Predicting the outcome of rheumatoid arthritis. A Soviet-Finnish co-operative study.

The prognostically important signs and symptoms in the early stage of rheumatoid arthritis were studied in 136 patients selected and treated in Moscow and in 139 patients in Heinola, Finland. The follow-up time was 3 years. The outcome was poor in patients with early signs of radiological destruction in the joints, with rheumatoid factor in serum, with early functional disability or deficient flexion of the fingers, with multiple affliction of the finger, metatarsophalangeal or wrist joints, with marked morning stiffness, and with CRP in the serum. The age of the patients did not influence the outcome in Moscow, whereas in Heinola the mean age was higher in patients with a poor outcome. Despite the marked differences in the therapeutic methods and the outcome for patients, the prognostically important signs and symptoms were very similar in both centres.