Prevalence and time trends of symptoms of allergic rhinitis and rhinoconjunctivitis in Spanish children: Global Asthma Network (GAN) study

Introduction: The time trends of the prevalence of rhinitis, rhinoconjunctivitis and nasal allergy previously described in the ISAAC (International Study of Asthma and Allergies in Childhood) in 2002 are unknown; or if the geographical or age differences in Spain persist. Objective: To describe the prevalence of rhinitis, rhinoconjunctivitis and nasal allergy in different Spanish geographical areas and compare them with those of the ISAAC. Methods: Cross-sectional study of the prevalence of rhinitis, rhinoconjunctivitis and nasal allergy, carried out in 2016-2019 on 19943 adolescents aged 13-14 years and 17215 schoolchildren aged 6-7 years from six Spanish areas (Cartagena, Bilbao, Cantabria, La Coruña, Pamplona, and Salamanca), through a questionnaire based on the Global Asthma Network (GAN) protocol. Results: The prevalences of recent rhinitis and rhinoconjunctivitis (last 12 months), and nasal allergy/hay fever were 35.1%, 17.6%, and 14.6% in the adolescents and 20%, 8.5%, and 8.9% in the schoolchildren, respectively, with rhinoconjunctivitis in adolescents varying from 20.9% in Bilbao to 13.4% in Cartagena; and in schoolchildren, from 9.8% in La Coruña to 6.4% in Pamplona. These prevalences of rhinoconjunctivitis and nasal allergy in adolescents were higher than those described in the ISAAC (16.3% and 13%) and similar in schoolchildren to the ISAAC (9% and 9.4%). Conclusions: There has been a stabilisation of rhinitis, rhinoconjunctivitis and nasal allergy in schoolchildren that slows the previous upward trend of ISAAC; and a slight non-significant increase in rhinoconjunctivitis and nasal allergy in adolescents. The variability found in adolescents would require local research to be better understood (AU)

Prevalencia y evolución temporal de síntomas de asma en España. Estudio Global Asthma Network (GAN) / Prevalence and temporal evolution of asthma symptoms in Spain. Global Asthma Network (GAN) study

Introducción: Se desconoce la evolución temporal de la prevalencia de asma descrita en el ISAAC (International Study of Asthma and Allergies in Childhood) en 2002 o si las diferencias geográficas o por edades se mantienen en España. Objetivo: Describir la prevalencia de los síntomas de asma en distintas áreas geográficas españolas y compararla con la de aquellos centros que participaron en el ISAAC. Métodos: Estudio transversal de prevalencia de asma, realizado en 2016-2019 a 19.943 adolescentes de 13-14 años y 17.215 escolares de 6-7 años de seis áreas geográficas españolas (Cartagena, Bilbao, Cantabria, La Coruña, Pamplona y Salamanca). Los síntomas de asma se recogieron mediante un cuestionario escrito y videocuestionario según el protocolo Global Asthma Network (GAN). Resultados: La prevalencia de sibilancias recientes (últimos 12 meses) fue del 15,3% a los 13-14 años y del 10,4% a los 6-7 años, con variaciones en los adolescentes, desde un 19% en Bilbao, hasta un 10,2% en Cartagena; y en los escolares, desde un 11,7% en Cartagena, hasta un 7% en Pamplona. Estas prevalencias fueron superiores a las del ISAAC (10,6% en adolescentes y 9,9% en los escolares). Un 21,3% de adolescentes y un 12,4% de los escolares refirieron asma alguna vez. Conclusiones: Existe una alta prevalencia de síntomas asmáticos con un incremento en los adolescentes y una estabilización en los escolares españoles con respecto al ISAAC. No se aprecian tan claramente variaciones geográficas en la prevalencia de asma, pero las áreas que tenían prevalencias elevadas mantienen cifras altas. (AU)

