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Ann Rheum Dis. Sep 1998; 57(9): 533–539.
PMCID: PMC1752741

Only high disease activity and positive rheumatoid factor indicate poor prognosis in patients with early rheumatoid arthritis treated with "sawtooth" strategy


OBJECTIVES—To investigate the prognostic significance of clinical and genetic markers on the outcome of patients with recent-onset rheumatoid arthritis (RA) treated actively with slow acting antirheumatic drugs (SAARDs).
METHODS—A total of 142 consecutive patients with early RA (median disease duration of 7 months) were treated according to the "sawtooth" strategy and prospectively followed up for an average of 6.2 years. Several clinical parameters at start as well as genetic markers were related to the functional outcome (ARA Functional class and HAQ disability score) and radiographic joint damage (Larsen's score) at the latest visit.
RESULTS—In logistic regression analysis only Mallya score (including morning stiffness, pain scale, grip strength, Ritchie's articular index, haemoglobin, and erythrocyte sedimentation rate) at baseline, and Mallya score and rheumatoid factor (RF) positivity at one year were found to be of significance with respect to the radiographic outcome of the patients. Furthermore, at the latest visit HAQ score was related to radiographic score. At baseline the mean ages of the DR4 positive patients and the patients with RA associated DR alleles were statistically significantly lower than those without the above mentioned risk factors (44 v 49, p=0.03 and 41 v 53, p=0.04, respectively). However, these genetic markers had no prognostic significance on the functional or radiographic outcome of the patients.
CONCLUSION—High clinical disease activity at baseline and RF positivity especially at one year after the institution of SAARD treatment are the best predictors of poor prognosis in early RA. However, from the clinical point of view, the disease outcome of an individual patient with early RA, cannot be predicted accurately enough by present means.

Keywords: rheumatoid arthritis; prognosis; outcome; prediction

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Selected References

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Figures and Tables

Figure 1
Larsen's score over time in the seronegative and seropositive patients followed up for a median of seven years and RF detected at baseline and at one year. Horizontal bars indicate the median values; boxes indicate the first through third quartiles. ...

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