The online version of this article (doi:10.1186/s12199-017-0623-x) contains supplementary material, which is available to authorized users.
The objective is to examine the association between AD and the daily number of medical consultations for pollinosis in Fukuoka City.
We analyzed 65,488 daily medical consultations for pollinosis from 4 clinics in Fukuoka City from February to April, 1989–2012. Time-series analyses were performed to estimate the clinic-specific relative risk (RR) of clinical pollinosis associated with AD, adjusting for airborne pollen, suspended particulate matter (SPM), meteorological and temporal factors. Delayed effects were considered. The association with SPM was also examined given its relationship with AD. The clinic-specific RRs were combined using meta-analytic technique.
AD on the same day (lag 0) and the previous 3 to 5 days (lags 3, 4, and 5) was positively associated with the risk of medical consultations for pollinosis. Clinic visits were 21.5% (95% confidence interval 3.1% – 43.1%) higher when there was an AD event (across lags 0–5). The association with SPM showed comparable lag structure, but with smaller effect estimates. When stratified by the occurrence of AD, the estimated risk increases associated with SPM did not differ between the AD-affected and AD-free days.
AD is associated with an increased risk of medical consultations for pollinosis in spring. More research is needed to elucidate the roles of air particles with different sizes.
Additional file 1: Table S1. Regressiona coefficients (beta), standard errors (SE) and P - values for the Asian dust (AD) indicator variable, pollen concentration, interaction between AD and pollen, suspended paticulate matter (SPM) and interaction between AD and SPM, by clinic in Fukuoka City, Japan. (PDF 233 kb)12199_2017_623_MOESM1_ESM.pdf
Additional file 2: Table S2. Regressiona coefficients (beta), standard errors (SE) and P - values for suspended paticulate matter (SPM), pollen concentration, and their interaction for four clinics in Fukuoka City, Japan. (PDF 179 kb)12199_2017_623_MOESM2_ESM.pdf
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- Association of Asian Dust with daily medical consultations for pollinosis in Fukuoka City, Japan
Chris Fook Sheng Ng
- BioMed Central