Prevalencia de niveles bajos de 25(OH)-vitamina D en universitarios costarricenses / Prevalence of low 25 OH-Vitamin D levels in Costa Rican university students

Resumen Objetivo: Describir la prevalencia de hipovitaminosis D3 y sus características clínicas y bioquímicas en una población de universitarios costarricenses. Métodos: Investigación transversal y descriptiva en un total de 118 individuos sanos, de ambos sexos, con edades entre los 18-43 años. Se preguntó sobre historia familiar de enfermedades crónicas, nivel de exposición al sol, uso de protectores solares, presión arterial. En el laboratorio, se analizaron en suero: glucosa, calcio, fosfato, hormona paratiroidea, insulina, 25 OH-Vitamina D e inmunoglobulina E. Se calcularon el índice de masa corporal y el modelo matemático de evaluación para la homeostasis de la resistencia a la insulina. Resultados: La prevalencia de hipovitaminosis D3 (<30 ng/mL) en este estudio fue de 25% sin diferencia significativa por sexo. La concentración promedio de 25 OH-vitamina D fue 36,2 ng/mL, con valores que van desde 14,5 a 59,5 ng/mL. Un total de 26 estudiantes presentaba insuficiencia de 25 OH-vitamina D (21-29 ng/mL) y solamente 4 fueron clasificados con una deficiencia grave (<20 ng/mL). No se encontraron casos de hipervitaminosis D3 (>100 ng/mL) en la muestra de estudio. Al comparar aquellos sujetos con deficiencia de 25 OH-Vitamina D3 contra los que presentaron niveles séricos normales de esta vitamina, se observaron diferencias significativas solamente en dos parámetros bioquímicos: insulina (10,9 ± 7,4 µUI/ mL vs 8,3 ± 4,1 µUI/mL; p=0,017) y el índice HOMA IR (2,48 ± 1,86 vs 1,85 ± 0,3; p=0,002). Cerca de la mitad de los estudiantes relataron antecedentes familiares de diabetes mellitus (49,2%) e hipertensión arterial (52,9%). El 29% de los participantes tenía sobrepeso y obesidad. Conclusiones: El 25% de los sujetos estudiados presentó deficiencia de 25 OH-Vitamina D. Estos sujetos, a su vez, presentaron una mayor prevalencia de hiperinsulinemia y resistencia a la insulina en comparación con personas con concentraciones normales de esta vitamina. También existe una alta prevalencia de factores de riesgo entre los familiares de la población joven, los cuales podrían aumentar el riesgo de estos estudiantes de padecer diabetes mellitus o enfermedades cardiovasculares en un futuro cercano.

Abstract Objective: To determine the prevalence of hypovitaminosis D3 in a population of Costa Rican University students and describe its clinical and biochemical characteristics. Methods: Cross-sectional and descriptive research with a total of 118 healthy individuals of both genders aged between 18-43 years. Questions were asked about family history of chronic diseases, level of sun exposure, use of sunscreens, blood pressure. In the laboratory, glucose, calcium, phosphate, parathyroid hormone, insulin, 25 OH-Vitamin D and immunoglobulin E were analyzed in serum. Body Mass Index and the mathematical assessment model for the homeostasis of insulin resistance were calculated. Results: The prevalence of hypovitaminosis D3 (<30 ng/mL) in this study was 25% with no significant difference by sex. The average concentration of 25 OH-Vitamin D was 36.2 ng/mL, with values ranging from 14.5 to 59.5 ng/mL. A total of 26 students had 25 OH- Vitamin D insufficiency (21-29 ng/mL) and only 4 were classified as severely deficient (<20 ng/mL). No cases of hypervitaminosis D3 (> 100 ng/mL) were found in the study sample. When comparing those subjects with 25 OH-Vitamin D3 deficiency against those with normal serum levels of this vitamin, significant differences were observed only in two biochemical parameters: insulin (10.9 ± 7.4 µIU/mL vs 8.3 ± 4.1 µUI/mL; p=0.017) and the HOMA IR index (2.48 ± 1.86 vs 1.85 ± 0.3; p=0.002). Nearly half of the students reported a family history of Diabetes Mellitus (49.2%) and arterial hypertension (52.9%). Near 29% of the participants were overweight and obese. Conclusions: Around 25% of the subjects studied presented 25 OH-Vitamin D deficiency. These subjects, in turn, presented a higher prevalence of hyperinsulinemia and insulin resistance compared with people with normal concentrations of this vitamin. There is also a high prevalence of risk factors among the relatives of the young population that could increase the risk of these students of suffering from Diabetes Mellitus or cardiovascular diseases in the future.

