Table 3 Radiographic measures of cervical spine stratified by sex and age strata.
Radiographic measures | |||||
|---|---|---|---|---|---|
Age strata | Diameter of cervical spinal canal (mm) | KL grade % (N) | Anterior spondylolisthesis | Posterior spondylolisthesis | |
≥3 | ≥4 | (%) | (%) | ||
Men | |||||
  Overall | 14.8 ± 1.3 | 80.3 (256) | 53.9 (172) | 6 | 13.2 |
  <50 | 15.2 ± 1.3 | 38.9 (14) | 16.7 (6) | 0 | 5.6 |
  50–59 | 14.8 ± 1.7 | 80.7 (46) | 38.6 (22) | 0 | 8.8 |
  60–69 | 14.9 ± 1.2 | 81.5 (53) | 52.3 (34) | 6.2 | 12.3 |
  70–79 | 14.8 ± 1.2 | 85.4 (76) | 67.4 (60) | 10.1 | 18 |
  ≥80 | 14.4 ± 1.1 | 93.1 (67) | 69.4 (50) | 8.3 | 15.3 |
Women | |||||
  Overall | 14.1 ± 1.2 | 79.7 (510) | 48.1 (308) | 6.3 | 8.9 |
  <50 | 14.5 ± 1.3 | 52.3 (45) | 17.4 (15) | 3.5 | 1.2 |
  50–59 | 14.4 ± 1.3 | 78.4 (91) | 41.4 (48) | 2.6 | 9.5 |
  60–69 | 14.1 ± 1.1 | 79.7 (126) | 51.3 (81) | 4.4 | 9.5 |
  70–79 | 13.9 ± 1.1 | 86.1 (142) | 57.6 (95) | 9.7 | 10.3 |
  ≥80 | 13.8 ± 1.0 | 92.2 (106) | 60.0 (69) | 9.6 | 11.3 |
