Table 1. Characteristics of study participants by ethnicity.
| Ethnic category | Caucasian | Asian | Other | All | p valuea |
|---|---|---|---|---|---|
| N | 32 | 47 | 23 | 102 | -- |
| Age (years) | 48.0±4.4 | 48.3±5.3 | 46.2±3.8 | 47.7±4.8 | 0.19 |
| BMI (kg/m2) | 26.6±5.8 | 26.5±5.6 | 31.1±5.8 | 27.5±5.9 | <0.01 |
| Age at menarche (years) | 12.9±1.6 | 11.9±1.2 | 13.3±1.9 | 12.5±1.6 | <0.001 |
| Age at first live birth (years) | 30.0±5.4 | 30.1±5.8 | 26.0±5.4 | 29.1±5.8 | 0.01 |
| Number of children (N) | 2.5±1.0 | 2.3±0.8 | 2.9±1.3 | 2.5±1.0 | 0.07 |
| Postmenopausal status (N)b | 9 | 12 | 7 | 28 | 0.89 |
| Menopausal hormone use (N) | 5 | 13 | 4 | 21 | 0.38 |
| Overweight/Obese (N)c | 9/8 | 17/8 | 7/12 | 33/28 | 0.02 |
| DXA total volume (cm3) | 819.5±521.0 | 746.6±448.2 | 1005.7±535.5 | 827.9±497.6 | 0.12 |
| total area (cm2) | 95.6±43.4 | 85.2±35.5 | 103.3±38.2 | 92.5±39.0 | 0.16 |
| FGV (cm3) | 275.9±103.7 | 259.9±112.8 | 298.6±102.3 | 273.7±107.7 | 0.37 |
| %FGV | 40.4±14.0 | 40.1±15.3 | 33.9±11.8 | 38.8±14.3 | 0.18 |
| Mammographic PD CC view | 30.9±19.6 | 35.8±17.4d | 25.5±16.2 | 31.9±18.2 | 0.08 |
| ML view | 29.8±18.4 | 29.9±15.6d | 23.3±13.5 | 28.3±16.2 | 0.23 |
a
p value based on analysis of variance or chi-square test
b
Last menstrual period more than one year ago; one woman had missing data.
c
Overweight: BMI 25-30 kg/m2; Obese: BMI ≥30 kg/m2
d
N=46; one film could not be located.