Functionality and 25-hydroxyvitamin D levels in institutionalized older adults / Funcionalidade e níveis de 25-hidroxivitamina D em idosos institucionalizados

OBJECTIVES: To evaluate the frequency of hypovitaminosis D among older adults and its association with the level of functionality. METHODS: This cross-sectional observational study of older adults residing in a non-profit long-term care facility assessed functionality with the Katz Index of Independence in Activities of Daily Living. Vitamin D levels were classified as: deficient (< 20 ng/mL), insufficient (21-29 ng/mL), or normal (≥ 30 ng/mL). We used the chi-square test and Student's t-test to compare dichotomous and continuous variables, respectively. Analysis of variance with Tukey's post hoc test was used to assess differences between groups. RESULTS: The sample consisted of 63 individuals whose mean age was 81 (61-113) years: 36 (55.4%) women and 27 (44.6%) men. The mean vitamin D level was 18.6 ng/mL, being < 30 ng/mL in 84.1%. The level was normal in 10 (15.9%), insufficient in 17 (27%), and deficient in 36 (57.1%). Vitamin D deficiency was present in 76.5% of those with total functional dependence (Katz = 5-6). CONCLUSIONS: We observed a high frequency of hypovitaminosis D, especially vitamin D deficiency, which was very common among those with significant functional dependence.

OBJETIVOS: Avaliar a frequência de hipovitaminose D em idosos de uma instituição filantrópica de longa permanência e sua associação com grau de funcionalidade. METODOLOGIA: Estudo transversal, observacional e analítico de idosos de uma instituição filantrópica de longa permanência. A funcionalidade foi avaliada pela Escala de Katz. Os níveis de vitamina D foram classificados em: deficiência (valores menores que 20 ng/mL); insuficiência (valores entre 21 - 29 ng/mL) e normais (valores igual ou superior a 30 ng/mL). Empregamos teste qui-quadrado e t de student, para compararmos variáveis dicotômicas e contínuas, respectivamente; e análise de variância (ANOVA) com teste post hoc de Tukey, para avaliarmos as diferenças entre os grupos. RESULTADOS: Sessenta e três indivíduos foram analisados com média de idade de 81 anos (61 - 113), sendo 36 (55,4%) mulheres e 27 (44,6%) homens. A média de vitamina D foi 18,6 ng/mL, 84,1% com níveis menores que 30 ng/mL; dez apresentaram níveis normais (15,9%), 17 com insuficiência (27%) e 36 com deficiência (57,1%); ainda, 76,5% dos portadores de dependência funcional total (Katz = 5 - 6) apresentam deficiência de vitamina D. CONCLUSÕES: Observamos uma alta frequência de hipovitaminose D, especialmente deficiência, muito frequentes naqueles com dependência funcional importante

Evaluation of vitamin D and inflammatory markers in elderly

Abstract Vitamin D is an immune modulator, in addition to being interrelated with calcium homeostasis and bone metabolism. Recent studies have associated vitamin D with inflammatory processes. C-reactive protein (CRP), platelet/lymphocyte ratio (PLR) and neutrophil/lymphocyte ratio (NLR) have been used to determine inflammation. There is no consensus on the use of these markers to determine an association between inflammation and vitamin D levels. The objective of this study was to evaluate the association between inflammatory markers and vitamin D in the elderly. A cross-sectional, descriptive study was performed based on the analysis of vitamin D, CRP (quantitative determination of C-Reactive Protein by the ultra-sensitive method) and blood count of institutionalized elderly. In this study, 64% showed vitamin D deficiency, with mean value of 22 ng/mL. In the vitamin D deficient group, the mean values found were: CRP 4.5 mg/L; NLR 2.35 and PLR 119. In the group without vitamin D deficiency the mean values were: CRP 4 mg/L; NLR 1.87 and PLR 111 without statistical difference between the values of the analyzed parameters. The results point to a predominant profile of vitamin D deficiency in the evaluated individuals. No association was found between vitamin D values and the inflammatory markers analyzed.

Efecto de la suplementación con vitamina D en dosis única sobre el estado nutricional de vitamina D / Effect of vitamin D supplementation as a single dose on the nutritional status of vitamin D

INTRODUCCIÓN: El primer año de vida es un periodo de riesgo de deficiencia de vitamina D (VD). La administración de 400 UI diarias de VD no tiene una adherencia del 100%, en cambio dosis únicas de 100.000 UI de VD oral son seguras en recién nacidos. OBJETIVO: Comparar el efecto de la suplementación oral de VD en dosis única de 100.000 UI al mes de edad vs dosis diarias de 400 UI sobre las concentraciones séricas de VD, a los 6 meses de vida. SUJETOS Y MÉTODOS: Ensayo clínico aleatorizado, sin enmascaramiento. Se incluyeron 84 lactantes sanos de 1 mes de vida, asignados al azar al grupo de estudio (GE) que recibió una dosis única de VD de 100.000 UI oral o al grupo control (GC), que recibió dosis diarias de VD de 400 UI oral del 1er al 6to mes de vida. A los 6 meses de edad se determinó la concentración sérica de VD. RESULTADOS: 65 lactantes terminaron el estudio, 36 en GE y 29 en GC. No se encontró deficiencia de VD. La insuficiencia de VD fue de 5,5% y 6,8% en el GE y GC, respectivamente. La concentración sérica de VD a los 6 meses de vida, fue de 38,8 ± 5,2 ng/ml y 39,7 ± 6,3 ng/ml para GE y GC, respectivamente (NS). CONCLUSIONES: La suplementación con 100.000 UI de VD única al mes de edad logra concentraciones séricas de VD a los 6 meses de vida, similares a dosis diarias de 400 UI de VD, del 1er al 6to mes.

