An analysis of skin prick test reactivity to dust mite in overweight and normal weight children with allergic asthma before and after specific immunotherapy

WANG Jian; HUANG Ying; ZHANG Xue-Li; HUANG Xia; XU Xiao-Wen; LIANG Fan-Mei

doi:10.7499/j.issn.1008-8830.2016.04.010

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Chinese Journal of Contemporary Pediatrics ›› 2016, Vol. 18 ›› Issue (4) : 329-334. DOI: 10.7499/j.issn.1008-8830.2016.04.010

CLINICAL RESEARCH

An analysis of skin prick test reactivity to dust mite in overweight and normal weight children with allergic asthma before and after specific immunotherapy

WANG Jian, HUANG Ying, ZHANG Xue-Li, HUANG Xia, XU Xiao-Wen, LIANG Fan-Mei

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Abstract

Objective To study the skin prick test (SPT) reactivity to house dust mite allergens in overweight and normal weight children with allergic asthma before and after standard subcutaneous specific immunotherapy. Methods Two hundred and fifteen children with allergic asthma who had positive SPT responses to Dermatophagoides pteronyssinus (DP) and Dermatophagoides farinae (DF) were enrolled. According to the weight index, they were classified into overweight (n=63) and normal weight groups (n=152). Skin indices (SI) to DP and DF were compared between the two groups at 6 months and 1 year after standard subcutaneous specific immunotherapy. Results The overweight group had a significantly larger histamine wheal diameter than the normal weight group after controlling the variation in testing time (P<0.05). After controlling the variation in weights, there were significant differences in the SIs to DP and DF before specific immunotherapy and at 6 months and 1 year after specific immunotherapy. At 6 months and 1 year after specific immunotherapy, the SIs to DP and DF were significantly reduced in both groups (P<0.05), and the overweight group had greater decreases in the SIs to DP and DF than the normal weight group. Conclusions The overweight children with allergic asthma have stronger responses to histamine than the normal weight patients. Specific immunotherapy can reduce the reactivity to dust mite allergens in children with allergic asthma. Within one year after specific immunotherapy, the overweight children with allergic asthma have a significantly greater decrease in the reactivity to dust mite allergens than the normal weight patients.

Key words

Overweight / Allergic asthma / Skin prick test / Skin index / Specific immunotherapy / Child

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WANG Jian, HUANG Ying, ZHANG Xue-Li, HUANG Xia, XU Xiao-Wen, LIANG Fan-Mei. An analysis of skin prick test reactivity to dust mite in overweight and normal weight children with allergic asthma before and after specific immunotherapy[J]. Chinese Journal of Contemporary Pediatrics. 2016, 18(4): 329-334 https://doi.org/10.7499/j.issn.1008-8830.2016.04.010

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