Table 3 Distribution of infliximab serum trough levels
Serum infliximab before infusionBefore dose decrease (visit 1)After dose decrease (visit 3)
Low (<1 mg/litre (anti-infliximab antibody positive))6 (2)6 (4)
Intermediate (1–5 mg/litre)37
High (>5 mg/litre)95