Table 2

 Median infliximab titres 4 weeks after infusion (excluding 4 weeks after the first infusion) in the total cohort and stratified according to the use of immunosuppressive therapy

No ISISp Value
AZA, azathioprine; IFX, infliximab; IS, immunosuppression; IQR, interquartile range; MTX, methotrexate.
Median (IQR) IFX levels (μg/ml)2.42 (1–10.8)6.45 (3–11.6)0.065 (IS vs no IS)
Maximum IFX (μg/ml)2133.4
AZAMTX
Median (IQR) IFX levels (μg/ml)6.15 (3–11.6)5.65 (2.87–10.8)0.27 (AZA vs MTX)
Maximum IFX (μg/ml)33.431