Results of patch testing with a special series of rubber allergens.
The purpose of this study was to examine the results of patch testing with the rubber components on a standard screening tray and compare them with the results of testing with a special series of 27 rubber components (rubber tray). 1670 patients were patch tested with the screening tray and 317 of these were also tested with the rubber tray. 16% of those tested with the rubber tray had a positive response to at least 1 of the rubber allergens on the screening tray and 22% had a positive response to at least 1 of the allergens on the rubber tray. The most common positive response to the rubber tray allergens was to tetramethylthiuram monosulfide. There were no responses to 3 of the components on the rubber tray and there was only 1 positive response to a further 4 components. The diagnostic test characteristics of the rubber components on the screening tray were examined using the rubber tray as the gold standard. The sensitivity of the screening tray was 94%, specificity 51%, positive predictive value 87% and negative predictive value 71%. Of the 317 tested, 11% were found to have a positive to a substance on the rubber tray that was not evident from the results of the screening tray.
Holness
D L
DL
Department of Occupational and Environmental Health, St Michael's Hospital, University of Toronto, Canada.
Nethercott
J R
JR
D000328:Adult; D017449:Dermatitis, Allergic Contact / Q000175:diagnosis* / Q000209:etiology; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D010328:Patch Tests / Q000379:methods*; D011237:Predictive Value of Tests; D012044:Regression Analysis; D012408:Rubber / Q000008:administration & dosage / Q000009:adverse effects*; D012680:Sensitivity and Specificity
D012408:Rubber