Association between Asian Dust-Borne Air Pollutants and Daily Symptoms on Healthy Subjects: A Web-Based Pilot Study in Yonago, Japan

Abstract EN

During the spring, Asian dust (AD) repeatedly makes its way to Japan, originating from drylands.

We evaluated the association between AD-borne air pollutants and daily reported subjective symptoms in healthy subjects.

We constructed an Internet questionnaire on daily ocular, nasal, respiratory, and skin symptoms.

Forty-two healthy volunteers residents of Yonago (mean age, 33.57) were selected from the self-reporting web-based survey and recorded their symptoms between 1 and 31 of March 2013.

We also collected information on levels of suspended particulate matter (SPM), particulate matter < 2.5 µm (PM2.5), sulfur dioxide (SO2), and nitrogen oxide (NOx) per hour on each of those days.

SPM and PM2.5 were the dominant pollutants recorded throughout the month.

A positive correlation was observed between SPM and ocular (r=0.475, p<0.01), nasal (r=0.614, p<0.001), and skin (r=0.445, p<0.05) symptoms.

PM2.5 correlations were significant for ocular (r=0.428, p<0.05), nasal (r=0.560, p<0.01), and skin (r=0.437, p<0.05) symptoms.

Our findings provide introductory evidence of AD-borne air pollutants and their association with several bodily symptoms in healthy subjects with the implementation of a self-administrated web-based survey application.