Table 1 Comparison of the characteristics of the patients between the two groups
Group | n | Gender | Age (years) | Bone mineral density (SD) | Disease course (months) | Follow-up period (months) | Open-door segments | |||
|---|---|---|---|---|---|---|---|---|---|---|
Male | Female | C3-7 | C3-6 | C4-7 | ||||||
Later mass group | 55 | 31 | 24 | 62.5 ± 7.6 | − 1.7 ± 0.6 | 14.6 ± 4.3 | 19.8 ± 5.1 | 37 | 12 | 6 |
Lamina group | 43 | 25 | 18 | 61.9 ± 7.9 | − 1.5 ± 0.4 | 13.5 ± 4.0 | 19.3 ± 5.3 | 30 | 8 | 5 |
t/χ.2 value | 0.031 | 0.381 | 1.882 | 1.295 | 0.473 | 0.156 | ||||
P value | 0.860 | 0.703 | 0.063 | 0.198 | 0.637 | 0.925 | ||||