Research Article
Assessment of MRI-Based Radiomics in Preoperative T Staging of Rectal Cancer: Comparison between Minimum and Maximum Delineation Methods
Table 1
Pathological characteristics of the patients.
| | Variables | | Training set | Validation set | value | | () | () |
| | Gender | Male | 94 (61.8%) | 109 (66.1%) | 0.434 | | Female | 58 (38.2%) | 56 (33.9%) | | | Age (years) | | | | 0.147 | | BMI (kg/m2) | | | | 0.397 | | Tumor location | Upper | 36 (23.7%) | 32 (19.4%) | 0.648 | | Middle | 92 (60.5%) | 105 (63.6%) | | | Lower | 24 (15.8%) | 28 (17.0%) | | | Histological type | Adenocarcinoma | 131 (86.2%) | 146 (88.5%) | 0.325 | | Mucinous adenocarcinoma | 15 (9.9%) | 17 (10.3%) | | | Signet ring cell carcinoma | 6 (3.9%) | 2 (1.2%) | | | Differentiation | High | 20 (13.2%) | 17 (10.3%) | 0.713 | | Moderate | 112 (73.7%) | 127 (77.0%) | | | Poor | 20 (13.2%) | 21 (12.7%) | | | T stage | T1 | 22 (14.5%) | 17 (10.3%) | 0.320 | | T2 | 44 (28.9%) | 51 (30.9%) | | | T3 | 74 (48.7%) | 90 (54.5%) | | | T4 | 12 (7.9%) | 7 (4.2%) | | | N stage | N0 | 94 (61.8%) | 99 (60.0%) | 0.056 | | N1 | 37 (24.3%) | 28 (17.0%) | | | N2 | 21 (13.8%) | 38 (23.0%) | | | Tumor deposit | Negative | 118 (77.6%) | 137 (83.0%) | 0.226 | | Positive | 34 (22.4%) | 28 (17.0%) | | | Lymphovascular invasion | Negative | 91 (59.9%) | 100 (60.6%) | 0.893 | | Positive | 61 (40.1%) | 65 (39.4%) | | | Perineural invasion | Negative | 106 (69.7%) | 117 (70.9%) | 0.819 | | Positive | 46 (30.3%) | 48 (29.1%) | | | Tumor budding | Negative | 114 (75.0%) | 126 (76.4%) | 0.777 | | Positive | 38 (25.0%) | 39 (23.6%) | | | CEA | Negative | 107 (70.4%) | 115 (69.7%) | 0.892 | | Positive | 45 (29.6%) | 50 (30.3%) | | | CA19-9 | Negative | 126 (82.9%) | 126 (76.4%) | 0.150 | | Positive | 26 (17.1%) | 39 (23.6%) | |
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BMI: body mass index; CEA: carcinoembryonic antigen; CA19-9: carbohydrate antigen 19-9. Preoperative blood samples. |
