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Chronic urticaria in a health maintenance organization of Buenos Aires, Argentina - new data that increase global knowledge of this disease*

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Background In spite of the frequency of chronic urticaria, there are no epidemiological studies on its prevalence in Argentina. Objective The objective of this study was to define the prevalence… Click to show full abstract

Background In spite of the frequency of chronic urticaria, there are no epidemiological studies on its prevalence in Argentina. Objective The objective of this study was to define the prevalence and epidemiological characteristics of chronic urticaria patients in Buenos Aires. Methods The population studied were the members of the Italian Hospital Medical Care Program, a prepaid health maintenance organization located in the urban areas around the Autonomous City of Buenos Aires, Argentina. All patients with diagnosis of chronic urticaria members of the Italian Hospital Medical Care Program, and with at least 12 months of follow up were included in the study. All medical records obtained between January 1st, 2012 and December 31, 2014 were analyzed. The prevalence ratio for chronic urticaria per 100,000 population with 95% CI for December 31, 2014 was calculated. The prevalence rate for the entire population and then discriminated for adults and pediatric patients (less than 18 years old at diagnosis) was assessed. Results 158,926 members were analyzed. A total of 463 cases of chronic urticaria were identified on prevalence date (68 in pediatrics, 395 in adults), yielding a crude point prevalence ratio of 0.29% (CI 95% 0.26-0.31%). The observed prevalence of chronic urticaria in the adult population was 0.34 % (95% CI 0.31-0.38%), while in pediatrics it was 0.15 % (95% CI 0.11-0.20%). Study limitations the main weakness is that the results were obtained from an HMO and therefore the possibility of selection bias. Conclusions chronic urticaria is a global condition. Its prevalence in Buenos Aires is comparable with other countries.

Keywords: health maintenance; buenos aires; prevalence; maintenance organization; chronic urticaria

Journal Title: Anais Brasileiros de Dermatologia
Year Published: 2018

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