Table 3.
Age-Level | BV/TV, % | Tb.Th, μm | Tb.N, mm−1 | Conn.D, mm−3 | SMI | vBMD, mg HA/mm3 | Cort.Th, μm |
---|---|---|---|---|---|---|---|
Lumbar | |||||||
Young | 21 ± 3 | 56 ± 3 | 5.2 ± 0.5 | 154 ± 32 | 1.6 ± 0.5 | 205 ± 23 | 98 ± 4 |
Old | 17 ± 5* | 57 ± 0.06 | 4.6 ± 0.7* | 105 ± 50* | 1.7 ± 0.6 | 171 ± 44* | 93 ± 11 |
Coccygeal | |||||||
Young | 25 ± 3† | 83 ± 5† | 3.5 ± 0.2† | 41 ± 8† | 1.1 ± 0.3† | 229 ± 35 | 162 ± 11† |
Old | 38 ± 5*† | 106 ± 12*† | 3.9 ± 0.3*† | 42 ± 20† | 0.04 ± 0.7*† | 365 ± 49*† | 213 ± 31*† |
Values are means ± SD. BV/TV, bone volume/tissue volume; Tb.Th, trabecular thickness; Tb.N, trabecular number; Conn.D, connectivity density; SMI, structure model index; vBMD, volumetric bone mineral density; HA, hydroxyapatite; Cort.Th, cortical thickness.
Young vs. old of same vertebral level,
lumbar vs. coccygeal of same age: P < 0.05.