Table 2.
HSA Parameters in Adolescent Boys with AN and Normal-Weight Controlsa
| AN | Normal-Weight Controls | P | Pb | |
|---|---|---|---|---|
| n | 15 | 16 | ||
| Cross-sectional area, cm2 | ||||
| Narrow neck | 2.89 ± 0.64 | 3.44 ± 0.66 | .03 | .007 |
| Trochanter | 4.88 ± 1.08 | 5.78 ± 0.90 | .02 | .003 |
| Femoral shaft | 3.77 ± 0.92 | 4.29 ± 0.75 | .09 | .02 |
| CSMI, cm4 | ||||
| Narrow neck | 2.61 ± 1.03 | 3.19 ± 1.11 | NS | .04 |
| Trochanter | 13.21 ± 4.84 | 15.16 ± 4.21 | NS | .08 |
| Femoral shaft | 3.11 ± 1.18 | 3.83 ± 1.05 | .08 | .02 |
| Section modulus, cm3 | ||||
| Narrow neck | 1.47 ± 0.51 | 1.78 ± 0.50 | NS | .03 |
| Trochanter | 4.10 ± 1.22 | 4.89 ± 1.05 | .06 | .02 |
| Femoral shaft | 2.00 ± 0.62 | 2.37 ± 0.51 | .08 | .01 |
| Cortical thickness, cm | ||||
| Narrow neck | 0.18 ± 0.03 | 0.21 ± 0.04 | .02 | .009 |
| Trochanter | 0.41 ± 0.07 | 0.46 ± 0.06 | .03 | .01 |
| Femoral shaft | 0.51 ± 0.11 | 0.55 ± 0.10 | NS | NS |
| Subperiosteal width, cm | ||||
| Narrow neck | 3.29 ± 0.28 | 3.35 ± 0.37 | NS | NS |
| Trochanter | 5.53 ± 0.76 | 5.52 ± 0.41 | NS | NS |
| Femoral shaft | 2.87 ± 0.30 | 3.03 ± 0.19 | .09 | .02 |
| Endocortical width, cm | ||||
| Narrow neck | 2.93 ± 0.09 | 2.93 ± 0.39 | NS | NS |
| Trochanter | 4.72 ± 0.71 | 4.60 ± 0.37 | NS | NS |
| Femoral shaft | 1.86 ± 0.28 | 1.93 ± 0.21 | NS | NS |
| Buckling ratio | ||||
| Narrow neck | 10.33 ± 2.64 | 8.78 ± 2.37 | .09 | .08 |
| Trochanter | 7.90 ± 1.45 | 6.70 ± 0.83 | .008 | .006 |
| Femoral shaft | 3.15 ± 0.73 | 2.96 ± 0.48 | NS | NS |
| Neck shaft angle, degrees | 129.4 ± 4.4 | 132.4 ± 3.7 | .05 | .05 |
| Hip axis length | 112.7 ± 8.8 | 115.8 ± 7.2 | NS | NS |
Abbreviations: CSMI, cross-sectional moment of inertia; NS, not significant.
a
Results are shown as mean ± SD. P values < .1 are shown, and significant P values are in bold.
b
P values adjusted for age and height.