Fig. 4

Gastrointestinal symptoms. (A) Estimated means and 95% confidence intervals for Frequency Scale for Symptoms of Gastroesophageal reflux disease (FSSG) score. (B) Proportion of patients with FSSG score ≥ 8. *P < 0.05 between the two groups. CZP: certolizumab pegol; MTX: methotrexate