INTRODUCTION: Infants are a group at risk of vitamin D (VD) deficiency. The administration of 400 IU of VD per day during the first year of life does not achieve 100% adherence. A single dose of 100,000 IU of oral VD is safe in newborns. OBJECTIVE: To compare the effect of oral administration of VD between a single dose of 100,000 IU at one month of age vs daily doses of 400 IU on serum concentrations of VD, at 6 months of age. SUBJECTS AND METHOD: Randomized clinical trial, without masking. 84 healthy infants were included at 1 month of age, randomized to the study group (SG) receiving a single oral dose of 100,000 IU or to the control group (CG), who received daily oral doses of VD of 400 IU from the 1st to the 6th month of life. At 6 months of life, the serum concentration of VD was determined. RESULTS: 65 infants completed the study, 36 in SG and 29 in CG. No VD deficiency was found. VD insufficient was 5.5% and 6.8% in the SG and CG, respectively. The serum concentration of VD at six months of age was 38.8 ± 5.2 ng/ml and 39.7 ± 6.3 ng/ml for the SG and CG, respectively (NS). CONCLUSIONS: Supplementation of 100,000 IU of VD at one month age achieves serum concentrations of VD at 6 months of life similar to the administration of daily doses of 400 IU of VD from the 1st to the 6th month.

Niveles de vitamina D en médicos: ¿son los anestesiólogos el único grupo de riesgo? / Vitamin D levels among anesthesiologists and other physicians

Background Sun exposure is the main source of 25-hydroxy-vitamin D. Since anesthesiologists work inside operating rooms, they are identified as a deficiency risk group. As medical activity in general occurs indoors, added to the work excess and sedentary lifestyle, physicians in general have low sun exposure. Aim To investigate the determinants of vitamin D levels in physicians. Material and Methods Anesthesiologists and physicians not working in operating rooms were included. A survey that comprised working hours, diet, skin color, sunscreen use and outdoor activities was also applied. Measurements of vitamin D and parathormone levels in blood were performed. Results We analyzed samples from 81 volunteers. Median vitamin D values of the whole sample were in the range of insufficiency (25.3 [interquartile range 12.4] ng/ml). Multiple linear regression analysis detected no differences between anesthesiologists and non-anesthesiologists. A higher body mass index was a risk factor for vitamin D deficiency, (p = 0.025). The only protective factor was the intake of a vitamin D supplement (p < 0.01). Conclusions Anesthesiologists and other specialists were both at risk for vitamin D deficiency. Obesity was a risk factor and the use of a vitamin D supplement was the only protective factor.

Definição da deficiência de vitamina D em crianças em idade escolar: revisão sistemática com metanálise / Definition of vitamin d deficiency in schoolchildren: systematic review with meta-analysis

ABSTRACT BACKGROUND: Vitamin D deficiency is being recognized as a pandemic due to the volume of people affected by the deficiency and the number of illnesses generated or stimulated by the deficiency. There is a lack of consensus in the literature on what is considered vitamin D deficiency [25(OH)D]. OBJECTIVE: This review brings together the most common levels of 25(OH)D found in healthy schoolchildren and what is considered deficient. METHODS: This systematic review was based on the literature accessed from the electronic databases: MEDLINE, EMBASE, LILACS, SCOPUS and WEB OF SCIENCE. The following descriptors were used in English, Portuguese and Spanish: "Vitamin D"; "Vitamin D deficiency"; "Nutritional Supplements" as well as all their synonyms. The meta-analysis was performed considering the random model. Inclusion criteria: healthy children aged 6 to 12 years, studies that had vitamin D levels, defined vitamin D deficiency. RESULTS: Of the 191 potentially eligible articles, only six articles were included, with 2618 students in total. The mean value of 25(OH)D was estimated at 18.11 ng/mL with 95% confidence interval. Among the articles found, three were considered deficiency levels below 20 ng/mL, one considered below 18 ng/mL, another below 15 ng/mL, and the latter below 11 ng/ mL. The prevalence of vitamin D deficiency among the articles was 48.6%, 7%, 98%, 64.63%, 19.5%, 28.4%, according to each classification used by the same. CONCLUSION: The most common definition in the literature of 25(OH)D deficiency in schoolchildren was at levels below 20 ng/mL. No side effects have been reported in studies that used fortification and/or vitamin D supplementation. Daily supplementation is more effective than seasonal supplementation. However, more studies are needed to define what can be considered as optimal levels of 25(OH)D in children.

