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Inicio Allergologia et Immunopathologia The safety profile of subcutaneous allergen immunotherapy in children with asthm...
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Vol. 45. Issue 6.
Pages 541-548 (November - December 2017)
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Vol. 45. Issue 6.
Pages 541-548 (November - December 2017)
Original Article
DOI: 10.1016/j.aller.2017.04.002
The safety profile of subcutaneous allergen immunotherapy in children with asthma in Hangzhou, East China
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J.-L. Liua,1, W.-X. Ningb,1, S.-X. Lia, Y.-C. Xua, L. Wua, Y.-S. Wanga, X.-F. Xua, Y. Jianga, Y.-J. Shenga, Y.-L. Zhoua, J.-H. Wanga, L.-F. Tanga, Z.-M. Chena,
Corresponding author
drchenzmin@163.com

Corresponding author.
a Department of Respiratory Medicine, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China
b Department of Dermatology, Guangxing Hospital, Zhejiang Chinese Medical University, Hangzhou, China
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Tables (7)
Table 1. Asthma severity scoring system.
Table 2. Treatment schedule of standardized immunotherapy.
Table 3. Basic information of patients.
Table 4. Prevalence of SRs in children and adolescents.
Table 5. Prevalence of SRs between mild and moderate asthma.
Table 6. Administered rescue medications for systemic reactions.
Table 7. Risk factors for SRs to SCIT analysed by logistic regression.
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Abstract
Background

The aim of the current study is to evaluate the prevalence, severity and possible risk factors of systemic reactions (SRs) to subcutaneous allergen immunotherapy (SCIT) in children and adolescents with asthma in Hangzhou, east China's Zhejiang province.

Methods

From January 2011 to December 2016, this survey analysed the SCIT-related SRs involving 429 patients (265 children and 134 adolescents) affected by allergic asthma. Recorded data included demographics, diagnosis, patient statuses, pulmonary function testing results before and after each injection, allergen dosage, and details of SRs.

Results

All patients finished the initial phase and six patients withdrew during the maintenance phase. There were 2.59% (328/12,655) SRs in all injections (3.28% in children and 1.47% in adolescents); 15.62% (67/429) patients experienced SRs (18.49% children and 10.98% adolescents). There were 54.57% SRs of grade 1; 42.37% SRs of grade 2; 3.05% SRs of grade 3; and no grades 4 or grade 5 SRs occurred in patients. Most reactions were mild, and were readily controlled by immediate emergency treatment. There was no need for hospitalisation. The occurrence of SRs was significantly higher in children than that in adolescents (p<0.01). A higher ratio of SRs was found among patients with moderate asthma.

Conclusion

This retrospective survey showed that properly-conducted SCIT was a safe treatment for children and adolescents with asthma in Hangzhou, East China. Children and patients with moderate asthma may be prone to develop SRs.

Keywords:
Asthma
Children
Subcutaneous allergen immunotherapy
Systemic reactions
Dermatophagoides pteronyssinus

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