Table 1 Demographic data and clinical characteristics (n = 295)
Characteristics | Group 1 | Group 2 | p-value | ||
|---|---|---|---|---|---|
Mean age and distribution | 61.8 years (46 ~ 72 years) | 70.6 years (58 ~ 82 years) | 0.021 | ||
Sex ratio (F/M) | 115/67 | 74/39 | 0.792 | ||
Mean follow-up period | 14.7 years | 12.8 years | 0.211 | ||
Fusion surgery | Segment | Patients | Segment | Patients | |
1 | 78 | 3 | 65 | ||
2 | 104 | 4 | 33 | ||
5 | 10 | ||||
≥6 | 5 | ||||