Table 1 The summary of demographic data, clinical data and laboratory tests

Demographic data

 Age (years)^a

51.94 ± 13.03

56.78 ± 11.69

0.753

 Sex(male/female)^b

4/13

9/23

0.729

Clinical data

 Course(months)^c

-

12(3,57)

-

 TJC^c

-

9(4,20)

-

 SJC^c

-

6(2,18)

-

 DAS28^c

-

5.38(4.45,6.97)

-

Laboratory tests

 ESR (mm/h)^c

-

58.50(31.00,84.50)

-

 Anti-CCP (U/ml)^c

-

124.37(56.71,223.37)

-

 RF-IgM (U/ml)^c

-

288.10(59.25,300.00)

-

 RF-IgG (U/ml)^c

-

106.30(38.2,196.20)

-