Introduction: The temporal evolution of the prevalence of asthma described in the International Study of Asthma and Allergies in Childhood (ISAAC) in 2002 is unknown, or if the geographical or age differences are maintained in Spain. Objective: To describe the prevalence of asthma symptoms in different Spanish geographical areas and compare it with that of those centers that participated in the ISAAC. Methods: Cross-sectional study of asthma prevalence, carried out in 2016–2019 with 19,943 adolescents aged 13–14 years and 17,215 schoolchildren aged 6–7 years from six Spanish geographical areas (Cartagena, Bilbao, Cantabria, La Coruña, Pamplona and Salamanca). Asthma symptoms were collected using a written questionnaire and video questionnaire according to the Global Asthma Network (GAN) protocol. Results: The prevalence of recent wheezing (last 12 months) was 15.3% at 13–14 years and 10.4% at 6–7 years, with variations in adolescents, from 19% in Bilbao to 10.2% in Cartagena; and in schoolchildren, from 11.7% in Cartagena to 7% in Pamplona. These prevalences were higher than those of the ISAAC (10.6% in adolescents and 9.9% in schoolchildren). About 21.3% of adolescents and 12.4% of schoolchildren reported asthma at some time. Conclusions: There is a high prevalence of asthmatic symptoms with an increase in adolescents and a stabilization in Spanish schoolchildren with respect to the ISAAC. Geographical variations in asthma prevalence are not so clearly appreciated, but areas with high prevalences maintain high numbers. (AU)

Prevalence and temporal evolution of asthma symptoms in Spain. Global Asthma Network (GAN) study.

INTRODUCTION: The temporal evolution of the prevalence of asthma described in the ISAAC (International Study of Asthma and Allergies in Childhood) in 2002 is unknown, or if the geographical or age differences are maintained in Spain. OBJECTIVE: To describe the prevalence of asthma symptoms in different Spanish geographic areas and compare it with that of those centers that participated in the ISAAC. METHODS: Cross-sectional study of asthma prevalence, carried out in 2016-2019 with 19,943 adolescents aged 13-14 years and 17,215 schoolchildren aged 6-7 years from 6 Spanish geographical areas (Cartagena, Bilbao, Cantabria, La Coruña, Pamplona and Salamanca). Asthma symptoms were collected using a written questionnaire and video questionnaire according to the Global Asthma Network (GAN) protocol. RESULTS: The prevalence of recent wheezing (last 12 months) was 15.3% at 13-14 years and 10.4% at 6-7 years, with variations in adolescents, from 19% in Bilbao to 10.2% in Cartagena; and in schoolchildren, from 11.7% in Cartagena to 7% in Pamplona. These prevalences were higher than those of the ISAAC (10.6% in adolescents and 9.9% in schoolchildren). 21.3% of adolescents and 12.4% of schoolchildren reported asthma at some time. CONCLUSIONS: There is a high prevalence of asthmatic symptoms with an increase in adolescents and a stabilization in Spanish schoolchildren with respect to the ISAAC. Geographic variations in asthma prevalence are not so clearly appreciated, but areas with high prevalences maintain high numbers.

Association of rhinitis with asthma prevalence and severity.

Asthma and rhinitis often co-exist in the same patient. Although some authors observed a higher prevalence and/or greater severity of asthma in patients with rhinitis, this view is not homogeneous and the debate continues. The aim of our study is to describe the prevalence of rhinitis in children and adolescents and to analyse their relationship with the prevalence of asthma. A multicentre study was conducted using the methodology of the International Study of Asthma and Allergies in Childhood (ISAAC). The target population of the study was all those school children aged 6-7 and 13-14 years from 6 of the main health catchment areas of Galicia (1.9 million inhabitants). The schools required were randomly selected, and all children in the targeted age ranges were included. Multiple logistic regression was used to obtain adjusted prevalence odds ratios (OR) between asthma symptoms of the schoolchildren and rhinitis prevalence. The results were adjusted for parental smoking habits, maternal education level, cat and dog exposure, and obesity. A total of 21,420 valid questionnaires were finally obtained. Rhinitis was associated with a significant increase in the prevalence of asthma in both age groups. The highest OR were 11.375 for exercise induced asthma (EIA) for children with recent rhinoconjunctivitis and 9.807 for children with recent rhinitis in 6-7 years old group. The prevalence OR's are higher in EIA and severe asthmatics. Rhinitis in children and adolescents is associated with a higher prevalence and severity of asthma.

Validación de un cuestionario en castellano sobre conocimientos de asma en profesores / Validation of a Questionnaire in Spanish on Asthma Knowledge in Teachers