RESUMO CONTEXTO: A deficiência de vitamina D está sendo reconhecida como uma pandemia devido ao volume de pessoas afetadas pela deficiência e o número de doenças geradas ou estimuladas por tal deficiência. Há falta de consenso na literatura sobre o que é considerado deficiência de vitamina D [25(OH)D]. OBJETIVO: Esta revisão reúne os níveis mais comuns de 25(OH)D encontrados em escolares saudáveis e o que é considerado deficiência. MÉTODOS: Esta revisão sistemática foi baseada na literatura acessada a partir das bases de dados eletrônicas: MEDLINE, EMBASE, LILACS, SCOPUS e WEB OF SCIENCE. Foram utilizados os seguintes descritores em inglês, português e espanhol: "Vitamina D"; "Deficiência de vitamina D"; "Suplementos Nutricionais", bem como todos os seus sinônimos. A meta-análise foi realizada considerando o modelo aleatório. Critérios de inclusão: crianças saudáveis na faixa etária de 6 a 12 anos, estudos que tinham níveis de vitamina D, deficiência de vitamina D definida. RESULTADOS: Dos 191 artigos potencialmente elegíveis, apenas seis artigos foram incluídos, com 2618 escolares no total. O valor médio de 25(OH)D foi estimado em 18,11 ng/mL com 95% de intervalo de confiança. Dentre os artigos encontrados três consideraram deficiência níveis abaixo de 20 ng/mL, um considerou abaixo de 18 ng/mL, outro abaixo de 15 ng/mL, e o último abaixo de 11 ng/mL. A prevalência da deficiência de vitamina D entre os artigos foi de 48,6%, 7%, 98%, 64,63%, 19,5%, 28,4%, de acordo com cada classificação utilizada por eles. CONCLUSÃO: A definição mais comum na literatura de deficiência de 25(OH)D em escolares foi em níveis inferiores a 20 ng/mL. Nenhum efeito colateral foi relatado em estudos que usaram fortificação e/ou suplementação de vitamina D. A suplementação diária é mais eficaz do que a suplementação sazonal. No entanto, mais estudos são necessários para definir o que pode ser considerado como níveis ótimos de 25(OH)D em crianças.

The prevalence rate of vitamin D insufficiency in a random sample of individuals visiting the orthopedic unit in Al-Diwanyah Teaching Hospital, Iraq

Vitamin d deficiency state is a global public health issue that has been linked in addition to bone problems to a number of disordes affecting the cardiovascular syste, the development of neoplastic disords and autoimmune diseases. However, the prevalence rate of vitamin D deficiency in daily clinical practice in our province in the Mid-Euphrates region of Iraq is poorly defined. The current study was planned and conducted, taking into consideration the aim of estimating a hospital base prevalence rate of vitamin D and relate vitamin D insufficiency state to a number of demographic factors. The current crosssectionalk study was carried out in the orthopedic unit at Al-Diwaniyah Teaching Hospital, Mid Euphrates rgion, Iraq. The study included a random sample of 141 individuals from the pool of patientes daily visiting the orthopedic unit. The study started in January 2018 and ended on June 2019. Serum estimation of vitamin D was carried out to all particpants in addition to the inclusion of the fowling variables in the questionnaire form: age gender, residency, occupation, education level, and economic status. The results of the current study revealed that the serum level of vitamin D ranged from 4.80 to 70.00 ng/dl and it averaged 18.57±11.59 ng/dl; its median and inter-quartile range level was 15.83 (14.40) ng/dl. According to a cutoffvalue of < 20 ng/dl defining the vitamin D deficiency status according to some literature, the prevalence rate was 64.5%. Whereas, considering the cutoff value to be < 30 ng/dl, the prevalence rate of vitamin deficiency was 87.9%. Serum vitain D level was not significantly correlated to any of the demographic characteristics included in the study. In view of the available data from the current study and previous reports, vitamin D deficiency is a common health issue in daily clinical practice and strategies ust be adipted by our health institutes to overcome this health problem and associated disorders (AU)

Hipovitaminose D e índices glicêmicos em trabalhadores de turno alternante de empresa de mineração / Hypovitaminosis D and glycemic index in individuals working in rotate shifts of a mining company

Objetivo: Demonstrar a prevalência da hipovitaminose D em trabalhadores de turno de uma empresa de mineração e verificar se, nesta população, há correlação entre as variáveis glicêmicas (hemoglobina glicada e glicemia de jejum) e os níveis séricos de vitamina D. Métodos: Estudo transversal observacional realizado por 2 anos consecutivos com trabalhadores de turno. No primeiro ano, foram analisados os níveis séricos de vitamina D (25(OH)D) e glicemia de jejum, excluindo indivíduos que realizavam tratamento para controle glicêmico, suplementação de vitamina D e/ou participantes do sexo feminino, totalizando 548 trabalhadores. No ano seguinte, foram selecionados da amostra anterior apenas os indivíduos que apresentaram hipovitaminose D (25(OH) D<30ng/mL). Nestes, foram analisados os níveis de 25(OH)D, glicemia de jejum e hemoglobina glicada. Foram aplicados o teste de normalidade Kolmogorov-Smirnov e a correlação de Spearman. Resultados: A idade média dos participantes foi de 38,2 anos. No primeiro ano, 80,8% dos trabalhadores apresentaram hipovitaminose D e 10,8% apresentavam glicemia de jejum fora dos níveis de normalidade. Dentre a amostra do ano seguinte, 81,1% permaneceram com hipovitaminose D, 18,2% apresentaram glicemia de jejum fora dos níveis de normalidade e 15,8% apresentaramhemoglobina glicada alterada. Não foram encontradas correlações significativas entre a 25(OH)D e a glicemia de jejum e hemoglobina glicada. Conclusão: Foi observada alta prevalência de hipovitaminose nos trabalhadores de turno. Diferentemente de outros estudos, não foram encontradas correlações significativas entre as variáveis glicêmicas e a concentração sérica da vitamina D. (AU)

