Fig. 1

The receiver operating curve of the ID-Migraine Questionnaire in the study population. The curve shows the sensitivity and specificity values according to the minimum number of positive answers for the ID-Migraine Questionnaire. Thresholds were determined according to the minimum number of positive answers to the ID-Migraine Questionnaire (0,1, 2 and 3 positive answers). 0: sensitivity: 1.00 (95% CI; 0.98–1.00); specificity: 0.00 (95% CI; 0.00–0.06). 1: sensitivity: 0.997 (95% CI; 0.98–1.00); specificity: 0.11 (95% CI; 0.05–0.22). 2: sensitivity: 0.95 (95% CI; 0.92–0.97); specificity: 0.42 (95% CI; 0.31–0.55). 3: sensitivity: 0.71 (95% CI; 0.65–0.76); specificity: 0.79 (95% CI; 0.67–0.87)