Objetivo: Evaluar la fiabilidad y la validez de la versión en castellano del cuestionario NewCastle Asthma Knowledge Questionnaire (NAKQ) para la determinación de conocimientos sobre asma en profesores. Métodos: Diseño y muestra: estudio observacional, transversal, en centros educativos de A Coruña con segundo ciclo de educación infantil, primaria y/o secundaria obligatoria. Los centros se seleccionaron mediante muestreo aleatorizado, estratificado según titularidad y nivel educativo (24 centros, 864 profesores). Contestaron 537 (62,1%) docentes (precisión, ± 4%, seguridad, 95%). Mediciones: Edad, sexo, formación académica, experiencia docente, antecedentes personales/familiares de asma, cuestionario NAKQ. Análisis: Evaluación de consistencia interna (alfa de Cronbach). La validez concurrente se determinó comparando la puntuación en docentes asmáticos o con familiares asmáticos y docentes sin contacto con el asma. Se evaluó la fiabilidad test-retest en 2 centros seleccionados aleatoriamente, mediante índice Kappa, metodología de Bland-Altman y el coeficiente de correlación intraclase. Resultados: La puntuación media del cuestionario NAKQ fue 15,7 ± 5,3 (mediana 17), contestando correctamente el 50,6% de ítems. El coeficiente alfa de Cronbach fue 0,824 (IC 95%: 0,802-0,845). La puntuación NAKQ fue mayor en asmáticos o con familiares próximos asmáticos (17,7 ± 3,3) que en docentes con familiares lejanos asmáticos (16,1 ± 5,4) y docentes sin contacto próximo con el asma (15,1 ± 5,6; p < 0,001). En el análisis test-retest (Kappa 0,33 a 1) no hubo diferencias entre la puntuación NAKQ en la primera y la segunda cumplimentación (diferencia media, 0,3 ± 2,3; coeficiente de correlación intraclase, 0,863). Conclusiones: Las puntuaciones obtenidas con la versión española del NAKQ en profesores de centros escolares españoles son fiables y válidas para medir su grado de conocimiento de asma

Objective: To evaluate the reliability and validity of the Spanish version of the NewCastle Asthma Knowledge Questionnaire (NAKQ) for determining asthma knowledge in teachers. Methods: Design and sample: A cross-sectional observational study in educational centers of A Coruna˜ providing preschool, primary school and/or compulsory secondary education. Centers were selected by random sampling, stratified by ownership and educational level (24 centers, 864 teachers). A total of 537 (62.1%) teachers responded (precision, ± 4%, confidence, 95%). Measurements: Age, sex, academic training, teaching experience, personal/family history of asthma, NAKQ. Analysis: Evaluation of internal consistency (Cronbach’s alpha). Concurrent validity was determined by comparing scores of asthmatic teachers or with asthmatic relatives with teachers with no contact with asthma. Test-retest reliability was evaluated in two randomly selected centers by the kappa index, BlandAltman method and intraclass correlation coefficient. Results: Mean score on the NAKQ was 15.7 ± 5.3 (median 17), correctly answering 50.6% of items. Cronbach’s alpha coefficient was 0.824 (95% CI: 0.802-0.845). NAKQ score washigher inasthmatic teachers or with close asthmatic relatives (17.7 ± 3.3) than in teachers with distant asthmatic relatives (16.1 ± 5.4) and teachers without close contact with asthma (15.1 ± 5.6; P < 0.001). In the test-retest analysis (kappa 0.33-1), there were no differences in NAKQ score between the first and second completion (mean difference, 0.3 ± 2.3; intraclass correlation coefficient, 0.863). Conclusions: Scores obtained with the Spanish version of the NAKQ in teachers of Spanish school centers are reliable and valid to measure their degree of asthma knowledge

Validation of a questionnaire in Spanish on asthma knowledge in teachers.

OBJECTIVE: To evaluate the reliability and validity of the Spanish version of the NewCastle Asthma Knowledge Questionnaire (NAKQ) for determining asthma knowledge in teachers. DESIGN AND SAMPLE: A cross-sectional observational study in educational centers of A Coruña providing preschool, primary school and/or compulsory secondary education. Centers were selected by random sampling, stratified by ownership and educational level (24centers, 864teachers). A total of 537 (62.1%) teachers responded (precision, ±4%, confidence, 95%). MEASUREMENTS: Age, sex, academic training, teaching experience, personal/family history of asthma, NAKQ. ANALYSIS: Evaluation of internal consistency (Cronbach's alpha). Concurrent validity was determined by comparing scores of asthmatic teachers or with asthmatic relatives with teachers with no contact with asthma. Test-retest reliability was evaluated in two randomly selected centers by the kappa index, Bland-Altman method and intraclass correlation coefficient. RESULTS: Mean score on the NAKQ was 15.7±5.3 (median 17), correctly answering 50.6% of items. Cronbach's alpha coefficient was 0.824 (95%CI: 0.802-0.845). NAKQ score was higher in asthmatic teachers or with close asthmatic relatives (17.7±3.3) than in teachers with distant asthmatic relatives (16.1±5.4) and teachers without close contact with asthma (15.1±5.6; P<0.001). In the test-retest analysis (kappa 0.33-1), there were no differences in NAKQ score between the first and second completion (mean difference, 0.3±2.3; intraclass correlation coefficient, 0.863). CONCLUSIONS: Scores obtained with the Spanish version of the NAKQ in teachers of Spanish school centers are reliable and valid to measure their degree of asthma knowledge.

