Table 1.

Baseline characteristics of patients (n = 112) with both radiographs and Health Assessment Questionnaire score available at 10 years

Characteristic
Female	90 (80.3%)
Age (years)	50.4 ± 12.6
Disease duration (month)	3.9 ± 2.8
Pain on a VAS (mm)	54.8 ± 22.9
Morning stiffness (minutes)	90.1 ± 80.2
Swollen joints	8.9 ± 5.8
Ritchie index score	17.3 ± 8.5
DAS	4.0 ± 0.7
Extra-articular manifestations	11 (9.8%)
ESR (mm)	37.6 ± 26.7
CRP level (mg/L)	29.1 ± 39.8
IgA or IgM RF positivity	81 (78.6%)
Anti-CCP ab positivity	51 (57.9%)
HLA-DRB1*04 or 01 alleles	78 (70.2%)

Data are means ± standard deviation, unless otherwise indicated.

CCP, cyclic citrullinated peptide; CRP, C-reactive protein; DAS, disease activity score; ESR, erythrocyte sedimentation rate; HLA, human leucocyte antigen; RF, rheumatoid factor; VAS, visual analogue scale.