| Correlation of IgM-RF levels at baseline# | P 1 | IgM-RF positive at baseline (n = 255)$ | IgM-RF negative at baseline (n = 280)$ | P 2 |
---|---|---|---|---|---|
IgM-RF level at baseline (IU/ml), median (IQR) | x | Â | 100 (60-200) | 10 (6-14) | Â |
IgM-RF level at 1 year (IU/ml), median (IQR) | x | Â | 51 (23-97) | 9 (5-10) | Â |
DAS28 at baseline | 0.11 | 0.01 | 4.88 (1.19) | 1.66 (1.29) | 0.01 |
HAQ at baseline | 0.01 | 0.79 | 1 (0.5-1) | 0.94 (0.5-1.5) | 0.49 |
SHS at baseline | 0.11 | 0.02 | 0 (0-1) | 0 (0-0) | 0.00 |
DAS28 at 2-year follow-up | 0.17 | 0.69 | 2.92 (1.30)& | 2.84 (1.23)& | 0.58 |
HAQ at 2-year follow-up | 0.04 | 0.41 | 0.5 (0-0.88) | 0.38 (0-0.88) | 0.43 |
SHS at 2-year follow-up | 0.22 | 0.00 | 2 (0-9) | 0 (0-4) | 0.00 |