Results of Linear Discriminant Analysis with Equal Prior Probabilities Based on 18F-FDG Parameters of First PET Study (1) or Second PET Study (2) or Combination of Both Studies
| Parameter | Sensitivity | Specificity | PPV | NPV | Accuracy |
|---|---|---|---|---|---|
| 1: SUV | 9/15 (60.00%) | 7/10 (70.00%) | 9/12 (75.00%) | 7/13 (54.00%) | 16/25 (64.00%) |
| 1: SUV, VB, k1, k3, FD | 9/11 (81.81%) | 3/14 (21.43%) | 9/12 (75.00%) | 10/13 (77.00%) | 19/25 (76.00%) |
| 2: SUV | 10/16 (62.5%) | 6/8 (75.00%) | 10/12 (83.33%) | 6/12 (50.00%) | 16/24 (66.70%) |
| 2: SUV, influx | 8/9 (88.90%) | 6/10 (60.00%) | 8/12 (67.00%) | 10/12 (83.30%) | 18/24 (75.00%) |
| 2: FD, k4 | 9/11 (81.81%) | 3/13 (23.00%) | 9/12 (75.00%) | 10/12 (83.30%) | 19/24 (79.20%) |
| 1 + 2: SUV | 9/14 (64.30%) | 7/10 (70.00%) | 9/12 (75.00%) | 7/12 (58.33%) | 16/24 (66.70%) |
| 1 + 2: SUV, influx | 11/14 (78.60%) | 9/10 (90.00%) | 11/12 (91.67%) | 9/12 (75.00%) | 20/24 (83.33%) |
| % change SUVmax | 8/14 (57.14%) | 6/10 (60.00%) | 8/12 (66.67%) | 6/12 (50.00%) | 14/24 (58.33%) |
Groups were defined according to histologic classification of 10% variable tumor tissue.
PPV = positive predictive value; NPV = negative predictive value.