Figure 5

The determinative power of the ${\mathbf{H}\mathbf{U}}_{\mathbf{19}}^{\mathbf{23}}$ in differentiating deceased and surviving subjects. (A) A non-parametric ROC curve. Area under the curve = 0.85, with asymptotic P = 0.005. The cutoff point was set to 15.27% - giving a sensitivity of 0.83 and a specificity of 0.78. Gray = reference line, black = empirical ROC curve. (B) An error bar chart for comparing deceased subjects and surviving subjects in terms of the proportion of pixels with 19 to 23 HU. HU, Hounsfield unit; ROC, receiver operator characteristics.