Is acetaminophen use associated with atopic eczema and other allergic diseases in adolescents?

Atopic Eczema (AE) is a chronic inflammatory skin disease that affects children and adults, and alters quality of life. Previous studies have suggested several socio-demographic and environmental factors related to the prevalence of AE and other allergic diseases, including acetaminophen use. In the present study, we report the rates of isolated AE, AE associated with asthma and AE associated with rhinitis among 13- to 14-year-old Spanish adolescents and the level of association of these conditions with the use of acetaminophen. We analyzed Spanish data from a cross-sectional Phase 3 study within ISAAC. A total of 28,717 adolescents completed the Phase 3 written questionnaire by answering questions for acetaminophen use and on asthma, rhinitis and AE symptoms.We observed an association between acetaminophen use and AE among the adolescents who had used acetaminophen in the previous month. Furthermore, the prevalence rate increased with the number of allergic processes: for AE alone, the adjusted Prevalence Ratio (aPR) was 1.81 and for AE associated with rhinitis or with asthma, aPRs were 2.20 and 3.03, respectively.We conclude that acetaminophen use in childhood may be an important factor associated with development and/or maintenance of AE and other allergic diseases.

Atopic dermatitis and indoor use of energy sources in cooking and heating appliances.

BACKGROUND: Atopic dermatitis (AD) prevalence has considerably increased worldwide in recent years. Studying indoor environments is particularly relevant, especially in industrialised countries where many people spend 80% of their time at home, particularly children. This study is aimed to identify the potential association between AD and the energy source (biomass, gas and electricity) used for cooking and domestic heating in a Spanish schoolchildren population. METHODS: As part of the ISAAC (International Study of Asthma and Allergies in Childhood) phase III study, a cross-sectional population-based survey was conducted with 21,355 6-to-7-year-old children from 8 Spanish ISAAC centres. AD prevalence, environmental risk factors and the use of domestic heating/cooking devices were assessed using the validated ISAAC questionnaire. Crude and adjusted odds ratios (cOR, aOR) and 95% confidence intervals (CIs) were obtained. A logistic regression analysis was performed (Chi-square test, p-value < 0.05). RESULTS: It was found that the use of biomass systems gave the highest cORs, but only electric cookers showed a significant cOR of 1.14 (95% CI: 1.01-1.27). When the geographical area and the mother's educational level were included in the logistic model, the obtained aOR values differed moderately from the initial cORs. Electric heating was the only type which obtained a significant aOR (1.13; 95% CI: 1.00-1.27). Finally, the model with all selected confounding variables (sex, BMI, number of siblings, mother's educational level, smoking habits of parents, truck traffic and geographical area), showed aOR values which were very similar to those obtained in the previous adjusted logistic analysis. None of the results was statistically significant, but the use of electric heating showed an aOR close to significance (1.14; 95% CI: 0.99-1.31). CONCLUSION: In our study population, no statistically significant associations were found between the type of indoor energy sources used and the presence of AD.

Prevalencia de síntomas de asma en los niños y adolescentes de la Comunidad Autónoma de Galicia (España) y sus variaciones geográficas / Prevalence and Geographic Variations in Asthma Symptoms in Children and Adolescents in Galicia (Spain)

