1.
Demographic and clinical characteristics of patients with ypT0 rectal cancer (N=59)
| Variables | n (%) |
| CEA, carcinoembryonic antigen; NCRT, neoadjuvant chemo-radiotherapy; BT, blood transfusion; IQR, interquartile range. | |
| Sex | |
| Male | 38 (64.4) |
| Female | 21 (35.6) |
Age (
 ) (year)
|
55.0±12.0 |
Distance from anal verge (
 ) (cm)
|
4.4±2.3 |
Tumor diameter (
 ) (cm)
|
4.3±1.5 |
CEA (
 ) (ng/mL)
|
7.5±10.8 |
| >5 | 19 (32.2) |
| T status before treatment | |
| cT2 | 3 (5.1) |
| cT3 | 46 (78.0) |
| cT4 | 10 (16.9) |
| N status before treatment | |
| cN– | 11 (18.6) |
| cN+ | 48 (81.4) |
| Treatment regimens before surgery | |
| Radiotherapy and capecitabine | 26 (44.1) |
| Radiotherapy and capecitabine
with oxaliplatin |
33 (55.9) |
| Interval between NCRT and
surgery (weeks) |
|
| <6 | 11 (18.6) |
| 6–8 | 23 (39.0) |
| >8 | 25 (42.4) |
| Perioperative BT | 10 (16.9) |
BT volume (
 ) (IU)
|
3.50±0.85 |
| Tumor differentiation | |
| Good | 2 (3.4) |
| Moderate | 22 (37.3) |
| Poor | 11 (18.6) |
| Unknown | 24 (40.7) |
| Harvested lymph nodes [median (IQR)] | 12 (9–16) |
| Adjuvant chemotherapy | |
| Yes | 27 (45.8) |
| No | 32 (54.2) |