La dieta como factor de riesgo de hipovitaminosis D en la población pediátrica española / Diet as a risk factor for hypovitaminosis D in the Spanish pediatric population

Objetivo: El papel de la dieta como determinante relevante de hipovitaminosis D no está claro. El objetivo del estudio fue analizar su impacto en la prevalencia de hipovitaminosis D en población infantil sana española. Métodos: Mediante un diseño observacional se estudiaron en una muestra de población pediátrica, entre 4 y 14 años, datos demográficos, antropométricos, nutricionales, analíticos y el nivel de 25(OH) D mediante enzimo-inmuno-análisis. Se obtuvieron encuestas dietéticas mediante recordatorio de 24 horas evaluadas mediante el programa informático DietSource 3.0. La probabilidad de hipovitaminosis se analizó mediante regresión logística. Resultados: Se reclutaron 281 niños sanos con una edad media 9,0 años. La prevalencia de hipovitaminosis D (<20 ng/ml) fue de un 18,15% y la de déficit grave (<10 ng/ml) del 1,4%. La etnia, la estacionalidad, el fototipo de piel y el tiempo de exposición solar se asociaron significativamente a la presencia de hipovitaminosis D. La distribución de nutrientes no mostró diferencias entre los grupos con y sin hipovitaminosis salvo en la Piridoxina (vitamina B6) y los ácidos grasos saturados. Conclusiones: La dieta juega un papel reducido como factor de riesgo de hipovitaminosis D en población infantil sana y los factores relevantes son los relacionados con la exposición al sol. Un adecuado estilo de vida al aire libre, exposición solar libre de protectores solares y patrones dietéticos que aseguren una ingesta correcta de vitamina D y calcio siguen siendo las recomendaciones idóneas para la población general. La utilización de suplementos se debe limitar a los grupos de riesgo. (AU)

Objetives: It is not clear whether diet in the Spanish general population is also a relevant determinant of hypovitaminosis D. The objective of the study was to analyze the impact of diet on the prevalence of hypovitaminosis D in healthy children. Methods: Demographic, anthropometric, nutritional, analytical data and vitamin D (25 (OH) D) level were studied using an enzyme-immuno-analysis using an observational design in a sample of the pediatric population between 4 and 14 years old. The 24-hour reminder diet survey was evaluated with the DietSource 3.0 software. The probability of hypovitaminosis was analyzed using logistic regression. Results: 280 healthy children with a mean age of 9.0 years were recruited. The prevalence of hypovitaminosis D (<20 ng/ml) was 18.15% and that of severe deficit (<10 ng/ml) 1.4%. Ethnicity, seasonality, skin phototype, and time of sun exposure were significantly associated with the presence of hypovitaminosis D. The distribution of nutrients did not show differences between the groups with and without hypovitaminosis except for Pyridoxine B6 and saturated fatty acids. Conclusions: Diet plays a reduced role as a risk factor for hypovitaminosis D in healthy children and the relevant factors are those related to sun exposure. An adequate outdoor lifestyle, sun exposure free of sunscreens and dietary patterns that ensure a correct intake of vitamin D and calcium remain the ideal recommendations for the general population. Supplementation should be limited to risk groups. (AU)

Fatty liver index as a predictor for type 2 diabetes in subjects with normoglycemia in a nationwide cohort study.

Our aim was to evaluate whether fatty liver index (FLI) is associated with the risk of type 2 diabetes (T2DM) development within the Spanish adult population and according to their prediabetes status; additionally, to examine its incremental predictive value regarding traditional risk factors. A total of 2260 subjects (Prediabetes: 641 subjects, normoglycemia: 1619 subjects) from the Di@bet.es cohort study were studied. Socio-demographic, anthropometric, clinical data and survey on habits were recorded. An oral glucose tolerance test was performed and fasting determinations of glucose, lipids and insulin were made. FLI was calculated and classified into three categories: Low (< 30), intermediate (30-60) and high (> 60). In total, 143 people developed diabetes at follow-up. The presence of a high FLI category was in all cases a significant independent risk factor for the development of diabetes. The inclusion of FLI categories in prediction models based on different conventional T2DM risk factors significantly increase the prediction power of the models when all the population was considered. According to our results, FLI might be considered an early indicator of T2DM development even under normoglycemic condition. The data also suggest that FLI could provide additional information for the prediction of T2DM in models based on conventional risk factors.