Objetivos: Determinar la prevalencia y variaciones geográficas de síntomas relacionados con asma enniños y adolescentes gallegos.Población y métodos: Estudio transversal según la metodología ISAAC (Internacional Study of Asthmaand Allergies in Childhood) mediante cuestionario escrito distribuido en el medio escolar. Se incluyeron10.371 niños de 6-7 años y 10.372 adolescentes de 13-14 años de todas las Áreas Sanitarias de Galicia. Seanalizaron las variaciones geográficas mediante un modelo de regresión logística.Resultados: Las sibilancias en los últimos 12 meses oscilaron en los pequeños, del 11,4 (Santiago) al 15,7%(Vigo) y en los adolescentes del 8,8 (Ourense) al 18,8% (Vigo). Según el género se observó una mayorfrecuencia en varones de 6-7 años (p < 0,001) y con tendencia a la significación estadística en las chicasde 13-14 años (p = 0,08). El riesgo (Odds ratio [OR]) de sibilancias en los últimos 12 meses, en el área demayor prevalencia con respecto a la de menor, fue 1,45 (intervalo de confianza [IC] del 95%: 1,12-1,88)en niños y 2,39 (IC 95%: 1,82-3,13) en adolescentes. La prevalencia de asma estimada para Galicia fue de13,6% en niños y 12,2% en adolescentes.Conclusiones: La prevalencia de sibilancias en los últimos 12 meses en las diferentes áreas gallegas essensiblemente superior al resto de ciudades españolas participantes en el ISAAC en los pequeños, siendomuy similar en los adolescentes, salvo en Vigo donde es sensiblemente superior. Encontramos un patróngeográficomuydefinido en los adolescentes, siendo mayores las prevalencias en la costa que en el interior(AU)

Objectives: To determine the prevalence and geographic variations of the symptoms associated withasthma in Galician children and adolescents.Population and methods: A cross-sectional epidemiological study following ISAAC (International Studyof Asthma and Allergies in Childhood) methodology, and using a written questionnaire distributed inschools. The study sample included 10,371 6-7 year-old children and 10,372 13-14 year-old adolescents,all of them from Galician Health Areas. A logistic regression model was used to analyse geographic variations. Results: In the 6-7 year-old group, wheezing in the last 12 months varied from 11.4% (Santiago) to 15.7%(Vigo) and in the adolescents varied from 8.8% (Ourense) to 18.8% (Vigo). The distribution by gender showeda predominant significance in 6-7 year-old males (P < .001), and near to be statistically significant in 13-14year-old females (P = .08). The risk (odds ratio [OR]) of wheezing in the last 12 months in the area withhighest prevalence in comparison with the area of lowest prevalence was 1.45 (95% Confidence Interval[CI], 1.12-1.88) for children and 2.39 (95% CI, 1.82-3.13) for adolescents. The estimated prevalence of asthmain the Autonomous Community of Galicia was 13.6% in younger children and 12.2% in adolescents.Conclusions: The prevalence of wheezing in the last 12 months in the different areas of Galicia is considerablyhigher than the rest of Spanish ISAAC cities in the 6-7 years group and very similar in the 13-14 yearsgroup, except in Vigo where it is considerably higher. We found a clearly defined geographic pattern inthe adolescent group, with higher prevalences in coastal areas than in the interior(AU)

Prevalence and geographic variations in asthma symptoms in children and adolescents in Galicia (Spain).

OBJECTIVES: To determine the prevalence and geographic variations of the symptoms associated with asthma in Galician children and adolescents. POPULATION AND METHODS: A cross-sectional epidemiological study following ISAAC (International Study of Asthma and Allergies in Childhood) methodology, and using a written questionnaire distributed in schools. The study sample included 10,371 6-7 year-old children and 10,372 13-14 year-old adolescents, all of them from Galician Health Areas. A logistic regression model was used to analyse geographic variations. RESULTS: In the 6-7 year-old group, wheezing in the last 12 months varied from 11.4% (Santiago) to 15.7% (Vigo) and in the adolescents varied from 8.8% (Ourense) to 18.8% (Vigo). The distribution by gender showed a predominant significance in 6-7 year-old males (P<.001), and near to be statistically significant in 13-14 year-old females (P=.08). The risk (odds ratio [OR]) of wheezing in the last 12 months in the area with highest prevalence in comparison with the area of lowest prevalence was 1.45 (95% Confidence Interval [CI], 1.12-1.88) for children and 2.39 (95% CI, 1.82-3.13) for adolescents. The estimated prevalence of asthma in the Autonomous Community of Galicia was 13.6% in younger children and 12.2% in adolescents. CONCLUSIONS: The prevalence of wheezing in the last 12 months in the different areas of Galicia is considerably higher than the rest of Spanish ISAAC cities in the 6-7 years group and very similar in the 13-14 years group, except in Vigo where it is considerably higher. We found a clearly defined geographic pattern in the adolescent group, with higher prevalences in coastal areas than in the interior.

