Table 2.

Statistical analysis of disease duration using Mann-Whitney U test.

Disease Duration, Median yrs (interquartile range)p
SE+9 (4–15)0.62
−8 (3–15)
CCP+10 (4–16)0.005
−7 (2–12)

  • SE: shared epitope; CCP: Citric citrullinated peptide.