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COMPARATIVE STUDY
JOURNAL ARTICLE
Skin reactivity and specific IgE levels in the evaluation of allergic sensitivity to common allergens for epidemiological purposes.
Clinical Allergy 1986 January
An investigation was conducted to test the validity of the skin-prick test (SPT) with eleven common allergens (Lofarma series proposed by Italian National Research Council for epidemiological studies) as a method for predicting the presence of specific antibodies in serum. The relationship between SPT, evaluated by two different methods (MWD = mean weal diameter, AHWR = allergen histamine weal ratio), and specific IgE levels (RAST) has been investigated in 101 patients tested consecutively for suspected allergic disease. Sensitivity, specificity and overall efficiency were assessed for different criteria of SPT positivity (greater than or equal to 4 mm or greater than or equal to 5 mm using MWD; ++ or using AHWR). For pollens and moulds, a weal diameter greater than or equal to 5 mm gave better results than 4 mm, whereas for mites a MWD greater than or equal to 4 mm showed a better sensitivity and overall efficiency than 5 mm. Danders showed low sensitivity when either 5 or 4 mm criterion was considered. AHWR evaluation gave no better results, except for animal danders. Correlation coefficients between weal size and RAST class showed a good relationship for mites and pollens using both methods of SPT evaluation; a moderate relationship was observed with MWD criterion for moulds and with AHWR for danders. We conclude that a weal diameter greater than or equal to 5 mm can be assumed to to predict RAST positivity for pollens and moulds, and for mites, a weal greater than or equal to 4 mm can be a more accurate criterion.(ABSTRACT TRUNCATED AT 250 WORDS)
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