Fig. 1 | Scientific Reports

Fig. 1

From: Prevalence and aggravation of cervical spine instabilities in rheumatoid arthritis during over 10 years: a prospective multicenter cohort study

Fig. 1

Number of outpatients, fulfilling the American Rheumatism Association 1958 criteria for “classical” or “definite” RA, enrolled at baseline and prospectively followed as outpatients, patients undergoing cervical spine surgery, dead patients, or patients lost to follow-up at > 5 and > 10 years. RA rheumatoid arthritis, SD standard deviation.

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