An Air Quality Data Analysis System for Interrelating Effects,Standards, and Needed Source Reductions: Part 11. A Lognormal Model Relating Human Lung Function Decrease to O3 Exposure |
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| Authors: | Ralph I Larsen William F McDonnell Donald H Horstman Lawrence J Folinsbee |
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| Institution: | 1. U.S. Environmental Protection Agency, Research Triangle Park , North Carolina , USA;2. ABB Environmental Services, Inc. , Chapel Hill , North Carolina , USA |
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| Abstract: | Forced expiratory volume in 1 second (FEV1) was measured in 21 men exercising while exposed to four O3 concentrations (0.0,0.08,0.10, and 0.12 ppm). A lognormal multiple linear regression model was fitted to their mean FEV1 measurements to predict FEV1 percent decrease as a function of O3 concentration and exposure duration. The exercise level used was probably comparable to heavy manual labor. The longest O3, exposure studied was 6 h. Extrapolating cautiously to an 8-h workday of heavy manual labor, the model predicts that O3 concentrations of 0.08, 0.10, and 0.12 ppm would decrease FEV1 by 9,15, and 20 percent, respectively. |
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