7.

Forest plot showing sensitivity and specificity of basal and stimulated reported calcitonin testing cut‐off values (range basal calcitonin 4.6 pg/mL to 35 pg/mL, range stimulated calcitonin 50 pg/mL to 100 pg/mL). (TP: true positive, FP: false positive, FN: false negative, TN: true negative, bCT: basal calcitonin, sCT stimulated calcitonin).# Gender‐specific cut‐off value was used (females: 4.6 pg/mL; males 11.5 pg/mL). * Two different assays with different cut‐off values were used during the study period.