Journal
CONTACT DERMATITIS
Volume 72, Issue 2, Pages 106-114Publisher
WILEY-BLACKWELL
DOI: 10.1111/cod.12319
Keywords
allergic cobalt dermatitis; allergy; cobalt; cobalt allergy; cobalt chloride; dermatitis; leather; metals
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Funding
- Aage Bangs Foundation
- Aase and Ejnar Danielsen Foundation
- Lundbeck Foundation
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BackgroundCobalt is a strong skin sensitizer and a prevalent contact allergen. Recent studies have recognized exposure to leather articles as a potential cause of cobalt allergy. ObjectivesTo examine the association between contact allergy to cobalt and a history of dermatitis resulting from exposure to leather. MethodsA questionnaire case-control study was performed: the case group consisted of 183 dermatitis patients with a positive patch test reaction to cobalt chloride and a negative patch test reaction to potassium dichromate; the control group consisted of 621 dermatitis patients who did not react to either cobalt or chromium in patch testing. Comparisons were made by use of a (2)-test, Fisher's exact, and the Mann-Whitney test. Logistic regression analyses were used to test for associations while taking confounding factors into consideration. ResultsLeather was observed as the most frequent exposure source causing dermatitis in the case group. Although the case group significantly more often reported non-occupational dermatitis caused by leather exposure (p < 0.001), no association was found between cobalt allergy and dermatitis caused by work-related exposure to leather. ConclusionsOur study suggests a positive association between cobalt allergy and a history of dermatitis caused by non-occupational exposure to leather articles.
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