Table 1.
Patient and tumor characteristics of total study population (n = 171). Categorical data presented as n (%) and continuous as median (IQR).
| Training cohort (n = 96) | Validation cohort (n = 75) | |||
|---|---|---|---|---|
| Malignant (n = 74) |
Benign (n = 22) |
Malignant (n = 64) |
Benign (n = 11) |
|
| Female | 34 (46%) | 14 (64%) | 34 (53%) | 6 (55%) |
| Age (years) | 61 (53-68) | 60 (51-65) | 64 (54-70) | 59 (47-68) |
| Year of 18F-FDG-PET | ||||
| 1996-2003 | 7 (9.5%) | 3 (14%) | 26 (41%) | 3 (27%) |
| 2004-2010 | 34 (46%) | 5 (23%) | 17 (27%) | 5 (46%) |
| 2011-2018 | 33 (45%) | 14 (64%) | 21 (33%) | 3 (27%) |
| Time between 18F-FDG-PET and surgery (months) | 1 (0-4) | 1 (0-3) | 1 (0-3) | 1 (0-1) |
| Tumor size (cm) | 4.1 (2.6-6.1) | 4.1 (3.0-5.6) | 5.0 (3.6-7.4) | 4.4 (3.9-5.0) |
| Tumor type | ||||
| Metastasis | 63 (85%) | - | 51 (80%) | - |
| Adrenal cortical adenoma | - | 17 (77%) | - | 6 (55%) |
| Adrenal cortical carcinoma | 9 (12%) | - | 11 (17%) | - |
| Other | 2 (2.7%) | 5 (23%) | 2 (3.1%) | 5 (46%) |