RELIABILITY OF LIFETIME RESIDENTIAL HISTORY AND ACTIVITY MEASURES AS ELEMENTS OF CUMULATIVE AMBIENT OZONE EXPOSURE ASSESSMENT

Assessment of long-term effects of lifetime ambient oxidant pollution relies on ecological exposure assignment. Given the characteristics of ozone exposure profiles, with daily and seasonal peaks and clearly lo wer indoor concentrations, exposure misclassification is of considerab le concern. This study considered residential location, time spent out doors, and outdoors activity as major determinants of ''effective'' li fetime ozone exposure. Given the lack of a valid ''gold standard'' for these measures, we evaluated the repeatability of the retrospective a ssessment of these factors.