Diagnostic performance of the Cho/Cr ratio, Cho/NAA ratio, and lip-lac grade
| P Valuea | AUC | Cutoff Value | Sensitivity (%) | Specificity (%) | |
|---|---|---|---|---|---|
| Comparison of all PCNSLs and TDLs | |||||
| Cho/Cr ratio | .000 | 0.849 (0.739, 0.926) | 2.58 | 75.0 (59.7, 86.8) | 81.0 (58.1, 94.4) |
| Cho/NAA ratio | .000 | 0.885 (0.782, 0.951) | 1.73 | 88.6 (75.4, 96.2) | 76.2 (52.8, 91.7) |
| Lip-lac grade | .000 | 0.801 (0.684, 0.890) | 3 | 47.7 (32.5, 63.3) | 95.2 (76.2, 99.9) |
| Comparison of atypical PCNSLs and TDLs | |||||
| Cho/Cr ratio | .003 | 0.785 (0.628, 0.897) | 2.39 | 70.0 (45.7, 88.0) | 71.4 (47.8, 88.6) |
| Cho/NAA ratio | .001 | 0.883 (0.744, 0.962) | 1.73 | 90.0 (68.3, 98.5) | 76.2 (52.8, 91.7) |
| Lip-lac grade | .005 | 0.745 (0.585, 0.868) | 3 | 35.0 (15.4, 59.2) | 95.2 (76.2, 99.9) |
Note:—Numbers in parentheses are the 95% confidence intervals.
↵a P values represent comparison results of PCNSLs and TDLs by use of the Student t test for the Cho/Cr ratio, the Cho/NAA ratio, and the Mann-Whitney U test for the lip-lac grade.