Objective: To demonstrate the prevalence of hypovitaminosis D in shift workers of a mining company, and to check whether, in this population, there is a correlation between glycemic variables (glycosylated hemoglobin and fasting plasma glucose)- and serum levels of vitamin D. Methods: These are cross-sectional observational studies performed in two consecutive years with shift workers. In the first year, the serum levels of vitamin D (25(OH)D) and fasting plasma glucose were analyzed, with people who underwent treatment for glycemic control, vitamin D supplementation, and/or female participants being excluded, totalizing 548 workers. In the following year, only those individuals who presented hypovitaminosis D (25 (OH) D <30 ng/dL) were selected from the previous sample. The levels of 25 (OH) D, fasting plasma glucose, and HbA1C of these individuals were analyzed. The Kolmorogov-Smirnov normality test and the Spearman correlation were applied. Results: Th e m ean a ge o f participants was 38.2 years. In the first year, 80.8% (n=442) of the workers presented hypovitaminosis D, and 10.8% had fasting plasma glucose out of normal levels. Among the sample of the following year, 81.1% remained with hypovitaminosis D, 18.2% (n=51) had fasting glycemia out of normal levels, and 15.8% (n=44) had altered glycosylated hemoglobin. Conclusion: A high prevalence of hypovitaminosis in shift workers was observed. Differently from other studies, no significant correlations were found between glycemic variables and serum vitamin D concentration. (AU)

Vitamina D y enfermedades respiratorias pediátricas / Vitamin D and pediatrics respiratory diseases

Resumen: El mejor entendimiento sobre la actividad global de la vitamina D, ha llevado a una intensa búsque da de sus implicancias en enfermedades no esqueléticas. En este artículo se presenta una revisión actualizada de la relación entre la vitamina D y la patología respiratoria pediátrica. Se realizó una búsqueda bibliográfica en PUBMED utilizando términos libres y MESH: vitamina D, enfermedades del sistema respiratorio, asma, bronquiolitis. Se seleccionó estudios en humanos menores de 18 años y animales, publicados en inglés y español hasta el 2017. Se encontraron 507 artículos, de los cuales se incluyeron 43. Evidencia indirecta apunta hacia un rol de la vitamina D y la maduración pulmonar fetal. En relación a la patología pulmonar pediátrica, los estudios son escasos y poco concluyentes. Nuevos meta - análisis, con evaluación individualizada de los participantes, muestran un importante rol protector de la suplementación en la prevención de exacerbaciones asmáticas severas e infecciones virales agudas. En bronquiolitis los resultados son contradictorios, sin relación clara entre niveles plasmáticos y severidad. No existe suficiente evidencia que evalué los beneficios en fibrosis quística y tuberculosis. Recientemente se ha propuesto una relación directa entre la severidad de los trastornos respiratorios del sueño y los niveles plasmáticos de vitamina D, aunque se desconoce los mecanismos exactos involucrados a esta asociación. La información actual permite suponer que la suplementación de vitamina D puede representar una estrategia costo - efectiva en la reducción de importantes causas de morbimortalidad infantil.

Abstract: The better understanding of the global activity of vitamin D has led to an intense search for its involvement in non-skeletal diseases. This article presents an updated review of the relationship between vitamin D and pediatric respiratory pathology. A literature search was performed in PUBMED using free terms and MESH terms: vitamin D, asthma, respiratory system diseases, and bronchiolitis. Stu dies in human patients younger than 18 years and animals, published in English and Spanish until 2017 were included. 507 articles were found, of which 43 were included. Indirect evidence suggests a role of vitamin D and fetal lung maturation. In relation to pediatric pulmonary pathology, studies are scarce and inconclusive. Recent meta-analyses performed with individualized evaluation of the participants shows an important protective role of vitamin D supplementation in the prevention of severe asthma exacerbations and acute viral infections. In bronchiolitis, the results are contradictory, with no clear relationship between plasma levels and severity. There is not enough evidence to assess the benefits of vitamin D supplementation in cystic fibrosis and tuberculosis. A direct relationship between the severity of sleep-related breathing disorders and vitamin D plasma levels has recently been proposed, although the exact mechanisms involved in this association are unknown. Current information suggests that vitamin D supplementation may represent a cost-effective strategy in redu cing important causes of infant morbidity and mortality.

