Table 2: Mean (SD) levels of calprotectin in IBD patients with or without IBS-like symptoms using a cutoff of <100 g/g.

Calprotectin IBS positive IBS negative value   Ulcerative colitis   <100 g/g 0.14 40.5 (36.9) 23.7 (26.4) ≥100 g/g 0.26 808.3 (353.6) 562 (446.8)   Crohn’s disease   <100 g/g 0.17 5.3 (4.6) 19.4 (16.0) ≥100 g/g <0.01 872.7 (287.7) 293.7 (191.9)

SD: standard deviation, IBD: inflammatory bowel disease, and IBS: irritable bowel syndrome.