Network of included studies with the available direct comparisons for (A) induction and (B) maintenance of clinical remission in patients with mild-moderate ulcerative colitis. The size of the nodes and the thickness of the edges are weighted according to the number of studies evaluating each treatment and direct comparison, respectively. In panel A, number corresponds to 1: Placebo/Control, 2: Low-dose mesalamine (<2g), 3: Standard dose mesalamine (2–3g), 4: High-dose mesalamine (>3g), 5: Controlled ileal relelase budesonide, 6: Budesonide MMX, 7: Sulfsalazine, 8: Diazo-bonded 5-aminosalicylates (olsalazine/balsalazide), 9: Oral + Rectal 5-aminosalicylates. In panel B, number corresponds to 1: Placebo/Control, 2: Low-dose mesalamine (<2g), 3: Standard dose mesalamine (2–3g), 4: High-dose mesalamine (>3g), 5: Sulfsalazine, 6: Diazo-bonded 5-aminosalicylates (olsalazine/balsalazide), 7: Oral + Rectal 5-aminosalicylates.