Figure. Risk ratio for poor cognition by educational attainment and solvent exposure status.

Fully adjusted risk ratio (95% confidence interval) for poor cognitive function as predicted by lifetime cumulative exposure to 4 classes of organic solvents, stratified by educational attainment. p Values are for linear trend within educational strata. These figures indicate the differential effects of solvent exposure on cognitive function in less-educated vs more-educated individuals. (A) Cumulative chlorinated solvent exposure. (B) Cumulative petroleum solvent exposure. (C) Cumulative benzene exposure. (D) Cumulative nonbenzene aromatic solvent exposure.