Table 2 Performance of MPD, TPW, OPW, Internal height and Isthmus height for evaluating acceptable and unacceptable screws
Parameter | MPD | TPW | OPW | Internal height | Isthmus height |
|---|---|---|---|---|---|
AUC | 0.992 | 0.949† | 0.969 | 0.885† | 0.941† |
95% CI | 0.985, 0.999 | 0.907, 0.990 | 0.944, 0.994 | 0.834, 0.936 | 0.909, 0.974 |
Sensitivity (%) | 95.1 (252/265) | 87.9 (233/265)† | 95.5 (253/265) | 80.8 (214/265)† | 87.2 (231/265)† |
Specificity (%) | 100.0 (39/39) | 94.9 (37/39) | 87.2 (34/39)† | 84.6 (33/39)† | 92.3 (36/39) |
PPV (%) | 100.0 (252/252) | 99.1 (233/235) | 98.1 (253/258) | 97.3 (214/220) | 98.7 (231/234) |
NPV (%) | 75.0 (39/52) | 53.6 (37/69) | 73.9 (34/46) | 39.3 (33/84) | 51.4 (36/70) |
Youden index J | 0.951 | 0.828 | 0.826 | 0.885 | 0.79 |
Criterion (mm) | 4.78 | 4.44 | 4.37 | 4.22 | 5.59 |