Table 1b. Subject Characteristics: Distal Radius Unadjusted Means (Standard Deviations).
| Variable | Total Sample | M1 | M2 | M3 | ||||
|---|---|---|---|---|---|---|---|---|
| GYM (n=96) |
NON (n=77) |
GYM (n=26) |
NON (n=20) |
GYM (n=49) |
NON (n=31) |
GYM (n=21) |
NON (n=26) |
|
| 1/3 Area (cm2) | 2.39 (0.29) | 2.23 (0.24) | 2.11 (0.18) | 2.02 (0.19) | 2.41 (0.23) | 2.26 (0.19) | 2.71 (0.21) | 2.36 (0.23) |
| 1/3 BMC (g) | 1.41 (0.35) | 1.25 (0.27) | 1.08 (0.18) | 0.99 (0.19) | 1.41 (0.28) | 1.22 (0.19) | 1.83 (0.20) | 1.48 (0.19) |
| 1/3 aBMD (g/cm2) | 0.583 (0.084) | 0.556 (0.075) | 0.510 (0.053) | 0.489 (0.053) | 0.582 (0.070) | 0.540 (0.056) | 0.675 (0.048) | 0.627 (0.041) |
| 1/3 Width (cm) | 1.18 (0.16) | 1.10 (0.13) | 1.01 (0.10) | 0.98 (0.10) | 1.19 (0.13) | 1.11 (0.10) | 1.35 (0.11) | 1.18 (0.12) |
| 1/3 CT (cm) | 0.23 (0.03) | 0.22 (0.03) | 0.21 (0.03) | 0.20 (0.02) | 0.23 (0.03) | 0.21 (0.02) | 0.25 (0.03) | 0.24 (0.02) |
| 1/3 ED (cm) | 0.72 (0.14) | 0.67 (0.12) | 0.59 (0.09) | 0.58 (0.09) | 0.74 (0.11) | 0.70 (0.10) | 0.85 (0.12) | 0.70 (0.13) |
| 1/3 cCSA (cm2) | 1.06 (0.33) | 0.91 (0.25) | 0.74 (0.17) | 0.69 (0.18) | 1.09 (0.26) | 0.93 (0.21) | 1.42 (0.24) | 1.05 (0.25) |
| 1/3 Z (cm3) | 0.36 (0.19) | 0.27 (0.12) | 0.20 (0.08) | 0.17 (0.08) | 0.36 (0.15) | 0.27 (0.10) | 0.56 (0.15) | 0.34 (0.12) |
| UD Area (cm2) | 2.84 (0.45) | 2.70 (0.40) | 2.36 (0.28) | 2.31 (0.26) | 2.91 (0.35) | 2.66 (0.31) | 3.26 (0.29) | 3.06 (0.22) |
| UD BMC (g) | 1.18 (0.36) | 0.90 (0.23) | 0.86 (0.23) | 0.67 (0.12) | 1.17 (0.28) | 0.87 (0.17) | 1.58 (0.27) | 1.11 (0.18) |
| UD aBMD (g/cm2) | 0.406 (0.070) | 0.329 (0.047) | 0.359 (0.060) | 0.291 (0.029) | 0.399 (0.056) | 0.325 (0.033) | 0.481 (0.052) | 0.362 (0.048) |
| UD width (cm) | 1.88 (0.30) | 1.79 (0.26) | 1.56 (0.18) | 1.53 (0.17) | 1.93 (0.23) | 1.76 (0.21) | 2.16 (0.19) | 2.03 (0.15) |
| UD IBS (g2/cm4) | 0.340 (0.120) | 0.221 (0.063) | 0.265 (0.099) | 0.172 (0.035) | 0.325 (0.092) | 0.214 (0.043) | 0.468 (0.102) | 0.267 (0.068) |
Area= bone projected area; BMC= bone mineral content; aBMD= areal bone mineral density; CT= cortical thickness; ED= endosteal diameter; cCSA= cortical cross-sectional area; Z= section modulus; IBS= index of structural strength in axial compression.