 ◽  
Author(s):  
Luana Cupertino Milagres ◽  
Naruna Pereira Rocha ◽  
Mariana de Santis Filgueiras ◽  
Fernanda Martins de Albuquerque ◽  
Ana Paula Pereira Castro ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Representative Sample ◽  
Prevalence Ratio ◽  
Population Based ◽  
Vitamin D Insufficiency ◽  
Central Adiposity ◽  
Anthropometric Measures ◽  
Cross Sectional ◽  
Study Results

AbstractObjectiveTo assess the prevalence of vitamin D insufficiency and deficiency and its association with cardiometabolic risk factors, controlled by adiposity, in a representative sample of prepubescent children.DesignCross-sectional population-based study. Body composition was evaluated by dual-energy X-ray absorptiometry. Anthropometric measures and blood pressure were performed. Laboratory analyses were performed to determine the levels of vitamin D (25-hydroxyitamin D; 25(OH)D), glucose, insulin, serum lipids and intact parathyroid hormone. Dietary intake was assessed by three 24 h recalls.SettingViçosa, Minas Gerais, Brazil, 2015.SubjectsRepresentative sample of 378 children aged 8 and 9 years from urban schools.ResultsInadequate serum concentrations of 25(OH)D were diagnosed in more than half of the children and none of them met the recommended vitamin D intake. After adjusting for confounding factors in the multiple regression analysis, lower prevalence of insulin resistance and hypertriacylglycerolaemia was found in children with serum 25(OH)D levels ≥75 nmol/l (prevalence ratio=0·25; 95 % CI 0·08, 0·85) and ≥50 nmol/l (prevalence ratio=0·61; 95 % CI 0·37, 0·99), respectively. However, after adjusting for different indicators of adiposity, insulin resistance remained independently associated and the association with hypertriacylglycerolaemia was lost after adjusting for central adiposity. The prevalence of vitamin D insufficiency/deficiency was associated with the number of cardiometabolic alterations in children.ConclusionsThe study results showed that prevalence of vitamin D insufficiency/deficiency was high among the children and insulin resistance was the main cardiometabolic alteration associated with this condition, even in a tropical climate country such as Brazil.

scholarly journals The influence of puberty on vitamin D status in obese children and the possible relation between vitamin D deficiency and insulin resistance

2015 ◽  
Vol 28 (1-2) ◽  
Author(s):  
Sonsoles Gutiérrez Medina ◽  
Teresa Gavela-Pérez ◽  
María Nieves Domínguez-Garrido ◽  
Elisa Gutiérrez-Moreno ◽  
Adela Rovira ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Standard Deviation Score ◽  
Normal Weight ◽  
Model Assessment ◽  
Vitamin D Status ◽  
Cross Sectional ◽  
Prepubertal Children ◽  
Vitamin D Levels

Abstract: Puberty can affect vitamin D levels.The goal of this study was to analyze the relation between vitamin D deficiency and puberty in obese Spanish children, along with the possible interrelation between vitamin D status and degree of insulin resistance.A cross-sectional study was carried out, in which clinical and biochemical data were gathered from 120 obese and 50 normal weight children between January 2011 and January 2013.: Mean vitamin D levels were 19.5 and 31.6 ng/mL in obese pubertal and obese prepubertal children, respectively. About 75% of the obese pubertal subjects and 46% of the obese prepubertal subjects had vitamin D deficiency. Vitamin D levels were significantly lower in pubescent subjects compared with pre-pubescent subjects in summer, fall, and winter. There was no apparent relation between vitamin D levels and homeostasis model assessment index for insulin resistence (expressed in standard deviation score for sex and Tanner stage) in either puberty or pre-puberty.: Puberty may be a risk factor for the vitamin D deficiency commonly found in the obese child population. This deficiency is not associated with higher insulin resistance in obese pubertal children compared with obese prepubertal children.

scholarly journals 25(OH)D was Correlated with Increased Risk of Insulin Resistance, but Not Mediated by Adiponectin and hsCRP

2012 ◽  
Vol 4 (2) ◽  
pp. 84
Author(s):  
Anggi Kartikawati ◽  
Yani Lina ◽  
Andi Wijaya
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Cell Function ◽  
Resistance Index ◽  
High Sensitivity ◽  
Significant Negative Correlation ◽  
Vitamin D Insufficiency ◽  
Enzyme Linked Immunosorbent Assay ◽  
Cross Sectional ◽  
Increased Risk

