Characteristics | Algorithm 1: Colorectal cancer codes | Â | Algorithm 2: Site-specific colorectal cancer codes | ||
---|---|---|---|---|---|
Samples (n = 249) |  | Samples (n = 100) | |||
Primary tumor location, n (%) | Â | Â | Â | Â | Â |
 Left-sided colon | 10 | (4.02) |  | 6 | (6.00) |
 Right-sided colon | 37 | (14.86) |  | 28 | (28.00) |
 Transverse colon | 23 | (9.24) |  | 10 | (10.00) |
 Rectum | 137 | (55.02) |  | 50 | (50.00) |
 Unknown | 42 | (16.87) |  | 6 | (6.00) |
Degree of differentiation, n (%) | Â | Â | Â | Â | Â |
 Poorly differentiated | 6 | (2.41) |  | 3 | (3.00) |
 Moderately differentiated | 89 | (35.74) |  | 37 | (37.00) |
 Well-differentiated | 57 | (22.89) |  | 27 | (27.00) |
 Unknown | 97 | (38.96) |  | 33 | (33.00) |
Cancer stage, n (%) | Â | Â | Â | Â | Â |
 0 | 12 | (4.82) |  | 4 | (4.00) |
 I | 44 | (17.67) |  | 18 | (18.00) |
 II | 37 | (14.86) |  | 21 | (21.00) |
 III | 32 | (12.85) |  | 12 | (12.00) |
 IV | 53 | (21.29) |  | 25 | (25.00) |
 Unknown | 71 | (28.51) |  | 20 | (20.00) |