Contaminación del aire y síntomas recientes de asma, rinitis alérgica y eccema atópico en escolares de 6 y 7 años / Air Pollution and Recent Symptoms of Asthma, Allergic Rhinitis, and Atopic Eczema in Schoolchildren Aged Between 6 and 7 Years

Introducción: El objetivo del estudio ha sido analizar la relación entre contaminantes del aire y la prevalencia de síntomas recientes de asma, rinitis alérgica y eccema atópico, en escolares de 6 y 7 años.Pacientes y métodos: La prevalencia de síntomas de enfermedades alérgicas recientes (últimos 12 meses) se obtuvo mediante el cuestionario del estudio ISAAC (International Study of Asthma and Allergies in Childhood) España, con la participación de 7 centros (Asturias, Barcelona, Bilbao, Cartagena, La Coruña, Madrid y Valencia) y 20.455 escolares de 6 y 7 años, durante 2002–2003. De los sistemas de detección de contaminantes de los centros citados se obtuvieron datos de las concentraciones anuales medias de dióxido de azufre (SO2), dióxido de nitrógeno (NO2), monóxido de carbono (CO) y total de partículas en suspensión.Resultados: La concentración media anual (CMA) de SO2 se asoció significativamente con una mayor prevalencia de asma grave reciente (odds ratio ajustada [ORa], nivel 3 sobre nivel 1 de contaminación=1,32; intervalo de confianza [IC] del 95%, 1,01–1,73), rinitis (ORa=1,56; IC del 95%, 1,39–1,75) y rinoconjuntivitis (ORa=1,70; IC del 95%, 1,45–2,00). La CMA de CO se asoció con una prevalencia más alta de rinitis (ORa=1,65; IC del 95%, 1,34–2,04), rinoconjuntivitis (ORa=1,76; IC del 95%, 1,31–2,37) y eccema atópico (ORa=1,55; IC del 95%, 1,17–2,04). Las CMA de NO2 y de total de partículas en suspensión presentaron asociaciones inversas con la prevalencia de tos seca nocturna.Conclusiones: Se indica qué contaminantes del aire, como SO2 y CO, incrementan el riesgo de síntomas recientes de asma y rinitis alérgica en escolares de 6 y 7 años de nuestro medio(AU)

Objective: The objective of the study was to analyze the relationship between air pollutants and the prevalence of recent symptoms of asthma, allergic rhinitis, and atopic eczema in schoolchildren aged between 6 and 7 years.Patients and Methods: The prevalence of recent (previous 12 months) symptoms of allergic diseases was obtained by means of the questionnaire of the International Study of Asthma and Allergies in Childhood (ISAAC), Spain, with the participation of 7 centers (Asturias, Barcelona, Bilbao, Cartagena, La Coruña, Madrid, and Valencia) and 20 455 schoolchildren aged between 6 and 7 years, from 2002 to 2003. The pollutant detection systems of the aforementioned centers provided the mean annual concentrations of sulfur dioxide (SO2), nitrogen dioxide (NO2), carbon monoxide (CO), and total suspended particulate matter.Results: The annual average concentration of SO2 showed a significant association with a higher prevalence of recent severe asthma (adjusted odds ratio [aOR] between level-1 and level-3 pollution, 1.32; 95% confidence interval [CI], 1.01–1.73), rhinitis (aOR, 1.56; 95% CI, 1.39–1.75), and rhinoconjunctivitis (aOR, 1.70; 95% CI, 1.45–2.00). The annual average concentration of CO was associated with a higher prevalence of rhinitis (aOR, 1.65; 95% CI, 1.34–2.04), rhinoconjunctivitis (aOR, 1.76; 95% CI, 1.31–2.37), and eczema (aOR, 1.55; 95% CI, 1.17–2.04). The annual average concentration for NO2 and total suspended particulate matter showed inverse associations with the prevalence of nocturnal dry cough.Conclusions: Findings suggest that air pollutants such as SO2 and CO increase the risk of recent symptoms of asthma and allergic rhinitis in schoolchildren aged between 6 and 7 years in Spain(AU)

[Air pollution and recent symptoms of asthma, allergic rhinitis, and atopic eczema in schoolchildren aged between 6 and 7 years]. / Contaminación del aire y síntomas recientes de asma, rinitis alérgica y eccema atópico en escolares de 6 y 7 años.

