Table 3. Categorical distribution of African and European ancestry substitutiona in controls, adenomas and colorectal cancer cases included into the analysis.
| Control | Adenomas | Cancer | |
|---|---|---|---|
| n (%) | n (%) | n (%) | |
| African Ancestry | |||
| 0.01–0.09 | 110 (45.27) | 39 (34.51) | 58 (30.53) |
| 0.10–0.19 | 58 (23.87) | 38 (33.63) | 64 (33.68) |
| 0.20–0.29 | 39 (16.05) | 24 (21.24) | 34 (17.89) |
| 0.30–0.39 | 36 (14.81) | 12 (10.62) | 34 (17.89) |
| P-valueb | 0.07 | 0.02 | |
| European ancestry substitutiona | |||
| ≤−0.30 | 55 (22.63) | 12 (10.62) | 46 (24.21) |
| −0.29 to −0.20 | 40 (16.46) | 17 (15.04) | 34 (17.89) |
| −0.19 to −0.10 | 49 (20.16) | 20 (17.7) | 39 (20.53) |
| 0–0.09 | 58 (23.87) | 22 (19.47) | 36 (18.95) |
| 0.10–0.19 | 41 (16.87) | 42 (37.17) | 35 (18.42) |
| 0.20–0.29 | 9 (3.7) | 11 (9.73) | 8 (4.21) |
| ≥0.30 | 11 (4.53) | 16 (14.16) | 10 (5.26) |
| P-valueb | 0.001 | 0.87 | |
a
European ancestry substitution=European minus Amerindian ancestry fractions.
b
P-value for χ2-test.