Assessment of physical functioning in patients with chronic obstructive pulmonary disease (COPD) requiring long-acting dual bronchodilation in routine clinical practice.

OBJECTIVE: We aim to determine the effect of a fixed-dose combination (FDC) of tiotropium/olodaterol on Physical activity (PA) in patients with chronic obstructive pulmonary disease (COPD) in a real world setting. METHODS: COPD patients were prospectively enrolled to evaluate the effect of a FDC of tiotropium/olodaterol inhaler therapy via the Respimat® Soft Mist™ inhaler (SMI) on the physical functioning scale (PF-10), and the general condition of the patient as assessed by the physician (Physician's Global Evaluation, PGE), and the patient's satisfaction after 6 weeks of treatment. The primary end-point was the percentage of patients with therapeutic success at 6th week follow-up, defined as a ≥10-points increase in the standardised PF-10 score from baseline. RESULTS: A total of 257 patients from 57 sites were enrolled, and 234 completed the follow up. After 6 weeks of treatment, 155 out of 234 patients (66.2%) showed therapeutic success in the physical functioning score, coupled with significant improvement in PGE score: 78 (33.3%) patients with good/excellent PGE score at baseline, increasing to 172 (73.5%) at 6th week (p<0.0001). The patient's satisfaction was excellent: 77.2% reporting to be satisfied/very satisfied with the treatment, 79.9% with inhaling and 79.0% with the handling of SMI device. 1.6% of patients reported an investigator-defined drug-related adverse event. CONCLUSION: Treatment of COPD patients with a FDC of tiotropium/olodaterol SMI for 6 weeks resulted in significant improvements in the patients' condition as assessed by patients and physicians, with no new safety findings.

Electroactive biomaterial surface engineering effects on muscle cells differentiation.

Even though skeletal muscle cells can naturally regenerate as a response to insignificant tissue damages, more severe injuries can cause irreversible loss of muscle cells mass and/or function. Until now, cell therapies are not a good approach to treat those injuries. Biomaterials such as poly(vinylidene fluoride), PVDF, can improve muscle regeneration by presenting physical cues to muscle cells that mimic the natural regeneration environment. In this way, the ferroelectric and piezoelectric properties of PVDF offer new opportunities for skeletal muscle tissue engineering once the piezoelectricity is an electromechanical effect that can be used to provide electrical signals to the cells, upon mechanical solicitations, similar to the ones found in several body tissues. Thus, previous to dynamic experiments, it is important to determine how the surface properties of the material, both in terms of the poling state (positive or negative net surface charge) and of the morphology (films or fibers) influence myoblast differentiation. It was observed that PVDF promotes myogenic differentiation of C2C12 cells as evidenced by quantitative analysis of myotube fusion, maturation index, length, diameter and number. Charged surfaces improve the fusion of muscle cells into differentiated myotubes, as demonstrated by fusion and maturation index values higher than the control samples. Finally, the use of random and oriented ß-PVDF electrospun fibers scaffolds has revealed differences in cell morphology. Contrary to the randomly oriented fibers, oriented PVDF electrospun fibers have promoted the alignment of the cells. It is thus demonstrated that the use of this electroactive polymer represents a suitable approach for the development of electroactive microenvironments for effective muscle tissue engineering.

A unified description of the double perovskite family Sr2MWO6 within a rigid ion model.

The sequence of phase transitions and structural instabilities of the Sr2MWO6 double perovskites are investigated using a rigid ion model. The parametrization of the short range empirical potential allows the control of the cation sizes by means of independent parameters, and in particular, the effective size of the M cation can be tuned to reproduce the behaviour of the whole family. The coupling of symmetry modes and its role in the stability of the phases are discussed, and molecular dynamics simulations are carried out to determine structural phase transitions as a function of temperature. A satisfactory agreement between experiments and ab initio calculations is obtained for the relevant range of ionic radii and temperatures, indicating that the range of stability of the structures is mainly governed by steric effects.

Multiple soft-mode vibrations of lead zirconate.

Polarized Raman, IR, and time-domain THz spectroscopy of orthorhombic lead zirconate single crystals have yielded a comprehensive picture of temperature-dependent quasiharmonic frequencies of its low-frequency phonon modes. It is argued that these modes primarily involve vibrations of Pb ions and librations of oxygen octahedra. Their relation to phonon modes of the parent cubic phase is proposed. Counts of the observed IR and Raman active modes belonging to distinct irreducible representations agree quite well with group-theory predictions. Analysis of the results yields insight into the phase transition mechanism, involving a soft ferroelectric branch coupled by a trilinear term to another two oxygen octahedra tilt modes.

