GAST and irritable bowel syndrome: The immunoreactivity intensities of gastrin were 130.8±0.8, 134.6±1.0, 139.3±1.3, 129.7±0.9 and 133.7±1.7 in the control, IBS-total, IBS-D, IBS-M and IBS-C groups, respectively, with statistically significant differences between all groups (P=0.0001).