OBJECTIVE: The objective of the study was to analyze the relationship between air pollutants and the prevalence of recent symptoms of asthma, allergic rhinitis, and atopic eczema in schoolchildren aged between 6 and 7 years. PATIENTS AND METHODS: The prevalence of recent (previous 12 months) symptoms of allergic diseases was obtained by means of the questionnaire of the International Study of Asthma and Allergies in Childhood (ISAAC), Spain, with the participation of 7 centers (Asturias, Barcelona, Bilbao, Cartagena, La Coruña, Madrid, and Valencia) and 20 455 schoolchildren aged between 6 and 7 years, from 2002 to 2003. The pollutant detection systems of the aforementioned centers provided the mean annual concentrations of sulfur dioxide (SO2), nitrogen dioxide (NO2), carbon monoxide (CO), and total suspended particulate matter. RESULTS: The annual average concentration of SO2 showed a significant association with a higher prevalence of recent severe asthma (adjusted odds ratio [aOR] between level-1 and level-3 pollution, 1.32; 95% confidence interval [CI], 1.01-1.73), rhinitis (aOR, 1.56; 95% CI, 1.39-1.75), and rhinoconjunctivitis (aOR, 1.70; 95% CI, 1.45-2.00). The annual average concentration of CO was associated with a higher prevalence of rhinitis (aOR, 1.65; 95% CI, 1.34-2.04), rhinoconjunctivitis (aOR, 1.76; 95% CI, 1.31-2.37), and eczema (aOR, 1.55; 95% CI, 1.17-2.04). The annual average concentration for NO2 and total suspended particulate matter showed inverse associations with the prevalence of nocturnal dry cough. CONCLUSIONS: Findings suggest that air pollutants such as SO2 and CO increase the risk of recent symptoms of asthma and allergic rhinitis in schoolchildren aged between 6 and 7 years in Spain.

Influence of two different geo-climatic zones on the prevalence and time trends of asthma symptoms among Spanish adolescents and schoolchildren.

Few studies have focused on the long-term influence of the climate on the prevalence of asthma. The aim of this study is to establish the influence of geo-climatic conditions on the prevalence of asthma symptoms both in adolescents and schoolchildren, and to discover if this influence is associated with their time trends. Eight centres in Spain performed both ISAAC phases I (1994) and III (2002) in children 13-14 years old. Six of them also surveyed children 6-7 years old. For each age group and phase, about 3,000 children were surveyed per centre. This study examines the prevalence of current wheeze and severe current wheeze in two different geo-climatic zones, coast and plateau, considering their relative humidity and temperature range. In both age groups, the mean asthma prevalence on the coast, for phase I and III, was significantly higher than on the plateau. Living on the plateau was an independent protective factor for current wheeze and severe current wheeze for the two age groups. Within the coastal centres, the increase of the annual relative humidity was a statistical significant risk factor for current wheeze, the same trend existing for current severe wheeze. These effects were independent of the sex and of the phase of the study. The prevalence of asthma and severe asthma symptoms is more frequent on the coast of Spain as compared to the inner plateau. This finding was repeated both in 1994 and in 2002.

[Prevalence of atopic eczema and nutritional factors in 6-7 year old children]. / Prevalencia de dermatitis atópica y factores nutricionales en niños de 6-7 años.

OBJECTIVES: To describe the prevalence of atopic eczema (AE) and to find the characteristics of the diet of children with AE. DESIGN: Descriptive, transversal study. SETTING: Primary schools. MAIN MEASUREMENTS: The study used the standardized and validated questionnaire of the ISAAC phase III study, which finds the prevalence of AE in children and enables inter-centre comparison to be conducted. A questionnaire about food consumption was included. The prevalence ratio (PR) of AE and food consumption (95% confidence intervals) was calculated. RESULTS: A total of 28 448 children aged 6-7 were included in the study. The prevalence of clinically diagnosed AE was 15.35% in boys and 15.24% in girls. The foods most often consumed were: dairy and cereals, followed by rice, pasta, and eggs. The least consumed were: butter, margarine, and fast food. The PR for children who consumed pasta was (PR=1.35), seafood (PR=1.28), cereals (PR=1.26), eggs (PR=1.13), and meat (PR=1.09). CONCLUSIONS: The prevalence of AE in Spain was 15.3%, and was associated with food consumption. The consumption of dairy products, cereals, and olive oil was appropriate. The intake of fruit, vegetables, seafood, and legumes was below the recommended amounts. Future studies on the question are needed.

