A five-year follow up study was carried out in 164 nasal allergy patients who were treated by specific immunotherapy. The result of the therapy were evaluated by a questionnaire or interview on nasal symptoms and assessed as good when the symptoms disappeared or so slight, as not to interfere with the patients' daily life.
Good results were observed in 80% of house dust allergy cases, 75% of mold allergy, and in 25% of pollinosis cases.
In perennnial nasal allergy, good results were obtained frequently from the pateints whose symptoms were slight or moderate and improved within 6 months after the treatment, but were obtained only occasionally from the patients whose symptoms consisted of severe nasal obstruction or whose offending allergens were misdiagnosed.
The good results lasted for 5 years in the majority of patients who were treated continously for more than 2 years, and showed stable and good conditions at the time of cessation of the treatment.
In pollinosis the addition of other treatments to the present immunotherapy was necessary for obtaining good results.
