Does benzene cause multiple myeloma? An analysis of the published case-control literature.

(12) showed a trend toward a lower risk of multiple myeloma with a greater duration of exposure to solvent/benzene, and La Vecchia et al.

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This borderline significant associa- tion of 1.3 was found when the uncertain benzene exposure category of "possible exposure" was used, while no association was found (0.8) when the more certain benzene exposure category of "probable exposure" was used.

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