BACKGROUND: Studies have shown that change of calcium and vitamin D homeostasis is associated with insulin resistance, decreased beta cell function, metabolic syndrome, glucose intolerance and diabetes. Evidence suggests that vitamin D insufficiency is inversely related to risk of metabolic disorders including type-2 Diabetes Mellitus (T2DM), although the underlying mechanisms are not yet understood. Hence, current study was conducted to investigate correlation between 25(OH)D and insulin resistance through adiponectin or High Sensitivity C-Reactive Protein (hsCRP) in centrally obese men.METHODS: This was a cross-sectional study involving 80 centrally obese men with waist circumference (WC) >90 cm and age 30-60 years. Total 25(OH)D concentration was measured by Enzyme-Linked Immunosorbent Assay (ELISA) method. Insulin resistance was calculated by HOMA model.RESULTS: This study showed there was no correlation of 25(OH)D-WC (r=0.006 and p=0.957), 25(OH)D-adiponectin (r=0.179 and p=0.111) abd 25(OH)D-hsCRP (r=-0.223 and p=0.334), but we observed  statistically significant negative correlation between 25(OH)D and insulin resistance index (HOMA-IR) (r=0.461 and p=0.041).CONCLUSIONS: We conclude that low 25(OH)D concentration was significantly associated with increased risk of insulin resistance. Since  the adiponectin or hsCRP was not correlated, the possible pathways need to be futher investigated.KEYWORDS: central obesity, 25(OH)D, adiponectin, hsCRP, insulin resistance (HOMA-IR)

scholarly journals Vitamin D status is not related to insulin resistance in different phenotypes of moderate obesity

2017 ◽  
Vol 42 (4) ◽  
pp. 438-442 ◽  
Author(s):  
Manal Al Masri ◽  
Ahmed Jerome Romain ◽  
Catherine Boegner ◽  
Laurent Maimoun ◽  
Denis Mariano-Goulart ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Vitamin D ◽  
Plasma Lipids ◽  
Cross Sectional Study ◽  
Model Assessment ◽  
Vitamin D Status ◽  
Cross Sectional ◽  
Insulin Resistant ◽  
Metabolically Healthy Obese ◽  
N 93

Low plasma 25-hydroxy-vitamin D (25OHD) and high levels of parathyroid hormone (PTH) are associated with obesity and could play a role in the occurrence of complications such as insulin resistance. The objective of the study was to evaluate whether the relationship between 25OHD status and phosphocalcic parameters differs between metabolically healthy obese (MHO) and insulin-resistant obese (IRO). This cross-sectional study included 158 consecutive adults (121 females) with obesity (body mass index (BMI) 35.15 ± 2.8 kg/m2), aged 43.21 ± 13.6 years. Serum 25OHD, calcemia, phosphatemia, PTH, plasma lipids, fasting plasma glucose, insulin levels, and body composition were measured. Participants were classified as MHO (n = 65) or IRO (n = 93) based on homeostatic model assessment insulin-resistance value. IRO patients had a higher BMI (p = 0.001), waist circumference (p = 0.03), and trunk fat mass (p = 0.007) than MHO patients. Mean HbA1c (p = 0.03), triglycerides (p = 0.02), and hsCRP (p = 0.04) plasmatic levels were increased in the IRO group. No between-group difference was found on 25OHD, PTH, calcium, or phosphorus plasmatic levels. Only age-predicted 25OHD levels were identified among IRO participants, whereas no factors were identified in MHO. No predictive factors of PTH plasmatic level were identified in the IRO and MHO groups. Although MHO and IRO patients have different metabolic profiles, we did not detect any difference regarding either 25OHD or PTH. Insulin resistance was not a predictive factor of vitamin D status. Our results confirm the absence of link between vitamin D status and insulin resistance in moderate obesity.

scholarly journals Vitamin D, parathyroid hormone and the metabolic syndrome in middle-aged and older European men

2009 ◽  
Vol 161 (6) ◽  
pp. 947-954 ◽  
Author(s):  
David M Lee ◽  
Martin K Rutter ◽  
Terence W O'Neill ◽  
Steven Boonen ◽  
Dirk Vanderschueren ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Parathyroid Hormone ◽  
Population Based ◽  
Community Dwelling ◽  
Model Assessment ◽  
Middle Aged ◽  
Cross Sectional ◽  
The Metabolic Syndrome ◽  
The Relationship

ObjectivesLow serum 25-hydroxyvitamin D (25(OH)D) and elevated parathyroid hormone (PTH) levels have been linked to insulin resistance, the metabolic syndrome (MetS) and its components. Data in healthy, community-dwelling Europeans are lacking, and previous studies have not excluded subjects receiving drug treatments that may distort the relationship between 25(OH)D/PTH and MetS. The aim of our analysis was to examine the association of 25(OH)D and PTH with Adult Treatment Panel III-defined MetS in middle-aged and older European men.DesignThis was a population-based, cross-sectional study of 3369 men aged 40–79 years enrolled in the European Male Ageing Study.ResultsAfter exclusion of subjects with missing data, 3069 men with a mean (±s.d.) age of 60±11 years were included in the analysis. Age-adjusted 25(OH)D levels were inversely associated with waist circumference, systolic blood pressure (BP), triglycerides, and glucose (all P<0.01). Age-adjusted PTH levels were only associated with waist and diastolic BP (both P<0.05). After adjusting for age, centre, season and lifestyle factors the odds for MetS decreased across increasing 25(OH)D quintiles (odds ratios 0.48 (95% confidence intervals 0.36–0.64) highest versus lowest quintile; Ptrend<0.001). This relationship was unchanged after adjustment for PTH, but was attenuated after additional adjustment for homoeostasis model assessment of insulin resistance (0.60 (0.47–0.78); Ptrend<0.001). There was no association between PTH and MetS.ConclusionsOur results demonstrate an inverse relationship between 25(OH)D levels and MetS, which is independent of several confounders and PTH. The relationship is partly explained by insulin resistance. The clinical significance of these observations warrants further study.

