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Table 3 Correlation between worsening of radiographic Sharp score and mean serial anti-CCP2 concentration or baseline anti-CCP2 concentration

From: Serial determination of cyclic citrullinated peptide autoantibodies predicted five-year radiological outcomes in a prospective cohort of patients with early rheumatoid arthritis

Sharp score Mean anti-CCP2 concentration Δ(M0 + M12 + M36)/3 Anti-CCP2 concentration baseline (M0)
  r (95% CI) Pa r (95% CI) Pa
Erosions 0.264 (0.06–0.44) 0.008 0.196 (-0.007–0.383) 0.052
Joint space narrowing 0.204 (0.002–0.392) 0.042 0.147 (-0.057–0.340) 0.145
Total 0.238 (0.037–0.421) 0.017 0.182 (-0.02–0.372) 0.069
  1. The serial anti-CCP2 concentration is the mean of three determinations. aSpearman test. CI, confidence interval; M0, month 0; M12, month 12; M36, month 36; r, correlation.
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