Asistencia al niño y adolescente con diabetes. Unidades de referencia en diabetes pediátrica / Treatment of the child and adolescent with type i diabetes: special paediatric diabetes units

El tratamiento intensivo de la diabetes mellitus tipo 1 (DM1) permite retrasar y enlentecer la progresión de las complicaciones crónicas (DCCT 1993). Este tipo de tratamiento en niños y adolescentes con DM1 tiene una complejidad diferente de la de otras etapas de la vida y por ello se necesitan Unidades de Asistencia Especializada en diabetes pediátrica. Se valoran los diferentes documentos y declaraciones sobre los derechos de los pacientes con DM1 y se enfatiza la necesidad de una adecuada asistencia sanitaria. En la última década, se han desarrollado en Europa varios proyectos para establecer una evaluación comparativa del tratamiento de la DM en edad pediátrica con el objetivo de establecer centros hospitalarios con una asistencia muy cualificada en su control. El Grupo de trabajo de Diabetes de la Sociedad Española de Endocrinología Pediátrica ha elaborado este documento con el objetivo de obtener un Consenso Nacional para la asistencia al niño y adolescente con DM1 en «Unidades de Referencia en diabetes pediátrica» y, a su vez, poder asesorar a las administraciones para establecer una Red Nacional dirigida a la asistencia del niño y adolescente con DM y organizar las Unidades de Atención Integral de la diabetes pediátrica en hospitales con nivel de referencia por su calidad asistencial (AU)

Intensive treatment of type 1 diabetes mellitus (DM1) delays and slows down the progression of chronic diabetes complications (DCCT 1993). This type of treatment in children and adolescents with DM1 has a different complexity to other stages of life and therefore, needs specialized care units. Various documents and declarations of diabetic patient's rights are evaluated, and the need for an adequate health care is emphasized. In the last decade, several projects have been developed in Europe to create a benchmark treatment of pediatric diabetes, with the aim of establishing hospitals with highly qualified healthcare to control it. The Diabetes Working Group of the Spanish Society for Pediatric Endocrinology (SEEP) has prepared this document in order to obtain a national consensus for the care of children and adolescents with type 1 diabetes in specialist Pediatric Diabetes Units, and at the same time advise Health Care Administrators to establish a national healthcare network for children and adolescents with diabetes mellitus, and organize comprehensive pediatric diabetes care units in hospitals with a reference level in quality of care (AU)

[Treatment of the child and adolescent with type 1 diabetes: special paediatric diabetes units]. / Asistencia al niño y adolescente con diabetes. Unidades de referencia en diabetes pediátrica.

Intensive treatment of type 1 diabetes mellitus (DM1) delays and slows down the progression of chronic diabetes complications (DCCT 1993). This type of treatment in children and adolescents with DM1 has a different complexity to other stages of life and therefore, needs specialized care units. Various documents and declarations of diabetic patient's rights are evaluated, and the need for an adequate health care is emphasized. In the last decade, several projects have been developed in Europe to create a benchmark treatment of pediatric diabetes, with the aim of establishing hospitals with highly qualified healthcare to control it. The Diabetes Working Group of the Spanish Society for Pediatric Endocrinology (SEEP) has prepared this document in order to obtain a national consensus for the care of children and adolescents with type 1 diabetes in specialist Pediatric Diabetes Units, and at the same time advise Health Care Administrators to establish a national healthcare network for children and adolescents with diabetes mellitus, and organize comprehensive pediatric diabetes care units in hospitals with a reference level in quality of care.

