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. 2016 Aug 18;11(8):e0161141. doi: 10.1371/journal.pone.0161141

Table 1. Characteristics of the patients with RA included in the study.

Feature n (%)
Gender (women) 399 (76.7)
Age of disease onset, median (IQR) years 48.6 (35.8–57.2)
Duration of follow-up, median (IQR) years 12.1 (5.3–20.7)
Ever smokers 97 (20.3)
Erosions 325 (65.7)
anti-CCP positive 334 (64.2)
RF positive 301 (60.2)
Shared epitope, carrier 299 (57.5)
PTPN22, carrier 137 (26.5)