From: Adolescent fiber intake and mammographic breast density in premenopausal women
Characteristic | Adolescent total fiber intake quartile | |||
---|---|---|---|---|
1st | 2nd | 3rd | 4th | |
(≤17.32 g/day, median 15.7) n = 183 | (17.33–20.40 g/day, median 18.9) n = 184 | (20.41–23.37 g/day, median 21.6) n = 190 | (>23.37 g/day, median 26.5) n = 186 | |
Mean (STD) | Â | Â | Â | Â |
 Age at mammogram, years | 45.2 (4.2) | 44.9 (4.0) | 45.0 (4.1) | 44.6 (4.0) |
 BMI at mammogram | 25.9 (6.0) | 25.2 (5.6) | 25.2 (4.7) | 25.6 (6.5) |
 BMI at age 18 | 21.1 (3.0) | 20.9 (2.7) | 20.9 (2.8) | 21.3 (3.3) |
 Percent density | 40.8 (18.3) | 41.5 (17.5) | 41.2 (18.6) | 41.2 (18.0) |
 Absolute dense area, cm2 | 90.9 (48.0) | 94.3 (50.0) | 96.3 (52.0) | 94.4 (50.3) |
 Non-dense area, cm2 | 144.7 (78.4) | 141.9 (76.8) | 147.5 (78.2) | 146.2 (79.2) |
 Age at menarche, years | 12.4 (1.4) | 12.3 (1.4) | 12.4 (1.5) | 12.4 (1.6) |
 Caloric intake, adolescence | 2730 (848) | 2672(702) | 2857 (773) | 2800 (768) |
 Caloric intake, adulta | 1732 (453) | 1820 (445) | 1858 (467) | 1894 (531) |
 Alcohol consumption, g/day | 4.1 (6.0) | 4.6 (8.7) | 4.8 (8.5) | 4.6 (7.3) |
 Adult total fiber intake, median (range)b | 17.1 (8.1–35.3) | 18.0 (5.9–39.5) | 19.2 (8.4–48.4) | 21.6 (12.3–43.6) |
Number (%) | Â | Â | Â | Â |
 Parity/age at first child’s birth |  |  |  |  |
  Nulliparous | 31 (16.9) | 34 (18.5) | 34 (17.9) | 47 (25.3) |
  1–4 children, <25 years | 57 (31.2) | 54 (29.4) | 50 (26.3) | 42 (22.6) |
  1–4 children, 25–29 years | 60 (32.8) | 66 (35.9) | 64 (33.7) | 63 (33.9) |
  1–4 children, ≥30 years | 34 (18.6) | 28 (15.2) | 40 (21.1) | 32 (17.2) |
  ≥5 children, <25 years | 1 (0.6) | 1 (0.5) | 2 (1.1) | 2 (1.1) |
  ≥5 children, ≥25 years | 0 | 1 (0.5) | 0 | 0 |
 History of biopsy-confirmed benign breast disease | 34 (18.6) | 37 (20.1) | 33 (17.4) | 32 (17.2) |
 Family history of breast cancer | 13 (7.1) | 16 (8.7) | 17 (9.0) | 19 (10.2) |