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Table 1 Characteristics of patients from SEER database by age

From: The prognostic significance of age in operated and non-operated colorectal cancer

  15-30 31-40 41-50 51-60 61-70 71-80 >80 P value
Characteristic (n = 1181) (n = 5333) (n = 18727) (n = 39125) (n = 53540) (n = 64642) (n = 43882)  
Site         <0.001
Colon 878 3854 13619 29335 42067 52767 36839  
% 76.1% 73.6% 73.8% 76.1% 79.8% 83.0% 85.6%  
Rectum 276 1382 4823 9194 10625 10772 6205  
% 23.9% 26.4% 26.2% 23.9% 20.2% 17.0% 14.4%  
Sex         
Male 622 2881 10188 22876 30443 32157 16326 <0.001
% 52.7% 54.0% 54.4% 58.5% 56.9% 49.7% 37.2%  
Female 559 2452 8539 16249 23097 32485 27556  
% 47.3% 46.0% 45.6% 41.5% 43.1% 50.3% 62.8%  
Surgery Resection         <0.001
Yes 1073 4874 17025 35729 48909 58248 36890  
% 90.9% 91.4% 90.9% 91.3% 91.4% 90.2% 84.1%  
No 98 416 1594 3150 4318 6017 6647  
% 8.3% 7.8% 8.5% 8.1% 8.1% 9.3% 15.2%  
Unknown 10 43 105 243 292 347 316  
% 0.8% 0.8% 0.6% 0.6% 0.5% 0.5% 0.7%  
Grade         <0.001
I/II 687 3555 13196 28331 39003 46869 30960  
% 58.2% 66.7% 70.5% 72.4% 72.8% 72.5% 70.6%  
III/IV 358 1232 3589 6649 9212 11727 8526  
% 30.3% 23.1% 19.2% 17.0% 17.2% 18.1% 19.4%  
Unknown 136 546 1942 4145 5325 6046 4396  
% 11.5% 10.2% 10.4% 10.6% 9.9% 9.4% 10.0%  
Race         <0.001
Caucasian 865 3943 14062 30358 42785 54227 38195  
% 73.2% 73.9% 75.1% 77.6% 79.9% 83.9% 87.0%  
African American 158 726 2689 5190 6144 5550 3101  
% 13.4% 13.6% 14.4% 13.3% 11.5% 8.6% 7.1%  
Others* 153 637 1864 3361 4358 4604 2458  
% 13.0% 11.9% 10.0% 8.6% 8.1% 7.1% 5.6%  
Unknown 5 27 112 216 253 261 128  
% 0.4% 0.5% 0.6% 0.6% 0.5% 0.4% 0.3%  
Histological Type         <0.001
Adenocarcinoma 833 4363 16225 34740 47536 56905 38431  
% 72.2% 82.5% 86.9% 89.0% 88.9% 88.1% 87.7%  
Mucinous/Signet-ring cancer 320 927 2440 4308 5927 7655 5384  
% 27.8% 17.5% 13.1% 11.0% 11.1% 11.9% 12.3%  
AJCC stage         <0.001
I- II 326 1857 6736 15467 23031 29743 19712  
% 27.6% 34.8% 36.0% 39.5% 43.0% 46.0% 44.9%  
III -IV 705 2828 9432 17834 22753 25328 15786  
% 59.7% 53.0% 50.4% 45.6% 42.5% 39.2% 36.0%  
Unknown 150 648 2559 5824 7756 9571 8384  
% 12.7% 12.2% 13.7% 14.9% 14.5% 14.8% 19.1%  
  1. *Including American Indian/AK Native, Asian/Pacific Islander.