Table 4 Receiver operating characteristic curve (ROC) analysis of displacement values and LDRs
AUC (95% CI) | Cutoff value | Sensitivity (95% CI) | Specificity (95% CI) | |
|---|---|---|---|---|
Displacement at | (mm) | |||
30 N | 0.816 (0.765–0.867) | 4.15 | 0.738 (0.655–0.807) | 0.748 (0.669–0.814) |
45 N | 0.849 (0.802–0.895) | 6.15 | 0.730 (0.647–0.800) | 0.822 (0.749–0.878) |
60 N | 0.875 (0.834–0.917) | 7.25 | 0.825 (0.750–0.882) | 0.785 (0.709–0.846) |
75 N | 0.876 (0.834–0.917) | 8.15 | 0.873 (0.804–0.920) | 0.719 (0.637–0.788) |
90 N | 0.874 (0.832–0.915) | 9.15 | 0.857 (0.786–0.908) | 0.733 (0.653–0.801) |
105 N | 0.867 (0.824–0.910) | 10.45 | 0.810 (0.732–0.869) | 0.770 (0.693–0.833) |
120 N | 0.861 (0.817–0.905) | 11.15 | 0.818 (0.741–0.875) | 0.763 (0.685–0.827) |
LDR at the interval of | (mm/N) | |||
10–120 N | 0.860 (0.814–0.906) | 0.0905 | 0.805 (0.728–0.864) | 0.778 (0.694–0.844) |
10–40 N | 0.923 (0.896–0.950) | 0.1582 | 0.804 (0.734–0.859) | 0.863 (0.801–0.907) |
40–80 N | 0.766 (0.706–0.826) | 0.0784 | 0.773 (0.694–0.837) | 0.727 (0.640–0.799) |
80–120 N | 0.664 (0.596–0.731) | 0.0633 | 0.594 (0.507–0.675) | 0.727 (0.640–0.799) |