From: Changes in body weight and the risk of breast cancer in BRCA1 and BRCA2mutation carriers
 | All | Premenopausal | Postmenopausal | ||||||
---|---|---|---|---|---|---|---|---|---|
Variable | Cases n = 1073 | Controls n = 1073 | P | Cases n = 817 | Controls n = 817 | P | Cases n = 256 | Controls n = 256 | P |
Weight (pounds) | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   At birth | 7.1 (1.3) | 7.1 (1.3) | 0.67 | NA | NA | NA | NA | NA | NA |
   At age 18 | 120.6 (17.2) | 122.3 (19.1) | 0.03 | 121.5 (17.1) | 122.9 (19.2) | 0.11 | 117.8 (17.3) | 120.4 (18.5) | 0.10 |
   At age 30c | 130.9 (17.3) | 131.2 (18.5) | 0.75 | 131.9 (17.1) | 132.2 (18.5) | 0.87 | 127.9 (17.4) | 128.6 (18.6) | 0.69 |
   At age 40d | 137.7 (23.4) | 137.7 (24.3) | 0.99 | 139.7 (22.8) | 138.7 (25.0) | 0.63 | 135.3 (23.9) | 136.5 (23.4) | 0.59 |
Current height (inches) | 64.2 (2.6) | 64.3 (2.6) | 0.44 | 64.3 (2.6) | 64.5 ± 2.6 | 0.50 | 63.9 ± 2.7 | 63.7 ± 2.7 | 0.10 |
Body mass indexb | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   At age 18 (kg/m2) | 20.57 (2.8) | 20.77 (3.0) | 0.10 | 20.65 (2.8) | 20.74 (3.0) | 0.52 | 20.31 (2.7) | 20.88 (2.9) | 0.03 |
   At age 30 (kg/m2)c | 22.35 (3.4) | 22.32 (3.7) | 0.88 | 22.44 (3.4) | 22.33 (3.9) | 0.56 | 22.08 (3.4) | 22.31 (3.1) | 0.43 |
   At age 40 (kg/m2)d | 23.77 (3.9) | 23.73 (3.9) | 0.88 | 24.06 (3.8) | 23.67 (4.1) | 0.26 | 23.42 (4.0) | 23.80 (3.7) | 0.29 |
Weight gain (pounds) | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   From age 18 to 30c | 10.5 (15.2) | 9.4 (17.0) | 0.14 | 10.6 (15.1) | 9.8 (18.2) | 0.35 | 10.1 (15.7) | 8.2 (13.0) | 0.23 |
   From age 30 to 40d | 9.4 (12.5) | 9.2 (13.3) | 0.82 | 10.6 (12.5) | 9.1 (15.3) | 0.23 | 7.9 (12.3) | 8.2 (10.5) | 0.23 |
   From age 18 to 40d | 18.6 (19.5) | 18.1 (20.4) | 0.71 | 19.9 (20.2) | 19.0 (22.1) | 0.61 | 17.0 (18.6) | 17.1 (18.2) | 0.98 |