Cervical cord measurement
| Intervertebral level | No of patients | APD3-151 mean (SD) (range) mm | CA‡ mean (SD) (range) mm2 |
|---|---|---|---|
| +2 | 19 | 6.8 (1.3) (3.8-9.5) | 70.7 (13.6) (46.5-97.8) |
| +1 | 42 | 6.4 (1.2) (2.6-8.5) | 70.0 (16.1) (25.9-100) |
| 0 | 42 | 3.8 (1.0)* (2.1-5.7) | 49.4 (14.2)* (17.3-89.6) |
| -1 | 42 | 5.5 (1.0) (3.4-7.8) | 63.7 (17.0) (35.5-111) |
| -2 | 40 | 6.0 (1.1) (3.5-8.5) | 64.9 (16.5) (31.6-105) |
| -3 | 23 | 6.4 (0.8) (4.6-7.9) | 67.5 (14.0) (38.2-106) |
↵3-151 APD=anteroposterior diameter measured on midsagittal T1weighted MRI. ‡ CA=cross sectional area measured on axial T1weighted MRI. * Significantly smaller APD (p⩽0.0001) and CA (p ⩽ 0.0002) than those at the remaining more caudal and rostral levels.