An Air Qualify Data Analysis System for Interrelating Effects, Standards, and Nneeded Source Reductions: Part 11. A Lognormal Model Relating Human Lung Function Decrease to O3 Exposure

Abstract

Forced expiratory volume in 1 second (FEV1) was measured in 21 men exercising while exposed to four 03 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. © 1991, Air & Waste Management Association.