Table 1 Characteristics of participants (N = 182)
From: Childhood adiposity, serum metabolites and breast density in young women
Child characteristics | Mean (sd) |
|---|---|
Age (year) | 11.63 (2.13) |
BMI Z-score | 0.34 (0.93) |
Age at menarche (year) | 12.90 (1.26) |
| Â | N (%) |
|---|---|
Race | |
 White | 164 (90%) |
 Nonwhite | 18 (10%) |
Days until start of next menses at blood collection | |
 Premenarche | 134 (74%) |
 Postmenarche | |
  ≤ 14 days (luteal) | 14 (8%) |
  > 14 days (follicular) | 19 (10%) |
  Unknown | 15 (8%) |
Treatment group | |
 Intervention | 87 (48%) |
 Usual care | 95 (52%) |
Young adult characteristics | Mean (sd) |
|---|---|
Age (year) | 27.17 (1.02) |
BMI (kg/m2) | 25.39 (5.36) |
Duration hormone use (year) | 5.27 (3.65) |
| Â | N (%) |
|---|---|
Education | |
 High school or equivalent | 18 (10%) |
 Some college | 44 (24%) |
 College graduate | 95 (52%) |
 Graduate school | 25 (14%) |
Hormonal contraceptive use | |
 Current | 105 (58%) |
 Former | 66 (36%) |
 Never | 11 (6%) |
Number live births | |
 0 | 129 (71%) |
 1 | 30 (16%) |
 2+ | 23 (13%) |
Smoking status | |
 Current | 44 (24%) |
 Former | 38 (21%) |
 Never | 100 (55%) |
Breast phenotypes | Mean (sd) |
|---|---|
Breast density (%) | 27.64 (20.48) |
Dense breast volume (cm3) | 104.18 (70.64) |
Non-dense breast volume (cm3) | 413.25 (364.27) |