Multiple sclerosis, solvents, and pets. A case-referent study.
The effect of potential risk factors for multiple sclerosis was evaluated in a case-referent study that encompassed 83 cases and 467 randomized referents. Information on exposure was obtained by questionnaires that were mailed to the subjects. Mantel-Haenszel rate ratios were increased for males for occupational exposure to solvents and welding and for females for leisure time contact with dogs and caged birds. For both sexes, x-ray film examination occurred more frequently among cases than referents, possibly as an effect of early symptoms from the disease itself.
Flodin
U
U
Department of Occupational Medicine, University Hospital, Linköping, Sweden.
Söderfeldt
B
B
Noorlind-Brage
H
H
Fredriksson
M
M
Axelson
O
O
D000328:Adult; D000368:Aged; D000818:Animals; D000829:Animals, Domestic; D006801:Humans; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000209:etiology*; D012997:Solvents / Q000009:adverse effects*
D012997:Solvents