Documento consenso del Grupo de Diabetes de la SEEP: Programa de formación para la implantación del tratamiento con infusión subcutánea continua de insulina (ISCI) en pacientes pediátricos con diabetes tipo 1 / Consensus document of the Diabetes Group of the Spanish Society of Pediatric Endocrinology (SEEP): A training program to carry out treatment with continuous subcutaneous insulin infusion (CSII) in pediatric patients with type 1 diabetes

Los avances tecnológicos en los últimos años en el campo de la diabetes han permitido la aplicación de nuevas terapias para nuestros pacientes con el objetivo fundamental de mejorar su control metabólico, la calidad de vida y evitar las hipoglucemias. Esto obliga a establecer protocolos de consenso en el empleo de estas nuevas tecnologías para ser utilizadas por los distintos profesionales implicados en esta enfermedad. Este programa de formación incluye los conocimientos básicos y avanzados, para la utilización de la ISCI (AU)

Recently new technologies for the management of diabetes allow new therapeutic strategies for diabetes patients with the object of improve metabolic control, queality of life and avoid hypoglycaemias. Because physicians must be familiar with new diabetic are devices, new protocols must be establish. This article reports on the Spanish Position Statement for the Diabetes Pediatric Group for the Spanish Pediatric Endocrinology Society (SEEP) on educational program for the treatment of children and adolescent with type 1 diabetes with continuous subcutaneous insulin infusion (AU)

Estado actual y recomendaciones sobre la utilización de los sistemas de monitorización continua de glucosa en niños y adolescentes con diabetes mellitus tipo 1 / Current status and recommendations on the use of continuous blood glucose monitoring systems in children and adolescents with type 1 diabetes mellitus

Los métodos de medición de la glucemia han presentado un gran avance en la última década con la aparición de los sistemas de monitorización continua de la glucosa (SMCG) que miden los niveles de glucosa en el líquido intersticial y ofrecen información sobre patrones y tendencias de los niveles de la glucemia pero no sustituyen el autocontrol de la glucemia capilar. La mejoría del control de la diabetes utilizando los SMCG depende de la motivación y formación recibida por el paciente y familia, así como de la continuidad en su uso. Debido al gran desarrollo y la amplia utilización en la práctica clínica de estos sistemas, el grupo de diabetes de la Sociedad Española de Endocrinología Pediátrica ha elaborado un documento de consenso para su indicación y uso en la edad pediátrica. Existe un número limitado de ensayos clínicos en población pediátrica sobre el uso de esta tecnología. Se necesitan más datos para poder valorar su impacto sobre el control metabólico (AU)

Glucose monitoring methods have made great advances in the last decade with the appearance of the continuous glucose monitoring systems (CGMS) that measure the glucose levels in the interstitial liquid, providing information about glucose patterns and trends, but do not replace the self-monitoring of capillary glucose. Improvement in diabetes control using the CGMS depends on the motivation and training received by the patient and family and on the continuity in its use. Due to the development and widespread use of these systems in clinical practice, the diabetes group of the Sociedad Española de Endocrinología Pediátrica has drafted a document of consensus for their indication and use in children and adolescents. Only a limited number of trials have been performed in children and adolescent populations. More data are needed on the use of this technology in order to define the impact on metabolic control (AU)

[Current status and recommendations on the use of continuous blood glucose monitoring systems in children and adolescents with type 1 diabetes mellitus]. / Estado actual y recomendaciones sobre la utilización de los sistemas de monitorización continua de glucosa en niños y adolescentes con diabetes mellitus tipo 1.

Glucose monitoring methods have made great advances in the last decade with the appearance of the continuous glucose monitoring systems (CGMS) that measure the glucose levels in the interstitial liquid, providing information about glucose patterns and trends, but do not replace the self-monitoring of capillary glucose. Improvement in diabetes control using the CGMS depends on the motivation and training received by the patient and family and on the continuity in its use. Due to the development and widespread use of these systems in clinical practice, the diabetes group of the Sociedad Española de Endocrinología Pediátrica has drafted a document of consensus for their indication and use in children and adolescents. Only a limited number of trials have been performed in children and adolescent populations. More data are needed on the use of this technology in order to define the impact on metabolic control.

Documento de consenso sobre tratamiento con infusión subcutánea continua de insulina de la diabetes tipo 1 en la edad pediátrica / Consensus document on continuous subcutaneous insulin infusion (CSII) treatment in paediatrics with type I diabetes

Este artículo expone el documento consenso al que ha llegado el Grupo de Trabajo de Diabetes Pediátrica de la Sociedad Española de Endocrinología Pediátrica de la Asociación Española de Pediatría sobre el tratamiento con infusión subcutánea continua de insulina en diabetes tipo 1 en la edad pediátrica. Se recogen los aspectos prácticos sobre requisitos, indicaciones, contraindicaciones, candidatos, ventajas e inconvenientes de dicho tipo de tratamiento. Las conclusiones se basan en la revisión de los consensos internacionales basados en la evidencia y en el acuerdo de los participantes (AU)

