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  • Title: An epidemiologic investigation of forced expiratory volume at 1 second and respiratory symptoms among employees of a toluene diisocyanate production plant.
    Author: Olsen GW, Shellenberger R, Bodner KM, Flores GH, Emmitte JA, Bond GG, Saunders JH.
    Journal: J Occup Med; 1989 Aug; 31(8):664-7. PubMed ID: 2547915.
    Abstract:
    Pulmonary function tests were done and compared to current and past potential exposure levels of toluene diisocyanate (TDI) for 57 TDI manufacturing workers and 89 workers not exposed to TDI or other known respiratory hazards. The average TDI plant experience was 4.1 years (standard deviation = 2.8). Routine industrial hygiene measurements have shown TDI exposure below a time-weighted average of 0.005 parts per million and a short-term exposure level of 0.02 parts per million. A certified industrial hygienist ranked department and job classification by level of potential exposure to TDI (none, low, moderate, and high). A questionnaire was administered to determine the prevalence of respiratory symptoms and smoking habits. Using backward regression analysis, cumulative pack-years of cigarette smoking and prevalence of lower respiratory symptoms were statistically significant predictors of a standardized forced expiratory volume at 1 second observed v expected difference; however, TDI exposure, whether classified as current, highest career level, cumulative, or cumulative highest-to-date, was not associated with a decline in forced expiratory volume.
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