Comparison of 1α-25-dihydroxyvitamin D3 and IgE Levels between Allergic Rhinitis Patients and Healthy People

Abstract Introduction Allergic rhinitis is one of the most common allergic diseases that cause a decrease in quality of life. Over the last decades, the increase in the number of cases is supposed to be a result of industrialization and lifestyle changes. Vitamin D, which is a steroid hormone, has a significant immunomodulatory and antioxidant role in the human body. Objective The objective of the present study is to investigate the role of 1α-25-dihydroxyvitamin D3 levels in allergic rhinitis patients and to compare them to the levels found in the healthy population. Methods A total of 256 participants were included in the present study. Allergic rhinitis is diagnosed with the help of the Allergic Rhinitis and Its Impact on Asthma (ARIA) guidelines confirmed through skin prick tests. Control subjects were selected among people without allergy history, which was also confirmed through skin prick tests. The levels of 1α-25-dihydroxyvitamin D3, immunoglobulin E (IgE), and eosinophil counts were measured in blood samples from both groups. Results The mean value of serum levels of 1α-25-hydroxyvitamin D3 was 25.5 ± 3.74 in the allergic rhinitis group, and 31.58 ± 3.85 in the control subjects. This difference reveals statistically-decreased levels in the allergic rhinitis group (p< 0.05). The total IgE levels are increased in the allergic rhinitis group (p< 0.05) and negatively correlated with the serum levels of 1α-25-hydroxyvitamin D3 (r = - 0.259, p< 0.05). Conclusion Lower serum levels of 1α-25-hydroxyvitamin D3 were detected in the allergic rhinitis population. This data is also correlated to the IgE response in the study group. A supplement of 1α-25-hydroxyvitamin D3 in deficient patients might be helpful to relieve symptoms and signs of allergic rhinitis, but further studies are needed.

Influencia de la estación del año en los niveles de vitamina D de una población pediátrica / Influence of the season of the year in vitamin D levels in a pediatric population

Introducción: El objetivo de nuestro trabajo es determinar los niveles séricos de 25 (OH) vitamina D en una población pediátrica de la Ciudad de Rosario y sus alrededores y la influencia de las diferentes estaciones del año sobrelos mismos.Material y métodos: Estudio prospectivo observacional en el que se dosó el nivel de vitamina D en niños de ambossexos menores de 15 años de edad. El plazo de medición fue de un año calendario para posteriormente y analizarsus niveles según las cuatro estaciones del año. Todos los análisis de vitamina D fueron realizados por el mismolaboratorio y el mismo equipo de medición.Resultados: Se incluyeron 128 pacientes de ambos sexos. Del total de mediciones se encontraron niveles inferioresa 30 ng/ml en el 61,7% (n=79). Las medias de los niveles de Vitamina D fueron en otoño 32,6 ng/ml (±12,3);invierno 24,4 ng/ml (±8,7); primavera 24,1 ng/ml (±7,2) y en verano 27,8 ng/ml (±10,8). Existieron diferenciassignificativas entre las estaciones de otoño y primavera (p< 0,001) y entre otoño e invierno (p<0,004). Otoño fue laúnica estación que presentó niveles superiores a 30 ng/ml (media: 32,6).Conclusiones: Existe una alta prevalencia de niveles bajos de vitamina D (según lo publicado en la literatura a nivelinternacional). Recomendamos su dosaje especialmente en las estaciones de invierno, primavera y verano (AU)

Introduction: The purpose of our work is to determine the serum levels of 25 (OH) vitamin D in a pediatric populationof the City of Rosario and surrounding areas, and the influence of the different seasons of the year on them.Material and methods: A prospective observational study in which the level of vitamin D was measured in children ofboth sexes under 15 years of age. The measurement period was one calendar year to be subsequently analyzed accordingto the four seasons of the year. All vitamin D tests were performed by the same laboratory and the same measurementequipment. Results: 128 patients of both sexes were included. Of the total measurements, levels lower than 30 ng / ml were found in61.7% (n = 79). The averages of Vitamin D levels were: in autumn 32.6 ng / ml (±12,3); winter 24.4 ng / ml (±8,7);spring 24.1 ng / ml (±7,2) and summer 27.8 ng / ml (±10,8). There were significant differences between the autumn andspring seasons (p <0.001) and between autumn and winter (p <0.004). Autumn was the only station that presented levelshigher than 30 ng / ml (mean: 32.6).Conclusions: There is a high prevalence of low levels of vitamin D (as published in the international literature). We recommend its dosing especially in the winter, spring and summer seasons (AU)

Do infants with cow's milk protein allergy have inadequate levels of vitamin D? / Lactentes com alergia à proteína do leite de vaca apresentam níveis inadequados de vitamina D?

Abstract Objective: To verify whether infants with cow's milk protein allergy have inadequate vitamin D levels. Methods: This cross-sectional study included 120 children aged 2 years or younger, one group with cow's milk protein allergy and a control group. The children were recruited at the pediatric gastroenterology, allergology, and pediatric outpatient clinics of a university hospital in the Northeast of Brazil. A questionnaire was administered to the caregiver and blood samples were collected for vitamin D quantification. Vitamin D levels <30 ng/mL were considered inadequate. Vitamin D level was expressed as mean and standard deviation, and the frequency of the degrees of sufficiency and other variables, as proportions. Results: Infants with cow's milk protein allergy had lower mean vitamin D levels (30.93 vs.35.29 ng/mL; p = 0.041) and higher deficiency frequency (20.3% vs.8.2; p = 0.049) than the healthy controls. Exclusively or predominantly breastfed infants with cow's milk protein allergy had higher frequency of inadequate vitamin D levels (p = 0.002). Regardless of sun exposure time, the groups had similar frequencies of inadequate vitamin D levels (p = 0.972). Conclusions: Lower vitamin D levels were found in infants with CMPA, especially those who were exclusively or predominantly breastfed, making these infants a possible risk group for vitamin D deficiency.