This article reports on the Spanish Position Statement for the Diabetes Pediátric Group for the Spanish Pediatric Endocrinology Society (SEEP) on continuous subcutaneous insulin infusion in children and adolescents with type 1 diabetes. The practical issues about their indications, appropriate candidates, feasibility, and limits are outlined. The conclusions are based on the comprehensive review and balanced assessment of the evidence base on the international consensus and consensual answers to these questions for the participants (AU)

[Consensus document on continuous subcutaneous insulin infusion (CSII) treatment in paediatrics with type I diabetes]. / Documento de consenso sobre tratamiento con infusión subcutánea continua de insulina de la diabetes tipo 1 en la edad pediátrica.

This article reports on the Spanish Position Statement for the Diabetes Pediátric Group for the Spanish Pediatric Endocrinology Society (SEEP) on continuous subcutaneous insulin infusion in children and adolescents with type 1 diabetes. The practical issues about their indications, appropriate candidates, feasibility, and limits are outlined. The conclusions are based on the comprehensive review and balanced assessment of the evidence base on the international consensus and consensual answers to these questions for the participants.

Alternative boundary conditions for Monte Carlo simulations based on self-consistent correlations: application to the two- and three-dimensional Ising models.

An alternative to periodic boundary conditions is developed and tested in Monte Carlo simulations of the two- and three-dimensional Ising models. The boundary conditions are based on a mean-field approach that incorporates consistency constraints for the magnetization and correlations between nearest neighbors by means of an effective field and an extra coupling between nearest neighbors at the boundary of the simulation box. During the simulation the self-consistent equations are solved, and statistics are accumulated to obtain thermodynamic averages. In comparison with the standard periodic boundary conditions the method gives a more accurate estimation of nonuniversal magnitudes, such as the transition temperature and the behavior of the magnetization, but it cannot compete with the accuracy of other strategies such as finite-size scaling theory or Monte Carlo renormalization group to obtain critical exponents.

Generalized boundary conditions for periodic lattice systems: application to the two-dimensional Ising model on a square lattice.

We show that the thermal properties of periodic lattice systems can be approximated to that of a finite cluster with appropriate boundary conditions which include a modified Hamiltonian for the boundary variables. Imposing lattice invariance on the correlation of the local site variables is sufficient to obtain the free parameters of the boundary Hamiltonian. The degree of accuracy of the calculation depends on the interaction range allowed in the boundary Hamiltonian and the range up to which the correlation of the site variables are made lattice invariant. The Bethe approximation can be considered a trivial case of this general method for clusters of one lattice site. The reliability of the method is demonstrated with the results obtained for the two-dimensional Ising model, where a cluster of four spins and invariance conditions up to second neighbors is sufficient to reproduce some nonuniversal thermal properties of the model with an accuracy comparable or better than other more complex numerical methods.

[Randomized double-blind study of treatment of croup with adrenaline and/or dexamethasone in children]. / Estudio randomizado doble ciego del tratamiento del crup en la infancia con adrenalina y/o dexametasona.

We present the results of a study designed to verify the efficacy of nebulized L-Adrenaline and/or dexamethasone given intramuscularly (IM) in the treatment of croup during childhood. Sixty-six children, hospitalized for croup during the period between october 1989 and september 1990, entered the study. They received the ordinary treatment with oxygen-therapy and fluid-therapy and were randomly assigned, in a double-blind fashion, into one of four treatment groups: Group 1: Nebulized L-Adrenaline and placebo (IM). Group 2: Nebulized saline and placebo (IM). Group 3: Nebulized saline and dexamethasone (IM). Group 4: Nebulized L-Adrenaline and dexamethasone (IM). The clinical evaluation was based on a scoring system assessing the inspiratory stridor, croupy cough, retractions and cyanosis. An analysis of variance was performed on the evolution of the score for two factors (Adrenaline and dexamethasone) to verify that there was no interaction between them. Subsequently, a one-factor analysis of variance was performed on the four treatment groups. We conclude that nebulized Adrenalin is more beneficial than saline in the clinical evolution of croup (p < 0.05). However, we did not find a statistically significant improvement in the group treated with dexamethasone when compared with the group treated with the placebo IM injection.