Table 1.
Physical characteristics of the subjects
| Variables |
Model-development group (n = 52) |
Cross-validation group (n = 25) |
||
|---|---|---|---|---|
| Men ( n = 22) | Women (n = 30) | Men (n = 11) | Women (n = 14) | |
| Age, years |
62.1 ± 8.6 |
66.3 ± 5.9 |
67.5 ± 4.9 |
63.7 ± 7.7 |
| Height, cm |
166.5 ± 5.6 |
153.5 ± 4.1 |
166.5 ± 5.6 |
154.5 ± 3.0 |
| Body mass, kg |
65.0 ± 7.3 |
50.3 ± 5.8 |
67.0 ± 6.5 |
53.1 ± 4.9 |
| Body mass index, kg/m2 |
23.4 ± 2.1 |
21.4 ± 2.5 |
24.2 ± 2.5 |
22.2 ± 1.7 |
| Limb length, cm |
|
|
|
|
| Thigh |
37.8 ± 1.9 |
34.8 ± 1.5 |
37.9 ± 2.0 |
34.9 ± 1.5 |
| Lower leg |
37.0 ± 2.0 |
34.2 ± 1.7 |
37.1 ± 2.2 |
34.1 ± 1.6 |
| MT measurements, cm |
|
|
|
|
| Thigh anterior |
4.77 ± 0.53 |
3.84 ± 0.59 |
4.56 ± 0.64 |
3.90 ± 0.57 |
| Thigh posterior |
6.12 ± 0.60 |
4.85 ± 0.48 |
6.29 ± 0.46 |
4.98 ± 0.40 |
| Lower leg anterior |
3.09 ± 0.24 |
2.56 ± 0.17 |
3.05 ± 0.26 |
2.72 ± 0.28 |
| Lower leg posterior |
6.91 ± 0.38 |
5.75 ± 0.37 |
6.99 ± 0.61 |
5.72 ± 0.39 |
| DXA measurements total body |
|
|
|
|
| FM, kg |
12.1 ± 3.7 |
13.8 ± 3.7 |
13.1 ± 2.5 |
16.4 ± 2.8 |
| LTM, kg |
51.5 ± 4.7 |
35.7 ± 3.0 |
52.4 ± 4.9 |
35.6 ± 2.7 |
| BMC, kg |
2.2 ± 0.3 |
1.5 ± 0.2 |
2.2 ± 0.3 |
1.6 ± 0.3 |
| %FM, % |
18.2 ± 3.9 |
26.7 ± 5.0 |
19.2 ± 2.8 |
30.4 ± 3.3 |
| Right leg |
|
|
|
|
| FM, kg |
1.8 ± 0.6 |
2.5 ± 0.6 |
2.0 ± 0.6 |
3.1 ± 0.7 |
| LTM, kg | 8.7 ± 1.2 | 5.8 ± 0.6 | 8.7 ± 0.9 | 6.0 ± 0.6 |
Values are means ± SDs; thigh length, distance between the lateral condyle of the femur and the greater trochanter; lower leg length, distance between the lateral malleous of the fibula and the lateral condyle of the tibia. BMC, bone mineral content; FM, fat mass; LTM, bone-free lean tissue mass;. MT, muscle thickness; %FM, the percentage of FM in the total mass.