Table 2.
Descriptive statistics for predefined classifiers for endocrine resistance (n=90).
| Classifier | description | N (%) |
|---|---|---|
| FES dynSUV ≤ 1.5 | FES dynSUV = average of FES SUVmean for up to 3 lesions in the dynamic field-of-view |
24/90 (27%) |
| FES SULmean3 ≤ 1 | (see Table 1)a | 26/90 (29%) |
| any low FES/FDG | any low FES/FDG = presence of any lesion with FES SULmean ≤ 1 and FDG SUVmax > 5 |
17/88a (19%) |
| qualitative FES neg | qualitative FES neg = presence of any lesion lacking FES uptake above background (qualitative read) |
12/90 (13%) |
a
2 patients had FDG PET scan from outside sites, used to locate lesions but not for uptake quantification; to calculate SULmean3 for these patients, 3 lesions were selected at random (from 5, 8 lesions).