Abstract:
BACKGROUND:Background: Patch tests are an efficient method to confirm the etiological diagnosis of allergic contact dermatitis. OBJECTIVES:1) To determine the permanence of results between two tests performed with an interval of at least one year, in patients with allergic contact dermatitis; 2) To compare the positive results according to rates of intensity; 3) To evaluate the permanence of sensitization according to each substance that was tested. METHODS:Patients with previous diagnosis of allergic contact dermatitis, confirmed by patch tests carried out between the years 2005 and 2008, underwent new testing, using the same methodology, and data was compared. RESULTS:A total of 1470 results of both tests on 49 patients were analyzed. The negative results remained in the second test in a rate of 96%, and 4% became positive (+) without relevance to the clinical history. Moreover, moderately (++) and strongly (+++) positive results were also maintained in, respectively, 86% and 100%. Nevertheless, weakly (+) positive results became negative in 65%. By ignoring all weakly (+) positive tests, the calculation of Kappa Index of Agreement Statistics between the two tests showed a value of 0.88. CONCLUSION:Patch tests showed to be reliable for negative, moderately (++) positive and strongly (+++) positive results, by reproducing the same standard of individual response to allergens. However, for weakly (+) positive results, tests were not reliable.
journal_name
An Bras Dermatoljournal_title
Anais brasileiros de dermatologiaauthors
Duarte I,Silva Mde F,Malvestiti AA,Machado Bde A,Lazzarini Rdoi
10.1590/s0365-05962012000600002subject
Has Abstractpub_date
2012-11-01 00:00:00pages
833-7issue
6eissn
0365-0596issn
1806-4841pii
S0365-05962012000600002journal_volume
87pub_type
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journal_title:Anais brasileiros de dermatologia
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doi:10.1590/s0365-05962011000600010
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journal_title:Anais brasileiros de dermatologia
pub_type: 杂志文章
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更新日期:2012-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2015-07-01 00:00:00
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更新日期:2009-11-01 00:00:00