Age(years) | 63.2 ± 10.9 |  |
---|---|---|
Gender (F/M) | 27/11 | Â |
Multi-level LDDs with intervertebral instability(cases) | Â | Â |
 2-level | 27 |  |
 3-level | 9 |  |
 4-level | 2 |  |
Instability segment | Â | Â |
 L3/4 | 5 |  |
 L4/5 | 33 |  |
Segment treated with PTES(cases) | Â | Â |
 1 segment | 31 |  |
 |  Instability segment | 25 |
 |  No instability segment | 6 |
 2 segments (including instability) | 7 |  |
Operation duration(minutes) | Â | Â |
 PTES | 48.9 ± 7.3 |  |
 OLIF | 69.2 ± 11.6 |  |
Frequency of intraoperative fluoroscopy(times) | Â | Â |
 PTES | 6 (5–9) |  |
 OLIF | 7 (5–10) |  |
Blood loss(ml) | 30 (15–60) |  |
Incision length(mm) | Â | Â |
 PTES | 8.1 ± 1.1 |  |
 OLIF | 40.0 ± 3.2 |  |
Hospital stay(days) | 4 (3–6) |  |