Abstract
An unselected group of 360 chronic mental hospital women patients over the age of 40 has been examined for evidence of rheumatoid arthritis. Five had rheumatoid arthritis, whereas the finding of 11-14 (3-4%) was anticipated. Among the schizophrenic group of 130 the incidence was either 0 or 0.8%. These findings are discussed along with possible explanations.

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