Table 6. Selected cutoff points and their diagnostic indices for differentiating malignant tumors from other benign lesions after deleting lesions with maximum intensity projection mean equal or greater than 116.
| Variable and its cutoff point | TP, FN, TN, FP |
Sen % [95% CI] |
Spec % [95% CI] |
PPV % [95% CI] |
NPV % [95% CI] |
PLR [95% CI] |
NLR [95% CI] |
Accuracy % [95% CI] |
|---|---|---|---|---|---|---|---|---|
| MIP mean by MIP SD ≤ 500 | 10, 0, 7, 6 |
100 (69–100) |
54 (25–81) |
63 (35–85) |
100 (59–100) |
2.2 (1.2–3.9) |
—— | 74 (52–90) |
| TTP ≤ 30 | 9, 1, 10, 3 |
90 (56–99) |
77 (46–95) |
75 (43–95) |
91 (59–99) |
3.9 (1.4–10.7) |
7.7 (1.2–50.6) |
83 (61–95) |
| MIP SD ≤ 3.2 | 6, 4, 12, 1 |
60 (26–88) |
92 (64–99) |
86 (42–99) |
75 (48–93) |
7.8 (1.1–54.8) |
2.3 (1.1–5) |
78 (56–93) |
| MIP mean by MIP SD ≤ 170 | 3, 7, 13, 0 |
30 (7–65) |
100 (75–100) |
100 (29–100) |
65 (41–85) |
——– | 1.4 (0.95–2.1) |
70 (47–87) |
Abbreviations: CI, confidence interval; MIP, maximum intensity projection; MT, malignant tumor; SD, standard deviation; TP, true negative; FN, false negative; TN, true negative; FP, false positive; Sen, sensitivity; Spec, specificity; PPV, positive predictive value; NPV, negative predictive value; PLR, positive likelihood ratio; NLR, negative likelihood ratio.