Monitoring of airborne Japanese cedar and Japanese cypress pollen in Nagasaki prefecture. -A clinical review of a 30-year data series-

bjective: To describe the situation of Japanese cedar (JC) and Japanese cypress pollens in Nagasaki prefecture based on a 30-year data series ranging from 1990 to 2019. Methods: The data of JC and Japanese cypress pollens at eight measurement sites in Nagasaki prefecture was retrospectively studied. A one-way analysis of variance was used to determine annual differences among the eight sites. Simple regression analyses were used to detect annual increasing or decreasing trends in the scattering of JC and Japanese cypress pollens at each of the eight sites. Results: JC pollen scattering began in early to mid-February and ended between late March and mid-April, while Japanese cypress pollen scattering began in mid-March to early April and ended in mid- to late April. Positive correlations between the total counts of JC pollens and year were observed in four measurement sites, while a positive correlation between the total count of Japanese cypress pollens and year was found in Goto city. Regional differences were statistically observed in the annual mean JC pollen values. Conclusions: Because these data are extremely meaningful, the work of Nagasaki Association of Medical Technologists and Nagasaki Medical Association is necessary for the future treatment of patients with JC and/or Japanese cypress pollinosis