Table II.
Bone measures (raw) by group and Gross Motor Function Classification System level, presented as mean (standard error of the mean); the p value is from simple linear regression
| Comparison (n=37) | GMFCS level I–II (n=17) | GMFCS level III–IV (n=20) | p | |
|---|---|---|---|---|
| Spine | ||||
| L3 vBMD (mg/cm3) | 132 (4) | 128 (7) | 121 (4) | 0.09 |
| L3 CSA (mm2) | 806 (21) | 801 (26) | 650 (24) | <0.001 |
| Tibia | ||||
| Metaphysis vBMD | ||||
| Entire metaphysis (mg/cm3) | – | 72 (5) | 52 (5) | 0.007 |
| Single slice (mg/cm3) | – | 123 (10) | 94 (9) | 0.03 |
| Midshaft geometry | ||||
| CSA (mm2) | – | 286 (19) | 185 (14) | <0.001 |
| CBA (mm2) | – | 191 (10) | 126 (8) | <0.001 |
GMFCS, Gross Motor Function Classification System; CSA, cross-sectional area; CBA, cortical bone area.