Table 2.
Characteristics of patients with PDAC in grade 1 and grade 2/3 group
| Characteristics | Training set | p value | Validation set | p value | ||
|---|---|---|---|---|---|---|
| Grade 1 (n = 29) |
Grade 2/3 (n = 70) |
Grade 1 (n = 13) |
Grade 2/3 (n = 37) |
|||
| Gender | 0.936 | 0.764 | ||||
| Male | 16 (55.2) | 38 (54.3) | 8 (61.5) | 21 (56.8) | ||
| Female | 13 (44.8) | 32 (45.7) | 5 (38.5) | 16 (43.2) | ||
| Age (years) | 57.45 ± 9.69 | 61.30 ± 10.66 | 0.096 | 61.08 ± 9.33 | 63.16 ± 9.13 | 0.485 |
| Localization of tumor | 0.090 | 0.107 | ||||
| Head-neck | 24 (82.8) | 46 (65.7) | 4 (30.8) | 16 (43.2) | ||
| Body-tail | 5 (17.2) | 24 (34.3) | 9 (69.2) | 21 (56.8) | ||
| PET/CT findings | ||||||
| SUVmax | 3.87 (2.61, 6.40) | 4.65 (3.63, 7.22) | 0.084 | 4.65 (3.72, 7.56) | 5.30 (3.74, 7.19) | 0.938 |
| SUVmean | 2.60 (2.03, 4.26) | 3.11 (2.40, 4.31) | 0.216 | 3.03 (2.68, 5.00) | 3.81 (2.46, 4.14) | 0.782 |
| MTV (ml) | 6.34 (2.21, 13.18) | 12.42 (5.12, 20.02) | 0.025 | 10.46 (3.23, 14.94) | 8.54 (2.08, 20.00) | 0.868 |
| TLG | 13.69 (6.04, 47.59) | 39.72 (17.08, 67.81) | 0.018 | 31.70 (12.54, 63.96) | 29.19 (9.69, 63.72) | 0.748 |
| Lymphatic metastasis | 0.651 | 0.264 | ||||
| Present | 18 (62.1) | 40 (57.1) | 4 (30.8) | 18 (48.6) | ||
| Absent | 11 (37.9) | 30 (42.9) | 9 (69.2) | 19 (51.4) | ||
Continuous data were expressed as mean ± standard deviation or median, with first and third quartile in parentheses. Categorical variables were expressed as numbers, with percentages in parentheses