Table 1.
Study population characteristics at the DISC06 follow-up visit (N = 182)
| Characteristics | N | Mean ± SD |
| Age (years) | 182 | 27.2 ± 1.0 |
| BMI (kg/m2) | 182 | 25.4 ± 5.4 |
| BMI-z scorea | 182 | 0.23 ± 0.90 |
| Physical activity (Mets-h/week) | 182 | 310.1 ± 55.5 |
| Age at menarche (years) | 182 | 12.9 ± 1.3 |
| Duration of hormonal contraceptive use (years)b | 171 | 5.6 ± 3.5 |
| Dietary intake | ||
| During DISC06 follow-up visitc | ||
| Total energy intake (kcal/day) | 176 | 1,731.3 ± 469.9 |
| Total carbohydrates (g/day) | 176 | 214.9 ± 36.4 |
| Glycemic index (units/day) | 176 | 86.9 ± 6.6 |
| Glycemic load (units/day) | 176 | 174.5 ± 60.9 |
| Fiber(g/day) | 176 | 15.2 ± 6.4 |
| Fructose (g/day) | 176 | 19.4 ± 12.5 |
| Sucrose (g/day) | 176 | 36.7 ± 16.8 |
| During DISC trialb | ||
| Total energy intake (kcal/day) | 178 | 1,612.3 ± 348.9 |
| Total carbohydrates (g/day) | 178 | 228.9 ± 20.5 |
| Fiber(g/day) | 178 | 10.7 ± 2.5 |
| Fructose (g/day) | 178 | 25.3 ± 8.5 |
| Sucrose (g/day) | 178 | 44.0 ± 11.4 |
| N | Percentage (%) | |
| Race | ||
| White | 164 | 90 |
| Non-white | 18 | 10 |
| Education | ||
| Some college | 44 | 24 |
| Bachelor’s degree | 95 | 52 |
| Graduate degree | 25 | 14 |
| Otherd | 18 | 10 |
| Number of live births | ||
| 0 | 129 | 71 |
| > 1 | 53 | 29 |
| Family history of breast cancer | ||
| No | 171 | 96 |
| Yes | 7 | 4 |
| Hormonal contraceptive use | ||
| Never | 11 | 6 |
| Former | 66 | 36 |
| Current | 105 | 58 |
| Smoking status | ||
| Never | 100 | 55 |
| Former | 38 | 21 |
| Current | 44 | 24 |
| Alcohol consumption | ||
| Never/former | 16 | 9 |
| Current, < 3 per week | 71 | 39 |
| Current, 3-<6 per week | 33 | 18 |
| Current, 6-<10 per week | 40 | 22 |
| Current, > 10 per week | 22 | 12 |
| N | Percentage (%) | |
| Treatment assignment | ||
| Intervention | 87 | 48 |
| Usual care | 95 | 52 |
| N | Median (IQR) | |
| Breast density measures | ||
| Percent dense breast volume (%) | 182 | 24.5 (9.7–41.2) |
| Absolute dense breast volume (cm3) | 182 | 93.0 (50.0–140.3) |
| Absolute non-dense breast volume (cm3) | 182 | 298.5 (157.8–485.3) |
SD standard deviation, BMI body mass index, IQR interquartile range
a
BMI-z score at baseline during the DISC trial
b
Mean duration of hormonal use was calculated among past and current hormone users
c
Nutrients are energy-adjusted
d
Other education includes education until 8–11 years, completion of high school and vocational or technical school