Abatacept in rheumatoid arthritis: survival on drug, clinical outcomes, and their predictors-data from a large national quality register.

effects on abatacept discontinuation (Table 2 ). Results were similar in sensitivity analyses including all covariates or all covariates with p < 0.10 in the univariate models, with and without exclusion of covariates due to collinearity, except that the association between MTX and discontinuation did not reach statistical significance in the model that did not exclude covariates based on multicollinearity (see Additional file 1 : Table S1 and S2).

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