Lee, Jae Young Ryu, Sung Hee Lee, Gwangjae Bae, Gwi-Nam 2024-01-20T05:02:18Z 2024-01-20T05:02:18Z 2021-09-05 2016-02 1352-2310 https://pubs.kist.re.kr/handle/201004/124445 This study presents an indoor-to-outdoor particle concentration ratio (IOR) model for improved estimates of indoor exposure levels. This model is useful in epidemiological studies with large population, because sampling indoor pollutants in all participants' house is often necessary but impractical. As a part of a study examining the association between air pollutants and atopic dermatitis in children, 16 parents agreed to measure the indoor and outdoor PM10 and PM2.5 concentrations at their homes for 48 h. Correlation analysis and multi-step multivariate linear regression analysis was performed to develop the IOR model. Temperature and floor level were found to be powerful predictors of the IOR. Despite the simplicity of the model, it demonstrated high accuracy in terms of the root mean square error (RMSE). Especially for long-term IOR estimations, the RMSE was as low as 0.064 and 0.063 for PM10 and PM2.5, respectively. When using a prediction model in an epidemiological study, understanding the consequence of the modeling error and justifying the use of the model is very important. In the last section, this paper discussed the impact of the modeling error and developed a novel methodology to justify the use of the model. (C) 2015 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD AIR-POLLUTION RESPIRATORY SYMPTOMS BRONCHITIC SYMPTOMS CHILDREN INFILTRATION BUILDINGS ASTHMA PM2.5 Indoor-to-outdoor particle concentration ratio model for human exposure analysis Article 10.1016/j.atmosenv.2015.12.020 1 ATMOSPHERIC ENVIRONMENT, v.127, pp.100 - 106 ATMOSPHERIC ENVIRONMENT 127 100 106 scie scopus 000370770700012 2-s2.0-84949921411 Environmental Sciences Meteorology & Atmospheric Sciences Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Article AIR-POLLUTION RESPIRATORY SYMPTOMS BRONCHITIC SYMPTOMS CHILDREN INFILTRATION BUILDINGS ASTHMA PM2.5 Particulate matter Indoor-to-outdoor ratio Infiltration Modeling Regression analysis Exposure analysis