PRTN3 and rheumatoid arthritis: The characteristics of RA disease entities were not obviously different among groups except for baseline disease activity (DAS28-ESR) (p < 0.001), three-year mean DAS28-ESR (p = 0.014), rate of positive RF (p = 0.001), rate of positive ACPA (p = 0.002), baseline glucocorticoid exposure (p < 0.001), and rate of cumulative exposure to glucocorticoids (p = 0.001).