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Fitness of occupational exposure data to inverse Gaussian distribution
Authors:Shinji Kumagai  Ichiro Matsunaga  Yukinori Kusaka  Koichi Takagi
Institution:1. Department of Occupational Health, Osaka Prefectural Institute of Public Health, Nakamichi, Higashinari-ku, Osaka 537, Japan
2. Department of Environmental Health, Fukui Medical School, Matsuoka-cho, 910-11, Fukui, Japan
3. Division of Environmental Engineering, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606, Japan
Abstract:Short-term exposure datasets of 10 workers exposed to organic solvents and daily average exposure datasets of seven workers exposed to cobalt and organic solvents were analyzed in order to clarify whether these exposure data fit an inverse Gaussian distribution. The goodness-of-fit test showed that time-weighted average (TWA) values with averaging times of 30 min, 60 min and 8 hours can be described by an inverse Gaussian distribution, but not those with averaging times of 7.5 min and 15 min.
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