Table 1 Patients’ demographic data
Characteristic | UIV group (N = 20) | UIV + 1 group (N = 22) | P values |
|---|---|---|---|
Age (years) | 71.00 ± 5.16 | 71.09 ± 8.34 | 0.967 |
Age (years) (at revision) | 71.75 ± 5.22 | 74.05 ± 8.07 | 0.286 |
Gender | |||
Female | 17 | 19 | 0.900 |
Male | 3 | 3 | |
Fixed vertebrae | |||
4 | 5 | 17 | < 0.001 |
5 | 6 | 5 | |
6 | 5 | 0 | |
7 | 2 | 0 | |
9 | 2 | 0 | |
BMD (T score) | − 3.34 ± 0.97 | − 3.26 ± 0.77 | 0.766 |
BMI | 25.50 ± 3.91 | 26.07 ± 3.33, | 0.618 |
ASA score | 2.87 ± 0.56 | 2.63 ± 0.64 | |
CCI | 1.60 ± 1.05 | 1.27 ± 0.83 | 0.265 |
Interval (months) | 8.18 ± 10.06 | 35.86 ± 31.10 | |
Surgical methods | |||
Interbody fusion | |||
Yes | 11 | 9 | 0.361 |
No | 9 | 13 | |
Corrective osteotomy | |||
Yes | 5 | 0 | 0.012 |
No | 15 | 22 | |
Sacral or iliac screw | |||
Yes | 12 | 8 | 0.002 |
No | 3 | 19 | |
OVFx before surgery | |||
Yes | 9 | 4 | 0.060 |
No | 11 | 8 | |
Fall incidence between index and revision | |||
Yes | 2 | 13 | 0.001 |
No | 18 | 9 | |
Is index a revision surgery? | |||
Yes | 10 | 3 | 0.011 |
No | 10 | 19 | |
UIV | |||
T10 | 2 | 0 | 0.026 |
T12 | 5 | 1 | |
L1 | 9 | 18 | |
L2 | 4 | 3 | |
LIV | |||
L4 | 1 | 0 | 0.003 |
L5 | 7 | 19 | |
S/iliac | 12 | 3 | |