TABLE 1.
Characteristics of the patients at baseline, according to pathologic response.
| Characteristics | All patients (N = 22) | Patients with complete pathologic response (N = 12) | Patients with noncomplete pathologic response (N = 10) | p value |
|---|---|---|---|---|
| Age, years | ||||
| Mean ± SD | 61.2 ± 12 | 59.9 ± 14.4 | 62.8 ± 8.7 | 0.59 |
| Median (range) | 65 (37–79) | 59 (37–79) | 66 (45–74) | |
| Sex, no. (%) | ||||
| Female | 7 (31.8) | 4 (33.3) | 3 (30) | 0.88 |
| Male | 15 (68.2) | 8 (66.7) | 7 (70) | |
| Tumor (%) | ||||
| T4a | 14 (63.6) | 6 (50) | 8 (80) | 0.16 |
| T4b | 8 (36.4) | 6 (50) | 2 (20) | |
| Lymph node (%) | ||||
| N1 | 6 (27.2) | 4 (33.3) | 2 (20) | 0.51 |
| N2 | 16 (72.7) | 8 (66.7) | 8 (80) | |
| Site | ||||
| Upper rectal | 9 (41) | 4 (33.3) | 5 (50) | 0.45 |
| Colon | 13 (59) | 8 (66.7) | 5 (50) | |
| Histologic type | ||||
| Adenocarcinoma | 22 (100) | 12 (100) | 10 (100) | 0.9 |
| Well differentiated | 6 (27.2) | 4 (33.3) | 2 (20) | |
| Moderately differentiated | 14 (63.6) | 6 (50) | 8 (80) | |
| Poorly differentiated | 2 (9.1) | 2 (16.7) | 0 | |