Table 1.
Distribution of foraminal stenosis by vertebral level.
| Park Grade | Total | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | |||||||
| Left | Right | Left | Right | Left | Right | Left | Right | Left | Right | |
| C3–4 | 29 (38.7) | 32 (42.7) | 33 (44.0) | 32 (42.7) | 3 (4.0) | 1 (1.3) | 10 (13.3) | 10 (13.3) | 46 (61.3) | 43 (57.3) |
| C4–5 | 28 (37.3) | 30 (40.0) | 34 (45.3) | 28 (37.3) | 6 (8.0) | 5 (6.7) | 7 (9.3) | 12 (16.0) | 47 (62.7) | 45 (60.0) |
| C5–6 | 12 (16.0) | 10 (13.3) | 24 (32.0) | 31 (41.3) | 7 (9.3) | 3 (4.0) | 32 (42.7) | 31 (41.3) | 63 (84.0) | 65 (86.7) |
| C6–7 | 29 (38.7) | 26 (34.7) | 20 (26.7) | 24 (32.0) | 5 (6.7) | 5 (6.7) | 21 (28.0) | 20 (26.7) | 46 (61.3) | 49 (65.3) |
| C7–T1 | 50 (66.7) | 59 (78.7) | 23 (30.7) | 10 (13.3) | 2 (2.7) | 1 (1.3) | 0 (0.0) | 5 (6.7) | 25 (33.3) | 16 (21.3) |
| T1–2 | 71 (94.7) | 72 (96.0) | 4 (5.3) | 2 (2.7) | 0 (0.0) | 1 (1.3) | 0 (0.0) | 0 (0.0) | 4 (5.3) | 3 (4.0) |
| Total | 219 (48.7) | 229 (50.9) | 138 (30.7) | 127 (28.2) | 23 (5.1) | 16 (3.6) | 70 (15.6) | 78 (17.3) | 231 (25.7) | 211 (23.4) |
Data in parentheses are percentages.