Prevalencia de dermatitis atópica y factores nutricionales en niños de 6-7 años / Prevalence of atopic eczema and nutritional factors in 6-7 year old children

Objetivo. Describir la prevalencia de dermatitis atópica (DA) y conocer las características de la dieta en niños con DA. Diseño. Estudio descriptivo, transversal. Emplazamiento. Centros escolares de educación primaria. Mediciones principales. Se realizó un estudio mediante la utilización del cuestionario validado y estandarizado del estudio ISAAC de fase III, que permite conocer la prevalencia de DA en niños y compararla entre centros. Se acompañó de una encuesta sobre consumo de alimentos. Se calcularon la razón de prevalencia (RP) de DA en relación con el consumo de alimentos y los intervalos de confianza del 95%. Resultados. Se incluyó en el estudio a un total de 28.448 niños de 6-7 años. La prevalencia de DA clínicamente diagnosticada fue del 15,35% en niños y del 15,24% en niñas. Los alimentos más consumidos fueron la leche y los cereales, seguidos del arroz, la pasta y los huevos. Los alimentos menos consumidos fueron la mantequilla, la margarina y la comida rápida. Se observó una razón de prevalencia de DA en los niños que consumían pasta (RP = 1,35), pescado (RP = 1,28), cereales (RP = 1,26), huevos (RP = 1,13) y carne (RP = 1,09). Conclusiones. La prevalencia de DA en España fue del 15,3% asociada con el consumo de alimentos. El consumo de lácteos, cereales y aceite de oliva es adecuado. La ingesta de fruta, verdura, pescado y legumbres es inferior a la aconsejada. Sería necesario realizar futuros estudios sobre el tema

Objectives. To describe the prevalence of atopic eczema (AE) and to find the characteristics of the diet of children with AE. Design. Descriptive, transversal study. Setting. Primary schools. Main measurements. The study used the standardized and validated questionnaire of the ISAAC phase III study, which finds the prevalence of AE in children and enables inter-centre comparison to be conducted. A questionnaire about food consumption was included. The prevalence ratio (PR) of AE and food consumption (95% confidence intervals) was calculated. Results. A total of 28 448 children aged 6-7 were included in the study. The prevalence of clinically diagnosed AE was 15.35% in boys and 15.24% in girls. The foods most often consumed were: dairy and cereals, followed by rice, pasta, and eggs. The least consumed were: butter, margarine, and fast food. The PR for children who consumed pasta was (PR=1.35), seafood (PR=1.28), cereals (PR=1.26), eggs (PR=1.13), and meat (PR=1.09). Conclusions. The prevalence of AE in Spain was 15.3%, and was associated with food consumption. The consumption of dairy products, cereals, and olive oil was appropriate. The intake of fruit, vegetables, seafood, and legumes was below the recommended amounts. Future studies on the question are needed

[Time trends in prevalence of symptoms of allergic rhinitis in 13-14 year-old schoolchildren in 8 areas of Spain between 1993-1994 and 2001-2002 according to the International Study of Asthma and Allergies in Childhood (ISAAC)]. / Evolución temporal de la prevalencia de síntomas de rinitis alérgica en escolares de 13-14 años de 8 áreas españolas entre 1993-1994 y 2001-2002 según el Estudio Internacional sobre Asma y Alergias en la Infancia (ISAAC).

BACKGROUND AND OBJECTIVE: Our goal was to estimate the time trends in the prevalence of symptoms of allergic rhinitis (AR) and its geographic variations. POPULATION AND METHOD: During 2001-2002, the phase 3 of ISAAC study was carried out, and a comparison with the phase 1 (1993-1994) was done. This cross sectional study included 30,046 schoolchildren 13-14 years-old from 9 centers (Asturias, Barcelona, Bilbao, Cartagena, Castellon, Madrid, Pamplona, Valencia, and Valladolid). A questionnaire about rhinitis symptoms self-administered to schoolchildren was used at schools and institutes with a participation rate of 100% to 75.8%. RESULTS: A divergent time trend of AR prevalence symptoms was observed with a decrease in Barcelona and Bilbao, a stabilization in Cartagena, Pamplona, and Valencia, and an increase in Castellon; Madrid and Valladolid; however, there was an overall increase in nasal allergy. The prevalence of rhinoconjunctivitis in the past year (Prevalence Ratio [PR] = 1,13; 95% Confidence Interval [CI], 1.07-1.19) and nasal allergy ever (PR = 1.22; 95% CI, 1.15-1.30) increased after adjusting for gender, center and season change. The prevalence of rhinoconjunctivitis and nasal allergy varied according to centres, Madrid, Asturias, Cartagena and Bilbao exhibiting the higher prevalence. Taken as a whole, these data indicate a middle prevalence of AR when compared with other countries following an ISAAC methodology. CONCLUSIONS: Two patterns of time trend of prevalence of symptoms of AR were observed. The investigation of risk factors at local level could be important in order to undertake preventive measures.