Chronic toxic encephalopathy among house painters with disability pension.

Among a group of 14 painters accorded a disability pension, 11 showed signs and symptoms of slight encephalopathy. Five of these 11 painters previously had been pensioned with a diagnosis of musculoskeletal disease, while the encephalopathy was unrecorded in the disability pension records. The combined effect of the two diseases may have caused the disability. We considered occupational solvent exposure the most probable cause of the encephalopathy in four of these five painters. This study indicates that case-referent studies based on diagnoses from disability pension registers may lead to underestimation of the risk of toxic encephalopathy.