Publication: Physical urticaria: Prevalence, type and natural course in a tropical country
Issued Date
2011-10-01
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ISSN
14683083
09269959
09269959
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2-s2.0-80052981528
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of the European Academy of Dermatology and Venereology. Vol.25, No.10 (2011), 1194-1199
Suggested Citation
N. Silpa-Archa, K. Kulthanan, S. Pinkaew Physical urticaria: Prevalence, type and natural course in a tropical country. Journal of the European Academy of Dermatology and Venereology. Vol.25, No.10 (2011), 1194-1199. doi:10.1111/j.1468-3083.2010.03951.x Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/12289
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Title
Physical urticaria: Prevalence, type and natural course in a tropical country
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Abstract
Background Physical urticarias (PU) are an urticarial response to different specific physical stimuli. PU can occur concurrently with chronic spontaneous urticaria or another type of PU. Objective We aimed to study the prevalence, type, clinical data and natural course of each type of PU and other inducible urticarias and also the prognostic factors for remission of patients visiting a tertiary referral hospital. Method We performed a retrospective study of 1200 chronic urticaria patients who visited our Urticaria Clinic during a period of 5 years. Results Of the 1200 chronic urticaria patients, 86 (7.2%) were diagnosed as PU and other inducible urticarias. The most common type of PU was symptomatic dermographism (n = 35, 40.7%) followed by cold urticaria (n = 20, 23.3%) and delayed pressure urticaria (n = 11, 12.8%), respectively. Twelve patients (13.9%) had associated chronic spontaneous urticaria. None of the cases had multiple types of PU. Erythrocyte sedimentary rate elevation was the most common abnormal laboratory result. Nevertheless, only 4.6% declared a related infection. For each type, the median time after onset before 50% remission showed that cholinergic urticaria took the shortest course (34 months) and delayed pressure urticaria took the longest period (110 months). After 1 year and 5 years from the onset of symptoms, 13% and 50% of PU patients were free of symptoms, respectively. Conclusion This study emphasized the variety of PU, other inducible urticarias and natural courses based on tertiary hospital care. PU and other inducible urticarias have tendency to have a longer course than chronic spontaneous urticaria. © 2010 The Authors. Journal of the European Academy of Dermatology and Venereology.