Table 1 Laboratory indicators and clinical characteristics of healthy controls and patients with rheumatoid arthritis

Number

47

47

Age (years)^a

57.13 ± 12.27

60.70 ± 10.89

Sex (M/F)

16/31

16/31

Disease duration (month)^b

1008.00 (158.40, 1872.00)

NA

Anti-CCP (U/ml)^a

40.28 ± 15.20

32.34 ± 10.86

DAS28*

4.06 ± 1.14

NA

CRP (mg/L)^b

25.14 (5.10, 73.40)

3.1 (1.00, 42.65)

ESR (mm/h)^a

61.17 ± 34.13

33.12 ± 27.18

ASO (µl/mL)^b

22.94 (11.60, 34.70)

NA

C3 (g/L)^b

1.29 (1.14, 1.50)

NA

C4 (g/L)^a

0.27 ± 0.06

NA

Swollen joints^b

6.00 (2.00, 10.00)

NA

Tender joints^b

6.00 (3.00, 10.00)

NA

ILD positive (%)

17.02%

NA