Table 1 Demographic and tumor characteristics of 7582 rectal cancer patients.
Character | n | % |
|---|---|---|
Sample size | 7582 | 100.0 |
Age | ||
≤ 65 years | 5421 | 71.5 |
> 65 years | 2161 | 28.5 |
Sex | ||
Male | 4649 | 61.3 |
Female | 2933 | 38.7 |
Insurance | ||
No | 299 | 3.9 |
Yes | 7200 | 95.0 |
Unknown | 83 | 1.1 |
CEA | ||
≤ 5 ng/mL | 3047 | 40.2 |
> 5 ng/mL | 2300 | 30.3 |
Unknown | 2235 | 29.5 |
Stage | ||
II | 2752 | 36.3 |
III | 4817 | 63.5 |
Unknown | 13 | 0.2 |
T stage | ||
T0/T1/T2 | 670 | 8.8 |
T3 | 6065 | 80.0 |
T4 | 804 | 10.6 |
Unknown | 43 | 0.6 |
N stage | ||
N0 | 2671 | 35.2 |
N1 | 3787 | 49.9 |
N2 | 1111 | 14.7 |
Unknown | 13 | 0.2 |
Tumor differentiation | ||
Grade I/II | 5961 | 78.6 |
Grade III/IV | 827 | 10.9 |
Unknown | 794 | 10.5 |
Tumor size | ||
≤ 3 cm | 1811 | 23.9 |
3–5 cm | 2570 | 33.9 |
> 5 cm | 2220 | 29.3 |
Unknown | 981 | 12.9 |
Tumor deposits | ||
Negative | 6094 | 80.3 |
Positive | 961 | 12.7 |
Unknown | 527 | 7.0 |
Perineural invasion | ||
Absent | 5876 | 77.5 |
Present | 903 | 11.9 |
Unknown | 803 | 10.6 |
Number of LND | ||
< 12 | 1992 | 26.3 |
≥ 12 | 5577 | 73.5 |
Unknown | 13 | 0.2 |
Preoperative radiotherapy | ||
No | 1516 | 20.0 |
Yes | 6066 | 80.0 |
