We obtained the following calculation formulas for the proposed activity scores, corresponding to Crohn’s disease (Equation (1)) and ulcerative colitis (Equation (2)), using only the linear component of the logistic regression, in order to simplify their use by the practicing physicians:(1)CD Score=CDAI1000+FC500+CRP(2)UC Score=Mayo score4+FC100+CRP4where CD = Crohn’s disease, CDAI = Crohn’s disease activity index, CRP = C-reactive protein (mg/dL), FC = fecal calprotectin (μg/g) and UC = ulcerative colitis. Here, CRP is linked to Crohn disease.