RESUMO
BACKGROUND: Allergic diseases are under-investigated and overlooked health conditions in developing countries. We measured the prevalence of food allergy (FA), airborne allergic disease, and allergic sensitisation among adolescents living in 2 socio-demographically disparate regions in Ecuador. We investigated which risk factors are associated with these conditions. METHODS: A cross-sectional study involved 1338 students (mean age: 13 ± 0.9 years old) living in Cuenca (n = 876) and Santa Isabel (n = 462). History of allergic symptoms (noted by parents or doctor) to food, house dust mites (HDM), pollen, and pets were recorded. Sociodemographic characteristics, environmental exposures, and parental history of allergic disorders data were collected. Sensitisation to 19 food and 20 aeroallergens was measured by skin-prick testing (SPT). FA and airborne allergic diseases (to HDM, pollen, cat, or dog) were defined as a report of allergic symptoms noted by doctor, together with a positive SPT (wheal size ≥3 mm). Logistic regression models were used to identify environmental and parental factors associated with allergic conditions. RESULTS: FA was prevalent among 0.4% (95% CI 0.2%-0.9%), and food sensitisation among 19.1% of the adolescents. Shrimp was the most frequent food linked with FA and food sensitisation. Risk factors associated with FA could not be evaluated due to the low prevalence. Food sensitisation was higher among adolescents exposed to family smoking (OR 1.63, 95% CI 1.14-2.34, p = 0.008) and those with parental history of allergic disorders (OR 1.68, 95% CI 1.13-2.49, p = 0.01), but less common among adolescents owning dogs (OR 0.59, 95% CI 0.41-0.84, p = 0.003).Airborne allergic diseases were prevalent amongst 12.0% of the adolescents (95% CI: 10.4-13.9, n = 1321), with HDM as the primary allergen (11.2%). Airborne allergic diseases were less common among adolescents with more siblings (OR 0.79, 95% CI 0.65-0.96, p = 0.02) and those who lived with farm animals in the first year of life (OR 0.47, 95% CI 0.23-0.95, p = 0.04), but, most common among adolescents with a smoking family (OR 1.67, 95% CI 1.04-2.70, p = 0.03) and with a parental history of allergic disorders (OR self-perceived: 2.62, 95% CI 1.46-4.71, p = 0.001; OR diagnosed by a doctor: 4.07, 95% CI 2.44-6.80, p < 0.001). CONCLUSIONS: FA and airborne allergies are less prevalent in Ecuador than in developed regions; there is a great dissociation between the prevalence of allergic disease and allergic sensitisation. Shrimp and HDM were the most prevalent allergens. Risk factors identified in this study to be related to allergic diseases should be considered by physicians, health practitioners, and epidemiologists in Ecuador.
RESUMO
Antecedentes: La adolescencia es un periodo de crecimiento acelerado en donde se producen una serie de cambios físicos, lo que origina una mayor demanda de necesidades nutricionales, tanto de energía como de carbohidratos, proteínas, grasas, vitaminas y minerales. Estas características condicionan la posibilidad de producirse deficiencias nutricionales en esta edad si la ingesta no es la adecuada.Objetivo: El objetivo de este estudio es evaluar el con-sumo de macronutrientes, sodio, calcio y azúcar añadido en adolescentes de Cuenca y Nabón de acuerdo a las recomendaciones establecidas por la OMS. Materiales y Método: Un estudio descriptivo transversal fue realizado desde enero 2008 hasta abril 2009 en 765 adolescentes de 8vo, 9no y 10mo de educación básica de Cuenca y Nabón (Ecuador). La recolección de la ingesta dietaria fue mediante recordatorio de 24 horas aplicado en 2 días no consecutivos. Se utilizó el Software Lucille 0.1 para el ingreso y el cálculo de la ingesta de alimentos. El análisis de los datos fue realiza-do mediante el programa estadístico STATA 12, donde se determinó el consumo diario de nutrientes ajustado para la energía total y se calculó el porcentaje de adolescentes que cumple con las recomendaciones de la OMS. resultados: La ingesta de carbohidratos (80%), grasas (76%) y proteínas (67%), en la mayoría de los adolescentes se encuentran dentro del rango recomendado por la OMS; sin embargo, en el caso del consumo de sodio y azúcar añadido, los valores de más de la mitad de los adolescentes están por encima de las recomendaciones. Así también, solo alrededor del 1% de la población estudiada cumple con los requerimientos diarios de consumo de calcio. Conclusión: Esta población de adolescentes presenta un desequilibrio en la ingesta dietética, especialmente de micronutrientes y azúcar añadido. Por lo que se ven necesarios programas de intervención en alimentación saludable y prevención de la obesidad e hipertensión sobre todo en las instituciones educativas.
Objective: The objective of this study is to evaluate the intake of macronutrients, sodium, calcium and added sugar in adolescents of Cuenca and Nabón according to the recommendations established by the WHO. Materials and Method: A cross-sectional descriptive study was conducted from January 2008 to April 2009 in 765 adolescents from 8th, 9th and 10th grade basic education in Cuenca and Nabón (Ecuador). The collec-tion of dietary intake was through a reminder of 24-hours that was applied in 2 non-consecutive days. The Softwa-re Lucille 0.1 was used for the intake and calculation of ingested food. Data analysis was performed using the statistical program STATA 12, which determined the daily intake of nutrients that were adjusted for the total energy and calculated according to the percentage of adolescents that follows the WHO recommendations.rEsults: The intake of carbohydrates (80%), fats (76%) and proteins (67%) in most adolescents are within the range recommended by the WHO; however, in the case of consumption of sodium and added sugar, the values of more than half of adolescents are above re-commendations. Thus, only about 1% of the population studied meets the daily requirements of calcium con-sumption. Conclusion: This population of adolescents presents an imbalance in dietary intake, especially of micronu-trients and added sugar. Therefore, intervention pro-grams in healthy eating and prevention of obesity and hypertension are necessary especially in educational institutions.
