Univariate analyses
The variables were entered in univariate logistic regression classifier to predict revision ESS after baseline ESS. Of the continuous variables, the highest AUC values were for the number of visits 12, 6, and 3 months after the baseline visit (AUC = .76, .69, .65, respectively, Table 2). The next highest AUC values were for the time between baseline visit and baseline ESS (AUC = .59) and, visit frequency from baseline visit to baseline ESS (AUC = .59). Of the categorical variables, the highest AUC values were for CRSwNP (AUC = .65), asthma (AUC = .65), immunodeficiency or its suspicion (AUC = .61), allergy (AUC = .61) and NERD (AUC = .60). The coefficients of the continuous variables were positive with one exception, which indicated that a higher visit number/frequency and, a shorter time between baseline visit and baseline ESS, increased revision ESS probability (Table 2)