|  | Sister controls (n = 228 pairs) | Unrelated controls (n = 228 pairs) | ||||
---|---|---|---|---|---|---|---|
 | Inter-quintile rangeb | Βeta (SE) | P value | Inter-quintile OR (95% CI)c | Βeta (SE) | P value | Inter-quintile OR (95% CI) |
Percent density | 10.0 - 48.1 | 0.2062 (0.0810) | 0.01 | 2.19 (1.20, 4.00) | 0.2538 (0.0648) | <.0001 | 2.62 (1.62, 4.25) |
Dense area | 11.0 - 50.6 | 0.1499 (0.0607) | 0.01 | 1.77 (1.12, 2.78) | 0.2365 (0.0510) | <.0001 | 2.46 (1.68, 3.59) |
Non-dense area | 45.1 - 136.7 | -0.1364 (0.0598) | 0.02 | 0.51 (0.28, 0.91) | -0.0142 (0.0520) | 0.78 | 0.93 (0.56, 1.55) |
Total area | 77.3 - 165.0 | -0.0591 (0.0633) | 0.35 | 0.79 (0.47, 1.31) | 0.1483 (0.0596) | 0.01 | 1.84 (1.14, 2.97) |