Table 1 Participant characteristics
From: Height, adiposity and body fat distribution and breast density in young women
Descriptive characteristic | n | Mean (standard deviation) or % |
|---|---|---|
Age (years) | 174 | 27.16 (1.02) |
Duration hormone use by current and former users (years) | 163 | 5.64 (3.52) |
Number of cigarettes per day by current smokers | 40 | 8.53 (7.55) |
Body mass index z-score at 8 to 10 years old | 174 | 0.20 (0.89) |
Race | Â | Â |
   White | 156 | 89.66 |
   Nonwhite | 18 | 10.34 |
Education | Â | Â |
   High school, vocational or technical school | 18 | 10.34 |
   Some college | 39 | 22.41 |
   Bachelor degree | 92 | 52.87 |
   Graduate degree | 25 | 14.37 |
Number of full-term pregnancies | Â | Â |
   0 | 127 | 72.99 |
   1 | 28 | 16.09 |
   2 to 4 | 19 | 10.92 |
Hormone use | Â | Â |
   Never | 11 | 6.32 |
   Former | 61 | 35.06 |
   Current | 102 | 58.62 |
Smoking status | Â | Â |
   Never | 97 | 55.75 |
   Former | 37 | 21.26 |
   Current | 40 | 22.99 |
Anthropometric measures | Â | Â |
   Height (cm) | 174 | 165.09 (6.35) |
   Waist (cm) | 174 | 82.67 (12.36) |
   Body mass index (kg/m2) | 174 | 24.97 (4.82) |
DXA body composition measures | Â | Â |
   Total fat (%) | 174 | 35.40(8.80) |
   Android:gynoid fat mass ratio | 174 | 0.38 (0.12) |
Breast density measures | Â | Â |
   Percentage dense breast volume (%) | 174 | 28.15 (20.39) |
   Absolute dense breast volume (cm3) | 174 | 104.67 (71.28) |