Concomitant MTX and high CRP levels are associated with treatment continuation of anti-TNF therapy in patients with PsA regardless of joint distribution. The positive effect of MTX was primarily linked to fewer dropouts because of adverse events.
In this observational study of patients with established RA, gender did not predict response to anti-TNF therapy, whereas treatment with concomitant DMARDs, especially MTX and low disability were associated with good response. Choice of outcome measures may influence the predictive value of baseline features.
Response rates of first-time anti-TNF switchers are somewhat below those of anti-TNF naïve RA patients, while the markedly inferior response rates of second-time switchers suggest other therapeutic options to be considered in this situation. Identified baseline predictors of response may be useful indicators to second-line anti-TNF therapy, but vary depending on the response criteria set studied.
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