Resumo Objetivo: Verificar se lactentes com alergia à proteína do leite de vaca (APLV) apresentam níveis inadequados de vitamina D. Métodos: Estudo transversal, envolveu 120 crianças de até dois anos, um grupo com APLV e outro de comparação, captadas dos ambulatórios de Gastroenterologia Pediátrica, Alergologia Pediátrica e Puericultura de um hospital universitário, no Nordeste brasileiro. Foi aplicado um formulário e foram coletadas amostras sanguíneas para a análise da vitamina D, foram considerados inadequados os níveis < 30 ng/mL. Níveis de vitamina D foram expressos em média e desvio padrão e a frequência dos graus de suficiência e demais variáveis, em proporções. Resultados: Lactentes com APLV, quando comparados com os saudáveis, apresentaram uma menor média do nível da vitamina D (30,93 vs. 35,29 ng/mL) (p = 0,041) e maior frequência de deficiência (20,3% vs. 8,2) (p = 0,049). Maior frequência de níveis inadequados de vitamina D foi observada nas crianças com APLV que estavam em aleitamento materno exclusivo/predominante (p = 0,002). Independentemente do período de exposição solar, a frequência de um status inadequado de vitamina D foi semelhante entre os grupos (p = 0,972). Conclusões: Menores níveis de vitamina D foram observados em lactentes com APLV, especialmente naqueles em aleitamento materno exclusivo/predominante, que configura esse como um possível grupo de risco para essa deficiência.

Hypovitaminosis D in patients undergoing kidney transplant: the importance of sunlight exposure

OBJECTIVES: Recent studies have shown a high prevalence of hypovitaminosis D, defined as a serum 25-hydroxyvitamin D level less than 30 ng/ml, in both healthy populations and patients with chronic kidney disease. Patients undergoing kidney transplant are at an increased risk of skin cancer and are advised to avoid sunlight exposure. Therefore, these patients might share two major risk factors for hypovitaminosis D: chronic kidney disease and low sunlight exposure. This paper describes the prevalence and clinical characteristics of hypovitaminosis D among patients undergoing kidney transplant. METHODS: We evaluated 25-hydroxyvitamin D serum levels in a representative sample of patients undergoing kidney transplant. We sought to determine the prevalence of hypovitaminosis D, compare these patients with a control group, and identify factors associated with hypovitaminosis D (e.g., sunlight exposure and dietary habits). RESULTS: Hypovitaminosis D was found in 79% of patients undergoing kidney transplant, and the major associated factor was low sunlight exposure. These patients had higher creatinine and intact parathyroid hormone serum levels, with 25-hydroxyvitamin D being inversely correlated with intact parathyroid hormone serum levels. Compared with the control group, patients undergoing kidney transplant presented a higher prevalence of 25-hydroxyvitamin D deficiency and lower serum calcium, phosphate and albumin but higher creatinine and intact parathyroid hormone levels. CONCLUSIONS: Our results confirmed the high prevalence of hypovitaminosis D in patients undergoing kidney transplant. Therapeutic strategies such as moderate sunlight exposure and vitamin D supplementation should be seriously considered for this population.

Consulta ginecológica de rotina: quais exames solicitar? / Routine gynecological appointments: which exams apply?

Atualmente é crescente o número de mulheres atingidas por doenças como Hipertensão Arterial Sistêmica (HAS), Diabetes, Osteoporose e mesmo cânceres, como os de mama e cólon. O médico ginecologista, muitas vezes, é a única referência de saúde destas pacientes. Este artigo visa reunir as recomendações das principais Sociedades Médicas no que diz respeito ao rastreio das comorbidades citadas e os demais cuidados básicos de saúde da mulher. Ele objetiva, portanto, facilitar e ampliar a abordagem prática do ginecologista no consultório para que a mulher seja avaliada de uma maneira mais completa.(AU)

The number of women suffering from diseases such as Systemic Arterial Hypertension, Diabetes, Osteoporosis and breast and colon cancers has grown in the latest decades. The gynecologist is oftenly the only reference in medical care for these women. This article groups the main recommendations from different Medical Societies regarding the tracking of these conditions and other basic aspects on women's health care. It aims to facilitate and broaden the gynecologists' practical approach in evaluating women in a more complete way.(AU)

Hypovitaminosis D in Children with Hashimoto’s Thyroiditis / Hipovitaminosis D en niños con tiroiditis de Hashimoto

Background: Vitamin D deficiency or insufficiency may play a role in the pathogenesis of certain autoimmune diseases. Aim: To measure vitamin D levels in children with Hashimoto’s thyroiditis (HT) (either with subclinical or marked hypothyroidism) and in healthy controls. Material and Methods: We included 68 children with HT aged 12 ± 4 years (39 females) from a pediatric outpatient clinic and 68 healthy children aged 10 ± 4 years (37 females). Calcium metabolism parameters, thyroid function tests and anti-thyroid peroxidase (anti-TPO), anti-thyroglobulin (anti-TG) and 25 hydroxy vitamin D (25OHD) levels were measured. Results: Patients were older than controls but well matched by gender distribution. Mean 25OHD levels were significantly lower in HT patients than controls (16.8 ± 9.3 and 24.1 ± 9.4 ng/mL respectively, P < 0.01). Frequency of vitamin D deficiency was 76 and 35% in HT patients and controls, respectively (P < 0.001). Conclusions: Vitamin D deficiency is more common in children with HT than healthy controls.

