Table 3.
Summary of Principal component analysis Results for Morphological Variables
| Variable | Eigenvectors | ||||||
|---|---|---|---|---|---|---|---|
| PC1 | PC2 | PC3 | PC4 | PC5 | PC6 | PCT | |
| BV/TV | 0.000 | 0.000 | −0.001 | 0.088 | 0.025 | 0.996 | 1.108 |
| Tb.Th | 0.003 | 0.749 | −0.662 | 0.001 | −0.005 | −0.001 | 0.085 |
| Tb.Sp | −0.997 | −0.048 | −0.059 | 0.000 | 0.000 | 0.000 | −1.104 |
| SMI | 0.077 | −0.661 | −0.747 | 0.003 | 0.000 | −0.001 | −1.329 |
| Conn.D | 0.000 | −0.004 | 0.001 | −0.563 | −0.823 | 0.07 | −1.319 |
| DA | 0.000 | 0.002 | −0.004 | −0.822 | 0.567 | 0.058 | −0.199 |
| Eigenvalue | 89334 | 2312 | 420 | 0.000 | 0.000 | 0.000 | ‐ |
| Proportion | 0.970 | 0.025 | 0.005 | 0.000 | 0.000 | 0.000 | ‐ |
| Cumulative | 0.970 | 0.995 | 1.000 | 1.000 | 1.000 | 1.000 | ‐ |
BV/TV = Bone volume over total volume; Conn.D = connectivity density; DA = degree of anisotropy; SMI = structure model index; Tb.Sp = trabecular spacing; Tb.Th = trabecular thickness.