Table 1 Demographic data
Parameters | Whole group | OLIF51 group | TLIF51 group |
|---|---|---|---|
No. patients | 23 | 13 | 10 |
Age | 69.4 ± 5.0 | 69.8 ± 5.0 | 68.9 ± 5.3 |
Female (%) | 87.0% | 84.6% | 90.0% |
ASA score | 1.9 ± 0.4 | 1.9 ± 0.3 | 2.0 ± 0.0 |
BMI | 25.0 ± 3.1 | 26.0 ± 3.8 | 23.6 ± 4.8 |
BMD T-score | − 2.4 ± 0.5 | − 2.4 ± 0.6 | − 2.5 ± 0.2 |
Follow-up (months) | 40.7 ± 14.6 | 29.8 ± 4.9*** | 54.8 ± 9.8 |
Fusion | OLIF, TLIF | OLIF at L1–S1 | OLIF at L1–L5, TLIF at L5–S1 |
Posterior fixation | Percutaneous | Percutaneous | Percutaneous |
No. fusion levels | 4.4 ± 0.5 | 4.4 ± 0.5 | 4.4 ± 0.5 |
No. fixation levels | 6.7 ± 1.5 | 6.8 ± 1.5 | 6.5 ± 1.0 |
Operation time (min) | 345.0 ± 50.0 | 347.9 ± 60.9 | 369.0 ± 17.4 |
EBL (ml) | 331.3 ± 109.6 | 260.7 ± 83.5*** | 423.0 ± 59.3 |
Clinical outcomes | |||
 VAS Back | |||
  Before surgery | 6.5 ± 1.5 | 6.4 ± 1.6 | 6.6 ± 1.5 |
  24 months | 2.2 ± 0.6‡ | 2.1 ± 0.6‡ | 2.3 ± 0.7‡ |
 VAS leg | |||
  Before surgery | 7.4 ± 1.2 | 7.6 ± 1.1 | 7.2 ± 1.3 |
  24 months | 1.4 ± 0.8‡ | 1.4 ± 0.8‡ | 1.3 ± 0.7‡ |
 ODI | |||
  Before surgery | 49.9 ± 7.7 | 49.7 ± 10.2 | 50.1 ± 4.2 |
  24 months | 14.6 ± 3.2‡ | 14.9 ± 3.3‡ | 14.2 ± 3.3‡ |