title: Comparative study of cluster and conventional immunotherapy schedules with dermatophagoides pteronyssinus in the treatment of persistent allergic rhinitis.
abstract: OBJECTIVE
  Allergy to house dust mite is one of the most common causes of allergic rhinitis (AR) in China. We sought to compare the efficacy and safety of a 6-week cluster schedule of specific immunotherapy with that of a 14-week conventional schedule for the treatment of subjects with persistent AR.
  
  
  METHODS
  The trial was a prospective and randomized study involving 96 patients with persistent AR, aged 14-60 years, who were allergic to Dermatophagoides pteronyssinus. While 48 patients were randomly assigned to the cluster schedule reaching the maintenance dose within 6 weeks, the other 48 were randomly assigned to the conventional schedule reaching the maintenance dose within 14 weeks. Eighty-nine patients completed a 1-year treatment course. While kinetic changes in clinical efficacy and adverse reactions were observed during the treatment, quality of life, cutaneous reactivity and serum-specific immunoglobulin E to Dermatophagoides pteronyssinus were measured before and after treatment.
  
  
  RESULTS
  The cluster schedule reduced the time to reach the maintenance dose by 57% and caused mild systemic adverse reactions after 1.0% of injections (6.7% of patients), with no differences in comparison with the conventional schedule. Cluster specific immunotherapy led to decreases in clinical symptoms and earlier use of medication than did the conventional schedule. Similar improvements in quality of life and reduced cutaneous reactivity without significant changes in specific immunoglobulin E were observed in both groups after 1 year.
  
  
  CONCLUSIONS
  The cluster schedule is a safe alternative to the conventional schedule with the advantage of achieving clinical effectiveness sooner.
authors.affiliation: Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Key Laboratory of Otolaryngology Head and Neck Surgery, Capital Medical University, Ministry of Education, Beijing, PR China. Luozhang@trhos.com
authors.forename: Luo
authors.initials: L
authors.lastname: Zhang
authors.forename: Chengshuo
authors.initials: C
authors.lastname: Wang
authors.forename: Demin
authors.initials: D
authors.lastname: Han
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Jianhui
authors.initials: J
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D000485:Allergens / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology / Q000627:therapeutic use; D000818:Animals; D039741:Antigens, Dermatophagoides / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology / Q000627:therapeutic use; D040002:Dermatophagoides pteronyssinus / Q000276:immunology*; D003888:Desensitization, Immunologic / Q000379:methods*; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012221:Rhinitis, Allergic, Perennial / Q000276:immunology* / Q000503:physiopathology / Q000628:therapy*; D012720:Severity of Illness Index; D012882:Skin Tests; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D000485:Allergens; D039741:Antigens, Dermatophagoides