Abstract
Of patients patch tested at a contact dermatitis clinic between 1985 and 1986, 22.5% (379/1685) had medicament sensitivity. The prevalence in men was 22.8% (193/847) and in women, 22.1% (186/838) (difference not significant). The rate appears to increase with age, 17.9% (216/1205) for patients less than 40 years old and 34.0% (163/480) for patients over 39 years old (difference, p less than 0.001). The differences in prevalence between Chinese (22.8%), Malay (21.3%), Indians (20.4%), and others (33.3%) were not statistically significant. Common sensitizers included neomycin (7.8%), proflavine (7.1%), clioquinol (4.3%), colophony (3.3%), and wool alcohol (2.7%). Proflavine sensitivity was significantly more common in men (9.9%) than women (4.2%) (p less than 0.001). Most dermatitis occurs on the limbs (upper limbs, 44.3%; lower limbs, 43.0%). Facial dermatitis was more common in women (37.4%) than men (19.2%) (difference not significant).
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