Antecedentes: La deficiencia o insuficiencia de vitamina D puede tener un rol en la patogenia de enfermedades autoinmunes. Objetivo: Medir niveles de vitamina D en niños con tiroiditis de Hashimoto (TH) (con hipotiroidismo subclínico o marcado) y en controles sanos. Material y Métodos: Estudiamos 68 niños con TH, de 12 ± 4 años (39 mujeres) y 68 controles sanos de 10 ± 4 años (37 mujeres). Se les midió parámetros de metabolismo de calcio, pruebas de función tiroidea, anticuerpos anti peroxidasa y anti tiroglobulina y 25 hidroxi vitamina D (25 OH vit D). Resultados: Los pacientes eran mayores que los controles pero la distribución por género era homogénea en ambos grupos. Los niveles de 25 OH vit D en pacientes y controles fueron 16,8 ± 9,3 y 24,1 ± 9,4 ng/mL respectivamente, p < 0,01. La frecuencia de deficiencia de vitamina D fue de 76 y 35% en pacientes y controles, respectivamente. Conclusiones: La deficiencia de vitamina D es más común en niños con TH.

Vitamin D Repletion in Korean Postmenopausal Women with Osteoporosis

PURPOSE: Up to 71% of South Korean postmenopausal women have vitamin D deficiency {serum 25-hydroxyvitamin D [25(OH) D] level <50 nmol/L}. Data on vitamin D supplementation was collected during the screening phase of an efficacy/safety study of denosumab in Korean postmenopausal women with osteoporosis. This report describes the effect of vitamin D supplementation on repletion to 25(OH)D levels ≥50 nmol/L in Korean postmenopausal women with osteoporosis. MATERIALS AND METHODS: Vitamin D levels of Korean postmenopausal women (60-90 years old) were measured by extracting 25(OH)D2 and 25(OH)D3 from serum samples via protein precipitation and using liquid chromatography with tandem mass spectrometry detection. Calibration curves were constructed from the mass chromatograms to obtain total vitamin D levels. Subjects with serum 25(OH)D levels <50 nmol/L were supplemented with 1000 IU of vitamin D tablets during the 2.5-month-long screening period. Dose, frequency, and duration were determined by the investigator. If repletion was achieved (≥50 nmol/L) on retest, subjects were eligible to be rescreened for study entry. RESULTS: Of 371 subjects screened, 191 (52%) required vitamin D supplementation, and 88% (168 of 191) were successfully repleted. More than half of the subjects (58%) who were successfully repleted received doses of 2000 IU daily. The mean time to successful repletion was 31 days (standard deviation 8.4 days; range 11-48 days). CONCLUSION: Supplementation with daily median doses of 2000 IU vitamin D successfully repleted 88% of Korean postmenopausal women with osteoporosis within 48 days to a serum vitamin D level of 50 nmol/L.

Interaction of Vitamin D and Smoking on Inflammatory Markers in the Urban Elderly / 예방의학회지

OBJECTIVES: Epidemiological studies have reported that vitamin D deficiency is associated with inflammatory disease. Smoking is a well-known risk factor for inflammation. However, few studies have investigated the interactive effect of vitamin D deficiency and smoking on inflammation. This study aims to investigate the interaction of vitamin D and smoking with inflammatory markers in the urban elderly. METHODS: We used data from the Korean Elderly Environmental Panel Study, which began in August 2008 and ended in August 2010, and included 560 Koreans > or =60 years old living in Seoul. Data was collected via questionnaires that included items about smoking status at the first visit. Vitamin D levels, high-sensitivity C-reactive protein (hs-CRP), and white blood cell (WBC) counts were repeatedly measured up to three times. RESULTS: The association of vitamin D and hs-CRP was significant after adjusting for known confounders (beta=-0.080, p=0.041). After separate analysis by smoking status, the association of vitamin D deficiency and hs-CRP in smokers was stronger than that in nonsmokers (smokers: beta=-0.375, p=0.013; non-smokers: beta=-0.060, p=0.150). Smoking status was an effect modifier that changed the association between vitamin D deficiency and hs-CRP (interaction estimate: beta=-0.254, p=0.032). Vitamin D was not significantly associated with WBC count (beta=0.003, p=0.805). CONCLUSIONS: Vitamin D deficiency was associated with hs-CRP in the urban elderly. Smoking status was an effect modifier of this association. Vitamin D deficiency was not significantly associated with WBC count.