The mean FC level, ESR, and CRP were 857 mg/L, 37 mm/hr, and 30 mg/L inCD; 771 mg/L, 39 mm/hr, and 62 mg/L in UC; 180 mg/L,40 mm/hr, and 23 mg/L in indeterminate IBD. Here, ESR1 is linked to irritable bowel syndrome.