TABLE 1.
Asian | Black | Mixed | Jewish | BAME combined | Unknown | White other | White British | Presumed White European | |
---|---|---|---|---|---|---|---|---|---|
Total number | 123 | 117 | 48 | 131 | 419 | 274 | 159 | 8623 | 9056 |
Number without breast cancer | 119 | 112 | 44 | 120 | 395 | 255 | 141 | 8039 | 8435 |
Number with breast cancer | 4 | 5 | 4 | 11 | 24 | 19 | 18 | 584 | 621 |
%BC | 3.31% | 4.35% | 8.33% | 8.40% | 5.78% | 6.93% | 11.32% | 6.77% | 6.86% |
Prospective breast cancer | 2 | 1 | 1 | 8 | 12 | 10 | 10 | 256 | 276 |
% prospective BC | 1.68% | 0.90% | 2.22% | 6.25% | 2.98% | 3.77% | 6.62% | 3.08% | 3.16% |
Mean 10‐year TCDR a | 3.11% | 3.17% | 3.25% | 4.46% | 3.61% | 3.13% | 4.07% | 3.56% | 3.69% |
IQR | 1.79‐3.45 | 1.82‐4.11 | 1.83‐3.90 | 2.55‐5.44 | 1.89‐4.21 | 2.00‐3.79 | 2.28‐4.89 | 2.15‐4.41 | 2.12‐4.39 |
Expected cancers a | 3.23 | 3.04 | 1.28 | 4.85 | 12.40 | 7.18 | 5.18 | 265.99 | 278.34 |
Demographic features in those without breast cancer at sampling | |||||||||
Median age at entry | 57.1 | 57.1 | 56.8 | 61.0 | 58.4 | 62.8 | 57.8 | 59.7 | 59.8 |
IQR | 51.86‐62.07 | 51.56‐60.92 | 51.49‐62.06 | 55.24‐65.78 | 52.29‐64.08 | 57.89‐68.30 | 51.83‐63.05 | 53.91‐65.17 | 53.92‐65.27 |
BMI | 26.04 | 28.60 | 28.71 | 25.83 | 26.77 | 27.05 | 26.64 | 27.13 | 27.12 |
IQR | 22.69‐28.12 | 24.39‐31.26 | 24.45‐30.67 | 22.29‐28.59 | 23.02‐28.91 | 23.57‐29.70 | 21.96‐30.03 | 23.36‐29.82 | 23.32‐29.82 |
Missing (n) | 7 (6.0%) | 21 (19.1%) | 2 (4.5%) | 2 (1.8%) | 32 (8.2%) | 21 (8.2%) | 16 (11.3%) | 379 (4.7%) | 415 (4.9%) |
Median age FFTP | 26.0 | 24.2 | 23.7 | 26.6 | 25.4 | 23.7 | 27.0 | 25.3 | 25.3 |
IQR | 23‐28.8 | 20‐27 | 19‐26 | 23‐29 | 21‐28 | 21‐26 | 23‐30 | 21‐29 | 21‐29 |
Nulliparous (n) | 15 | 13 | 13 | 19 | 60 | 26 | 30 | 1186 | 1242 |
% nulliparous | 12.82% | 11.82% | 29.55% | 15.83% | 15.35% | 10.20% | 21.28% | 14.75% | 14.72% |
Mean age at menarche | 13.1 | 13.3 | 13.3 | 12.7 | 13.1 | 13.0 | 12.6 | 12.8 | 12.8 |
IQR | 12‐14 | 12‐14 | 12‐14 | 12‐14 | 12‐14 | 12‐14 | 12‐13 | 12‐14 | 12‐14 |
Postmenopausal (n) | 81 | 64 | 27 | 92 | 264 | 207 | 88 | 5963 | 6258 |
% postmenopausal | 69.23% | 58.18% | 61.36% | 76.67% | 67.52% | 81.18% | 62.41% | 74.18% | 74.19% |
Mean age at menopause | 48.1 | 47.8 | 47.8 | 49.0 | 48.3 | 47.7 | 49.8 | 48.4 | 48.4 |
IQR | 46‐50 | 45‐51 | 46‐50 | 46‐53 | 46‐51 | 45‐51 | 48‐52 | 46‐52 | 46‐52 |
FDR breast cancer (n) | 17 | 10 | 4 | 17 | 48 | 28 | 18 | 1145 | 1191 |
% FDR | 14.29% | 9.01% | 8.89% | 13.28% | 11.91% | 10.57% | 11.92% | 13.80% | 13.67% |
Abbreviations: BC, breast cancer; BMI, body mass index; FDR, first degree relative; FFTP, first full‐term pregnancy; IQR, interquartile range; TCDR, Tyrer Cuzick density residual.
Only includes prospective cancers not women sampled after breast cancer.