Variablea | Cases of cancer (n = 252) | Controls (n = 252) |
---|---|---|
Hypothesised risk factors | Â | Â |
   Absolute breast volume FA (ml; median (IQR)) | 63.17 (88.54) | 52.99 (68.38) |
   Relative breast volume FA (%; median (IQR)) | 2.70 (3.63) | 2.49 (2.91) |
Other potential risk factors/confounders | Â | Â |
   BMI (n = 503; mean (SD)) | 23.8 (3.11) | 23.9 (3.22) |
   Height (cm; mean (SD)) | 161.7 (6.10) | 159.7 (5.88) |
   Age at menarche (years; n = 503; mean (SD)) | 13.0 (1.61) | 13.6 (1.68) |
   Age at 1st pregnancy (years; n = 400; mean (SD)) | 25.4 (4.19) | 23.9 (4.31) |
   Number of pregnancies (n = 503; median (IQR)) | 2 (2) | 2 (2) |
   Family history | 68 (27%) | 32 (13%) |
   Mean breast volume (ml; median (IQR)) | 569 (388) | 582 (370) |
   Parenchyma type: right breast |  |  |
N1 | 21 (8%) | 54 (21%) |
P1 | 42 (17%) | 33 (13%) |
P2 | 65 (26%) | 40 (16%) |
DY | 124 (49%) | 125 (50%) |
   Parenchyma type: left breast |  |  |
N1 | 21 (8%) | 55 (22%) |
P1 | 42 (17%) | 33 (13%) |
P2 | 65 (26%) | 43 (17%) |
DY | 124 (49%) | 121 (48%) |
   Menopausal status (n = 482) |  |  |
Pre | 99 (41%) | 76 (32%) |
Peri | 44 (18%) | 49 (20%) |
Post | 100 (41%) | 114 (48%) |
   Age at menopause (years; n = 212; median (IQR)) | 50 (4) | 47 (6) |