Table 1:
Population characteristics, including L3 bone mineral density, muscle density, fat fraction, and physical activity of 1923 MESA participants in the MESA Body Composition Ancillary Study
| All | Men | Women | |
|---|---|---|---|
| N (%) | 1923 | 973 (50.6) | 950 (49.4) |
| Age, years(SD) | 62.07 (9.72) | 63 (10) | 64 (9.5) |
| Ethnicity, n(%) | |||
| White | 769 (39.9) | 409 (42) | 360 (37.9) |
| Chinese | 256 (13.3) | 135 (13.9) | 121 (12.7) |
| Black | 399 (20.7) | 179 (18.4) | 220 (23.2) |
| Hispanic/Latino | 499 (25.9) | 250 (25.7) | 249 (26.2) |
| Never smoked, n(%) | 947 (49.2) | 376 (38.7) | 571 (60.2) |
| Impaired Fasting Glucose, n(%) | 635 (33) | 360 (34.9) | 280 (26.8) |
| BMI, kg/m2 (SD) | 28.2 (5.2) | 27.9 (4.4) | 28.4 (5.8) |
| Oral steroid use, n(%) | 22 (1.1) | 8 (0.8) | 14 (1.5) |
| Anti-resorptive medication use, n(%) | 243 (12.6) | 8 (0.8) | 235 (24.7) |
| Mean (SD) L3 vBMD, muscle density, and fat fraction of psoas, paraspinal, and oblique muscles groups | |||
|
| |||
| vBMD L3, mg/cm3 | 116 (40) | 120 (39) | 111 (40) |
| Total Psoas Area, sq cm | 16.4 (5.7) | 20 (5.5) | 13 (3.3) |
| Psoas Fat Fraction % | 0.07 (0.05) | 0.07 (0.05) | 0.08 (0.06) |
| Psoas Density, HU | 39 (11.3) | 41 (10.7) | 36.7 (11.6) |
| Total Paraspinal Area, sq cm | 63.1 (14.6) | 72.1 (12.7) | 53.6 (9.8) |
| Paraspinal Fat Fraction % | 0.11 (0.07) | 0.09 (0.06) | 0.13 (0.07) |
| Paraspinal Density, HU | 29.4 (14.7) | 34 (13.4) | 24.6 (14.5) |
| Total Oblique Area, sq cm | 37.7 (15.5) | 44.2 (16.1) | 31.6 (12.2) |
| Oblique Fat Fraction % | 0.11 (0.07) | 0.1 (0.06) | 0.13 (0.08) |
| Oblique Density, HU | 22.4 (13.1) | 26.4 (11.4) | 18.8 (13.6) |
| Median, 25th, and 75th percentile of self-reported exercise and work | |||
|
| |||
| Total Intentional Exercise (MET-min/week) | 742 [96, 1834] | 900 [165, 2100] | 660 [0, 1601] |
| Moderate Conditioning | 0 [0, 330] | 0 [0, 495] | 0 [0,330] |
| Vigorous Conditioning | 0 [0,0] | 0 [0, 0] | 0 [0, 0] |
| Total Conditioning | 0 [0, 495] | 0 [0, 660] | 0 [0, 483.75] |
| Moderate Work | 0 [0,900] | 0 [0,1800] | 0 [0, 450] |
| Vigorous Work | 0 [0,0] | 0 [0,0] | 0 [0,0] |
| Total Work * | 450 [0,4950] | 3038 [0, 5850] | 0 [0,4207.5] |
IFG = Impaired fasting glucose. For mean values, SD is presented in parentheses. For median values, 25th and 75th quartiles are presented in brackets.
*
Light work was not calculated