Table 1 Descriptive characteristics of the study population (n = 743), by quartile of adolescent total fiber intake

Mean (STD)

 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, adult^a

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 (%)

 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)