Table 1 Demographic, clinical, and immunologic features of 155 chinese patients with RA

Gender, male, n(%)

43 (27.74)

BMI, mean (S.D.), kg/m²

22.1 ± 3.4

Age at onset, mean (S.D.), years

45 ± 12

Disease duration, mean (S.D.), years

12 ± 2

DAS28, n(%)

 < 2.6

33(21.3)

 2.6 ~ 3.2

44(28.4)

 3.2 ~ 5.1

56(36.1)

 > 5.1

22(14.2)

Cytopenia

 Anemia (Hb < 110 g/l),n (%)

69(44.52)

 Leucopenia (< 4 × 10⁹/L), n (%)

12 (7.74)

 Thrombocytopenia (< 100 × 10⁹/L), n (%)

0(0)

 Lymphopenia (< 0.8 × 10⁹/L), n (%)

13 (8.39)

 High ALT (> 50 U/L), n (%)

0(0)

 High AST (> 35 U/L), n (%)

6(3.87)

 High TBlL (> 21 umol/L), n (%)

0(0)

 High ALP (> 125 U/L), n (%)

14(9.03)

 High GGT (> 60 U/L), n (%)

20(12.9)

 High Cr (> 104 umol/L), n (%)

0(0)

 Interstitial lung disease, n (%)

27(17.42)

Anti-CCP antibody positive, n (%) 143 (92.26)

 RF positive, n (%)

118(76.13)

 ILD, n (%)

27(17.4)