Table 1 Baseline demographic and disease characteristics
Group 1 n = 111Group 2 n = 103Group 3 n = 113Group 4 n = 118p Value
DAS, mean (SD)4.5 (0.9)4.5 (0.8)4.3 (0.9)4.3 (0.8)0.100
HAQ, mean (SD)1.4 (0.7)1.4 (0.6)1.4 (0.7)1.4 (0.7)0.999
Women, no. (%)77 (69)76 (74)72 (64)77 (65)0.387
IgM RF positive, no. (%)77 (69)65 (63)73 (65)74 (63)0.712
Symptom duration, median weeks (IQR)23 (13–53)26 (14–54)23 (15–50)23 (13–45)0.819
Total SHS, median (IQR)3.5 (2–9)5.0 (2–8)3.0 (2–8)4.0 (1–8)0.770
Age, mean (SD) years54 (13)54 (13)55 (13)54 (14)0.965
  • DAS, disease activity score (44 joint count); HAQ, Health Assessment Questionnaire; IQR, interquartile range; RF, rheumatoid factor; SHS, Sharp-van der Heijde Score.