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Atopy Does Not Influence the Clinical Outcome of Acute Urticaria: A Retrospective Study.

BACKGROUND: Acute urticaria (AU) may be associated with atopy, but the relationship between atopic status and the clinical features of the disease has not been fully described.

OBJECTIVES: The aim of the study was to determine the proportion of atopy in AU patients and to see whether atopy is related to the clinical characteristics of AU and whether it has an impact on the outcome of the disease.

MATERIALS AND METHOD: A retrospective analysis of patients with AU was performed. Demographic data, clinical features, and laboratory results were compared and analyzed between the atopic and non-atopic AU (napAU).

RESULTS: In total, 139 participants were included. 54 (38.8%) patients were atopic AU (apAU) and 85 (61.2%) were napAU. Compared with napAU patients, apAU patients were more likely to have anaphylaxis, higher levels of C4, and lower levels of antistreptolysin. There were no significant differences between the two groups in terms of other clinical features, laboratory tests, the natural course of the disease, or disease outcomes.

CONCLUSION: Atopy does exist in some patients with AU, and AU patients with an atopic background are at higher risk for anaphylaxis. Atopy does not influence the clinical outcome of AU and is not correlated with other clinical features and laboratory results of AU.

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