Table 1.
Characteristics of the analysis sample (N=539)1
| Time-varying Characteristics | Value at the Start of the MT 2,3 | Value at the End of the MT 2,4 |
|
| ||
| Age (years) | 50.7 (2.8) | 55.7 (2.8) |
|
| ||
| Body Mass Index (kg/m2) | 27.3 (6.9) | 27.7 (6.7) |
|
| ||
| Cigarette use (Y/N) | 86 (19%) | 79 (15%) |
|
| ||
| Body composition5 | ||
| Lean mass (kg) | 38.5 (7.3) | 38.2 (7.5) |
| Fat mass (kg) | 27.2 (11.9) | 28.1 (11.8) |
|
| ||
| Bone mineral density (g/cm2) | ||
| Lumbar spine | 1.069 (0.146) | 0.983 (0.155) |
| Femoral neck | 0.833 (0.137) | 0.780 (0.134) |
|
| ||
| Fixed variables | Values | |
|
| ||
| Race/ethnicity | ||
| Black | 142 (26.3%) | |
| Chinese | 75 (13.9%) | |
| Japanese | 90 (16.7%) | |
| White | 232 (43.0%) | |
|
| ||
| Body composition changes during the MT | ||
| Lean mass loss (cumulative %) | 0.70 (6.93) | |
| Fat mass gain (cumulative %) | 6.0 (19.9) | |
|
| ||
| Appendicular fracture after the MT (Y/N) | 64 (11.8%) | |
1.
Count (percentage) for categorical variables; mean (SD) for continuous variables
2.
MT: menopause transition, defined as starting 2 years before and ending 2 years after the final menstrual period (FMP), spanning the period when body composition changes most rapidly
3.
Values close to the start of the MT (first available between 2 years before FMP but not later than at the FMP)
4.
Values obtained close to the end of the MT (first available at least 2 years after but not 4 past the FMP)
5.
Body composition measured with dual energy x-ray absorptiometry