scholarly journals Vitamin D deficiency is associated with orthostatic hypotension in older men: a cross-sectional analysis from the British Regional Heart Study

2020 ◽  
Author(s):  
Artaza Gilani ◽  
Sheena E Ramsay ◽  
Paul Welsh ◽  
Olia Papacosta ◽  
Lucy T Lennon ◽  
...  
Keyword(s):  
Vitamin D ◽  
Logistic Regression ◽  
Parathyroid Hormone ◽  
Orthostatic Hypotension ◽  
Vitamin D Deficiency ◽  
Vitamin D Insufficiency ◽  
Multiple Logistic Regression ◽  
Cross Sectional ◽  
Cross Sectional Analysis ◽  
Sectional Analysis

Abstract Background orthostatic hypotension (OH) that occurs within, or at, 1 minute of standing is associated with higher risk of falls, myocardial infarction, syncope and mortality, compared to OH that occurs after 1 minute of standing. Whether vitamin D deficiency increases the risk of OH is controversial. Methods this was a cross-sectional analysis of 3,620 older, community-dwelling men. Multinomial, multiple logistic regression models were used to calculate the risk of OH across categories of vitamin D status (deficient [&lt;25 nmol/l], insufficient [≥25–&lt;50 nmol/l] and sufficient [≥50 nmol/l]) and parathyroid hormone quintile. Results men with vitamin D deficiency were more likely to have OH that occurred within 1 minute of standing in univariate logistic regression (OR 1.88, 95% CI 1.40–2.53) and multinomial, multiple logistic regression (OR 1.51, 95% CI 1.06–2.15), compared to men with sufficient levels of vitamin D. Vitamin D insufficiency was not associated with the risk of OH. Elevated parathyroid hormone was not associated with risk of OH. Conclusion the absence of an association between vitamin D insufficiency and risk of OH and the presence of an association between vitamin D deficiency and risk of OH suggest that there may be a threshold effect; it is only below a particular level of vitamin D that risk of OH is increased. In this cohort, the threshold was &lt;25 nmol/l. Future work should investigate whether treating vitamin D deficiency can improve postural blood pressure or if preventing vitamin D deficiency reduces the incidence of OH.

Clinical factors correlated with vitamin D deficiency in patients with obesity scheduled for bariatric surgery: A single center experience

2020 ◽  
Vol 90 (3-4) ◽  
pp. 346-352
Author(s):  
Vincenzo Pilone ◽  
Salvatore Tramontano ◽  
Carmen Cutolo ◽  
Federica Marchese ◽  
Antonio Maria Pagano ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Serum Vitamin ◽  
Inverse Correlation ◽  
Model Assessment ◽  
Cross Sectional ◽  
Serum Vitamin D ◽  
Female Sex ◽  
Vitamin D Levels

Abstract. We aim to assess the prevalence of vitamin D deficiency (VDD) in patients scheduled for bariatric surgery (BS), and to identify factors that might be associated with VDD. We conducted a cross-sectional observational study involving all consecutive patients scheduled for BS from 2017 to 2019. The exclusion criteria were missing data for vitamin D levels, intake of vitamin D supplements in the 3 months prior to serum vitamin D determination, and renal insufficiency. A total of 206 patients (mean age and body mass index [BMI] of 34.9 ± 10.7 years, and 44.3 ± 6.99 kg/m2, respectively) met the inclusion criteria and were enrolled for data analysis. VDD (<19.9 ng/mL), severe VDD (<10 ng/mL), and vitamin D insufficiency (20–29.9 ng/mL) were present in 68.8 %, 12.5 %, and 31.2 % of patients, respectively. A significant inverse correlation was found between vitamin D levels and initial BMI, parathyroid hormone, and homeostatic model assessment of insulin resistance (r = −0.280, p < 0.05; r = −0.407, p = 0.038; r = −0.445, p = 0.005), respectively. VDD was significantly more prevalent in patients with higher BMI [−0.413 ± 0.12, CI95 % (−0.659; −0.167), p = 0.006], whereas no significant association between hypertension [−1.005 ± 1.65, CI95 % (−4.338; 2.326), p = 0.001], and diabetes type 2 (T2D) [−0.44 ± 2.20, CI95 % (−4.876; 3.986), p = 0.841] was found. We observed significant association between female sex and levels of vitamin D [6.69 ± 2.31, CI95 % (2.06; 11.33), p = 0.006]. The present study shows that in patients scheduled for BS, VDD deficiency is common and was associated with higher BMI, and female sex.

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