title: Direct comparison between continuous and coseasonal regimen for sublingual immunotherapy in children with grass allergy: a randomized controlled study.
abstract: BACKGROUND
  Pre-seasonal, pre-coseasonal and continuous regimens of immunotherapy have been proposed, but their efficacy was never compared. This phase IV open study was designed to compare the clinical efficacy of a continuous and a coseasonal sublingual immunotherapy (SLIT) for grass allergy over 3 years.
  
  
  METHODS
  Children with rhinitis/asthma because of grass were randomized to SLIT given continuously (all year long) or coseasonally. The treatment started in October 2005 in the continuous SLIT group and in March 2006 in the coseasonal group Diary cards for clinical symptoms (from 0 = none to 3 = severe), and drug intake were recorded form March to June in 2005 (baseline), 2006 2007, and 2008. Specific IgE and IgG4 were evaluated every year.
  
  
  RESULTS
  Eighty children (age range 8-16) were randomized and 72 completed the study. In the first year, the symptom + medication score improved by 44% in the continuous group and by 20% in the coseasonal group (p = 0.04). Symptoms, chest symptoms, and drug intake separately showed a greater decrease vs. baseline in the continuous group. In the second year, the global score decreased in both groups with no significant difference, whereas symptom score decreased more in the continuous group. In the 3rd year, there was no difference in clinical parameters between the two groups. Specific IgG4 were significantly higher vs. baseline since the 1st year in the continuous group and since the 2nd in the coseasonal group.
  
  
  CONCLUSIONS
  In grass pollen allergy, the continuous regimen performs better than the coseasonal in the first season, whereas in the subsequent years, the two regimens are nearly equivalent.
authors.affiliation: Department of Pediatrics, Allergy Unit, University of Messina, Messina, Italy.
authors.forename: Giovanni B
authors.initials: GB
authors.lastname: Pajno
authors.forename: Lucia
authors.initials: L
authors.lastname: Caminiti
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Crisafulli
authors.forename: Daniela
authors.initials: D
authors.lastname: Vita
authors.forename: Mariella
authors.initials: M
authors.lastname: Valenzise
authors.forename: Raffaele
authors.initials: R
authors.lastname: De Luca
authors.forename: Giovanni
authors.initials: G
authors.lastname: Passalacqua
mesh_terms: D000286:Administration, Sublingual; D000293:Adolescent; D000485:Allergens / Q000009:adverse effects / Q000276:immunology; D052179:Antigens, Plant / Q000276:immunology; D002648:Child; D002985:Clinical Protocols; D003888:Desensitization, Immunologic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D006109:Poaceae; D011058:Pollen / Q000009:adverse effects; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy* / Q000276:immunology* / Q000503:physiopathology; D012621:Seasons
chemical_list: D000485:Allergens; D052179:Antigens, Plant