Parathyroid Lesion Localization: Effect of Lesion Weight
| Index | Pinhole | Parallel-hole | Difference (%) | χ2 (df = 1) | Confidence interval (%) | P |
|---|---|---|---|---|---|---|
| Group 1 (lesions > 840 mg) | ||||||
| Sensitivity | 28/28 (100%) | 19/28 (68%)* | 32 | 8.4 | 15 to 49 | 0.003 |
| Specificity | 30/32 (94%) | 31/32 (97%) | 3 | 0.001 | −7 to +13 | 0.98 |
| Accuracy | 58/60 (97%) | 50/60 (83%)* | 14 | 5.1 | 4 to 24 | 0.04 |
| PPV | 28/30 (93%) | 19/20 (95%) | 2 | 0.09 | −11 to +15 | 0.76 |
| NPV | 30/30 (100%) | 31/40 (78%)* | 22 | 5.7 | 9 to 35 | 0.01 |
| Group 2 (lesions < 840 mg) | ||||||
| Sensitivity | 20/26 (77%)† | 11/26 (42%)* | 35 | 5.2 | 10 to 60 | 0.03 |
| Specificity | 23/24 (96%) | 23/24 (96%) | 0 | 0.54 | −11 to +11 | 0.51 |
| Accuracy | 43/50 (86%) | 34/50 (68%) | 18 | 3.6 | 2 to 34 | 0.06 |
| PPV | 20/21 (95%) | 11/12 (92%) | 3 | 0.17 | −15 to +21 | 0.78 |
| NPV | 23/29 (79%)† | 23/38 (61%) | 18 | 1.7 | −34 to +39 | 0.17 |