Table 3.
Morphometric parameters of the ossification center of vertebra C4
| Age (weeks) | n | Vertebral body | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Transverse diameter (mm) | Sagittal diameter (mm) | Cross-sectional area (mm2) | Volume (mm3) | ||||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | ||
| 17 | 1 | 1.60 | 1.32 | 3.70 | 4.67 | ||||
| 18 | 3 | 1.91 | 0.07 | 1.51 | 0.07 | 3.23 | 0.21 | 4.50 | 0.64 |
| 19 | 8 | 1.89 | 0.18 | 1.70 | 0.06 | 2.81 | 0.42 | 4.61 | 0.94 |
| ↓ (P < 0.001) | ↓ (P < 0.001) | ↓ (P < 0.001) | ↓ (P < 0.001) | ||||||
| 20 | 4 | 2.30 | 0.35 | 1.86 | 0.31 | 3.93 | 0.75 | 5.23 | 0.94 |
| 21 | 4 | 2.61 | 0.20 | 2.50 | 0.08 | 5.43 | 0.34 | 7.61 | 0.21 |
| 22 | 4 | 2.81 | 0.28 | 2.32 | 0.15 | 5.10 | 0.45 | 7.41 | 0.23 |
| ↓ (P < 0.01) | ↓ (P < 0.05) | ↓ (P < 0.05) | ↓ (P < 0.001) | ||||||
| 23 | 5 | 2.63 | 0.31 | 2.29 | 0.15 | 4.48 | 1.19 | 6.52 | 1.55 |
| 24 | 9 | 3.09 | 0.39 | 2.52 | 0.28 | 6.62 | 1.06 | 9.14 | 1.46 |
| 25 | 1 | 3.18 | 2.30 | 5.80 | 8.28 | ||||
| ↓ (P < 0.01) | ↓ (P < 0.01) | ↓ (P < 0.001) | ↓ (P < 0.01) | ||||||
| 26 | 2 | 3.15 | 0.68 | 2.99 | 0.10 | 6.75 | 3.18 | 9.78 | 0.88 |
| 27 | 6 | 3.18 | 0.49 | 2.81 | 0.14 | 5.70 | 1.83 | 7.45 | 1.91 |
| 28 | 2 | 4.00 | 0.01 | 2.74 | 0.01 | 8.05 | 1.06 | 9.90 | 0.42 |
| ↓ (P < 0.05) | ↓ (P < 0.001) | ↓ (P < 0.01) | ↓ (P < 0.001) | ||||||
| 29 | 2 | 3.25 | 0.03 | 3.16 | 0.01 | 8.20 | 0.14 | 10.60 | 0.14 |
| 30 | 4 | 3.74 | 0.44 | 3.37 | 0.12 | 10.23 | 3.14 | 13.45 | 3.20 |