Commentary: About that measurement problem

0.75 0.8 0.85 0.9 0.95 1 0.75 0.8 0.85 0.9 0.95 1 0.75 0.8 0.85 0.9 0.95 1 0.75 0.7 0.8 0.85 0.9 0.95 1 Figure 1 Actual output of sensitivity and specificity distributions using uniform (a), triangular (b), and trapezoidal (c and d) distributions based on 30 000 iterations. '*' Sensitivity using a uniform distribution (min 50.8, max 51.0); 'y' Sensitivity using a triangular distribution (min 50.8, mode 5 0.9, max 5 1.0); 'z' Sensitivity using a trapezoidal distribution (min 5 0.75, mode1 5 0.85, mode2 5 0.95, max 5 1.0); and '§' Specificity using a trapezoidal distribution (min 5 0.7, mode1 5 0.8, mode2 5 0.9, max 5 0.95), truncated at 0.788 to avoid negative corrected counts in the example