Table 2 Characteristics of the enrolled lesions in the training and test sets
Overall | Training set | Test set | P value | |
|---|---|---|---|---|
(N = 215) | (N = 151) | (N = 64) | ||
Grade classification | 0.966 | |||
Low | 39 (18.1%) | 28 (18.5%) | 11 (17.2%) | |
High | 176 (81.9%) | 123 (81.5%) | 53 (82.8%) | |
Sex | 0.645 | |||
Female | 104 (48.4%) | 71 (47.0%) | 33 (51.6%) | |
Male | 111 (51.6%) | 80 (53.0%) | 31 (48.4%) | |
Age (years) | 0.538 | |||
Median [Q1, Q3] | 68.0 [62.5, 74.0] | 68.0 [63.0, 75.0] | 68.0 [61.0, 72.3] | |
Hematuria | 0.783 | |||
No | 66 (30.7%) | 45 (29.8%) | 21 (32.8%) | |
Yes | 149 (69.3%) | 106 (70.2%) | 43 (67.2%) | |
Hydronephrosis | 0.729 | |||
No | 103 (47.9%) | 74 (49.0%) | 29 (45.3%) | |
Yes | 112 (52.1%) | 77 (51.0%) | 35 (54.7%) | |
Smoking | 0.218 | |||
No | 172 (80.0%) | 117 (77.5%) | 55 (85.9%) | |
Yes | 43 (20.0%) | 34 (22.5%) | 9 (14.1%) | |
History of UTUC | 0.984 | |||
No | 200 (93.0%) | 141 (93.4%) | 59 (92.2%) | |
Yes | 15 (7.0%) | 10 (6.6%) | 5 (7.8%) | |
Tumor laterality | 0.227 | |||
Left | 106 (49.3%) | 79 (52.3%) | 27 (42.2%) | |
Right | 109 (50.7%) | 72 (47.7%) | 37 (57.8%) | |
Tumor location | 0.748 | |||
Renal pelvic | 112 (52.1%) | 81 (53.6%) | 31 (48.4%) | |
Ureter | 89 (41.4%) | 60 (39.7%) | 29 (45.3%) | |
Both | 14 (6.5%) | 10 (6.6%) | 4 (6.3%) | |
Multiple lesion | > 0.999 | |||
No | 195 (90.7%) | 137 (90.7%) | 58 (90.6%) | |
Yes | 20 (9.3%) | 14 (9.3%) | 6 (9.4%) | |
Tumor volume (mm3) | 0.669 | |||
Median [Q1, Q3] | 5640 [2990, 13700] | 5260 [2850, 14000] | 6480 [3220, 13400] | |
Tumor size | ||||
X (mm) | 0.741 | |||
Median [Q1, Q3] | 22.5 [16.4, 35.8] | 22.5 [16.4, 37.5] | 22.4 [16.4, 31.4] | |
Y (mm) | 0.423 | |||
Median [Q1, Q3] | 23.9 [16.9, 35.9] | 23.6 [16.5, 35.8] | 24.5 [19.6, 35.9] | |
Z (mm) | 0.309 | |||
Median [Q1, Q3] | 36.0 [24.0, 48.0] | 36.0 [22.3, 48.0] | 38.0 [25.5, 48.3] | |
ADC value (×10− 6mm2/s) | 0.495 | |||
Median [Q1, Q3] | 1330 [1200, 1570] | 1330 [1200, 1590] | 1320 [1220, 1510] |