Fig. 4.

Perioperative changes in fecal pH and concentrations of short-chain fatty acids in feces between patients with and without pseudopsia. Blue bars represent preoperative values, orange bars represent first postoperative values, and gray bars represent second postoperative values (around POD 7). The mesh pattern depicts the pseudopsia group. For each measurement timepoint, differences between patients with and without pseudopsia were compared using the t test. Asterisk shows significant differences. POD postoperative day