Characteristics | Training cohort | p | Validation cohort | p | ||
---|---|---|---|---|---|---|
Non-pCR (N = 93) | pCR (N = 20) | Non-pCR (N = 53) | pCR (N = 11) | |||
Age (yr) | Â | Â | .569 | Â | Â | .847 |
 ≤ 60 | 62 (66.7%) | 12 (60.0%) |  | 37 (69.8%) | 8 (72.7%) |  |
 > 60 | 31 (33.3%) | 8 (40.0%) |  | 16 (30.2%) | 3 (27.3%) |  |
Gender | Â | Â | .668 | Â | Â | .586 |
 Female | 28 (30.1%) | 7 (35.0%) |  | 19 (35.8%) | 3 (27.3%) |  |
 Male | 65 (69.9%) | 13 (65.0%) |  | 34 (64.2%) | 8 (72.7%) |  |
cT stage | Â | Â | .494 | Â | Â | .847 |
 III | 80 (86.0%) | 16 (80.0%) |  | 42 (79.2%) | 9 (81.8%) |  |
 IV | 13 (14.0%) | 4 (20.0%) |  | 11 (20.8%) | 2 (18.2%) |  |
cN stage | Â | Â | .197 | Â | Â | .707 |
 0 | 27 (29.0%) | 3 (15.0%) |  | 7 (13.2%) | 1 (9.1%) |  |
 1 | 66 (71.0%) | 17 (85.0%) |  | 46 (86.8%) | 10 (90.9%) |  |
cTNM stage | Â | Â | .411 | Â | Â | .512 |
 II | 27 (29.0%) | 4 (20.0%) |  | 9 (17.0%) | 1 (9.1%) |  |
 III | 66 (71.0%) | 16 (80.0%) |  | 44 (83.0%) | 10 (90.9%) |  |
MRF | Â | Â | .082 | Â | Â | .177 |
 Negative | 73 (78.5%) | 12 (60.0%) |  | 32 (60.4%) | 9 (81.8%) |  |
 Positive | 20 (21.5%) | 8 (40.0%) |  | 21 (39.6%) | 2 (18.2%) |  |
TL (cm) | Â | Â | .625 | Â | Â | .266 |
 ≤ 3 | 23 (24.7%) | 6 (30.0%) |  | 11 (20.8%) | 4 (36.4%) |  |
 > 3 | 70 (75.3%) | 14 (70.0%) |  | 42 (79.2%) | 7 (63.6%) |  |
DTVA (cm) | Â | Â | .351 | Â | Â | .549 |
 ≤ 5 | 36 (38.7%) | 10 (50.0%) |  | 19 (35.8%) | 5 (45.5%) |  |
 > 5 | 57 (61.3%) | 10 (50.0%) |  | 34 (64.2%) | 6 (54.5%) |  |
CEA (ng/mL) | Â | Â | .235 | Â | Â | .214 |
 ≤ 5 | 64 (68.8%) | 11 (55.0%) |  | 33 (62.3%) | 9 (81.8%) |  |
 > 5 | 29 (31.2%) | 9 (45.0%) |  | 20 (37.7%) | 2 (18.2%) |  |
Tumor thickness (mm) Median (Q1, Q3) | 14.00 (11.00, 17.00) | 15.50 (13.00, 21.25) | .029* | 16.00 (12.00, 18.00) | 13.00 (12.50, 18.00) | .419 |
Rad-score Median (Q1, Q3) | − 1.89 (− 2.21, − 1.56) | − 0.71 (− 1.15, − 0.42) | < .001* | − 1.95 (− 2.28, − 1.51) | − 0.54 (− 1.17, − 0.29) | < .001* |