| n (%) | Total |
1-level stenosis | C2-3: 4 (6.1) | 24 (36.9) |
C3-4: 10 (15.3) | ||
C4-5: 3 (10.7) | ||
C5-6: 4 (6.1) | ||
C6-7: 2 (3) | ||
C6: 1 (1.5) | ||
2-level stenosis | C2-4: 1 (1.5) | 21 (32.3) |
C3-5: 9 (13.8) | ||
C4-6: 4 (6.1) | ||
C5-7: 6 (9.2) | ||
C3-4, C6-7: 1 (1.5) | ||
3-level stenosis | C2-5: 2 (3.1) | 12 (18.5) |
C3-6: 9 (13.8) | ||
C4-7: 1 (1.5) | ||
4-level stenosis | C2-6: 1 (1.5) | 8 (12.3) |
C3-7: 6 (9.2) | ||
C4-6: 1 (1.5) |