From: Childhood body size and pubertal timing in relation to adult mammographic density phenotype
 |  | Mammographic density parameters | ||
---|---|---|---|---|
 |  |  | Absolute area | |
 |  | Percent density difference, | Dense area | Non-dense |
Weight and age | Category | percentage points (95% CI)a | difference, cm2 (95% CI)a | difference, cm2 (95% CI)a |
Weight relative to peers, age 7Â years | ||||
 A: | Thinner | 5.6 (3.0, 8.4) | 6.1 (3.0, 9.3) | -10.8 (-17.7, -3.6) |
About the same | 0.0 (baseline) | 0.0 (baseline) | 0.0 (baseline) | |
Heavier | -4.1 (-7.0, -0.9) | -2.1 (-5.7, 1.8) | 17.7 (6.9, 28.9) | |
P trendb | <0.001 | <0.001 | <0.001 | |
 B: +BMI-adjusted | Thinner | 4.2 (1.8, 6.7) | 5.7 (2.7, 8.9) | -4.6 (-10.3, 1.3) |
About the same | 0.0 (baseline) | 0.0 (baseline) | 0.0 (baseline) | |
Heavier | -1.6 (-4.5, 1.5) | -1.1 (-4.8, 2.8) | 3.5 (-4.7, 12.0) | |
P trendb | <0.001 | <0.001 | 0.050 | |
Weight relative to peers, age 11Â years | ||||
 A: | Thinner | 5.0 (2.4, 7.8) | 4.3 (1.3, 7.5) | -12.8 (-19.7, -5.7) |
About the same | 0.0 (baseline) | 0.0 (baseline) | 0.0 (baseline) | |
Heavier | -7.0 (-9.3, -4.5) | -6.4 (-9.3, -3.4) | 23.3 (14.0, 32.9) | |
P trendb | <0.001 | <0.001 | <0.001 | |
 B: +BMI-adjusted | Thinner | 3.0 (0.7, 5.5) | 3.8 (0.8, 7.0) | -4.1 (-9.9, 1.9) |
About the same | 0.0 (baseline) | 0.0 (baseline) | 0.0 (baseline) | |
Heavier | -4.1 (-6.5, -1.6) | -5.4 (-8.3, -2.2) | 5.8 (-1.3, 13.1) | |
P trendb | <0.001 | <0.001 | 0.017 | |
Change in relative weight age 7 to 11Â years c | ||||
 A: | Decrease | 0.2 (-4.6, 5.6) | -0.7 (-6.3, 5.5) | 2.8 (-12.3, 19.0) |
About the same | 0.0 (baseline) | 0.0 (baseline) | 0.0 (baseline) | |
Increase | -6.3 (-9.0, -3.3) | -6.1 (-9.4, -2.6) | 24.1 (13.3, 35.3) | |
P trendb | <0.001 | 0.007 | <0.001 | |
 B: +BMI-adjusted | Decrease | 0.2 (-4.3, 5.1) | -0.3 (-5.9, 5.8) | 3.2 (-8.8, 15.9) |
About the same | 0.0 (baseline) | 0.0 (baseline) | 0.0 (baseline) | |
Increase | -2.8 (-5.6, 0.2) | -4.4 (-7.9, -0.7) | 5.9 (-2.2, 14.2) | |
P trendb | 0.11 | 0.054 | 0.36 |