Analysis of Pollinosis in Tianjin

To investigate the relationship between pollen concentration and morbidity of pollen allergy in Tianjin.Methods We retrospectively analyzed clinical data of 1 417 patients with pollen allergic in Chest Hospital and Police Hospital and the pollen survey data of Hexi district Iron Tower meteorological station of Tianjin from 2001 to 2005.The relationship was evaluated between age distribution,the grades of skin test reaction,the monthly numbers on pollen allergic disease,and pollen concentration.Results 20- 49 years old is the peak age to pollen allergy and account for 61.5% of whole population.The major peak period of pollen allergy is from August to September and the minor peak is April.The distribution of pollen concentration showed two peaks.The first peak appears from March to May.The second peak appears from August to September.The highest concentration of airborne pollens appears in April on the whole year.Mon- thly average maximum pollen concentration is 5 011 pollen granule in each square millimeter.Conclusions Incidence of pollen allergy is closely interrelated to pollen concentration.Middle-aged and young people are the main objects and the spring and autumn are the important period of preventing pollen allergy.