Table 1 Variables of clinic, radiology and DECT in the training and validation cohorts
Variables | Training cohort (n = 100) | Validation cohort (n = 43) |
|---|---|---|
Clinical characteristics | ||
Gender (%) | ||
Male | 56 (56.0) | 25 (58.1) |
Female | 44 (44.0) | 18 (41.9) |
Age (mean ± SD) | 62.60 ± 10.55 | 62.49 ± 9.74 |
BMI (mean ± SD) | 22.31 ± 2.76 | 21.57 ± 3.33 |
CEA (%) | ||
Normal | 69 (69.0) | 36 (83.7) |
Elevated | 31 (31.0) | 7 (16.3) |
CA-125 (%) | ||
Normal | 61 (61.0) | 30 (69.8) |
Elevated | 39 (39.0) | 13 (30.2) |
CA-199 (%) | ||
Normal | 20 (20.0) | 7 (16.3) |
Elevated | 80 (80.0) | 36 (83.7) |
Radiological features | ||
Tumour location (%) | ||
Head and neck | 70 (70.0) | 27 (62.8) |
Body and tail | 30 (30.0) | 16 (37.2) |
CT-reported T stage (%) | ||
T1–T2 | 54 (54.0) | 23 (53.5) |
T3–T4 | 46 (46.0) | 20 (46.5) |
CT-reported regional LN status (%) | ||
Negative | 49 (49.0) | 19 (44.2) |
Positive | 51 (51.0) | 24 (55.8) |
Parenchyma atrophy (%) | ||
Negative | 63 (63.0) | 20 (46.5) |
Positive | 37 (37.0) | 23 (53.5) |
Pancreatic duct expansion (%) | ||
Negative | 32 (32.0) | 17 (39.5) |
Positive | 68 (68.0) | 26 (60.5) |
Vessels invasion (%) | ||
Negative | 72 (72.0) | 32 (74.4) |
Positive | 28 (28.0) | 11 (25.6) |
Extrapancreatic perineural invasion status (%) | ||
Negative | 33 (33.0) | 12 (27.9) |
Positive | 67 (67.0) | 31 (72.1) |
DECT quantitative parameters | ||
NIC of AP | 0.09 ± 0.04 | 0.08 ± 0.03 |
NZeff of AP | 0.68 ± 0.04 | 0.68 ± 0.05 |
λHU of AP | 1.37 ± 0.52 | 1.22 ± 0.50 |
NIC of PVP | 0.38 ± 0.11 | 0.37 ± 0.07 |
NZeff of PVP | 0.87 ± 0.05 | 0.86 ± 0.03 |
λHU of PVP | 2.30 ± 0.70 | 2.09 ± 0.54 |
ECVf (%*) | 36.08 ± 6.52 | 35.18 ± 6.69 |