Table 1 Patients’ characteristics
Parameters | PLIF group (N = 46) | TLIF group (N = 48) |
|---|---|---|
Age (years) | ||
 Range | 20–56 | 23–52 |
 Mean ± SD | 37.59 ± 8.84 | 38.75 ± 7.23 |
Gender | ||
 Male | 15 (32.6%) | 19 (39.6%) |
 Female | 31 (67.4%) | 29 (60.4%) |
Follow-up, months | ||
 Range | 6–30 | 6–32 |
 Mean ± SD | 20.24 ± 7.39 | 19.02 ± 5.03 |
VAS back (preoperative) | ||
 Range | 5–9 | 5–9 |
 Mean ± SD | 7.00 ± 1.26 | 7.25 ± 1.28 |
VAS leg (preoperative) | ||
 Range | 4–9 | 4–9 |
 Mean ± SD | 7.39 ± 1.24 | 6.75 ± 1.28 |
ODI (preoperative) | ||
 Range | 34–79 | 32–77 |
 Mean±SD | 55.37±13.05 | 51.42±12.45 |
Grade of spondylolithesis | ||
 Grade I | 25 cases (54.3%) | 32 cases (66.7%) |
 Grade II | 21 cases (45.7%) | 16 cases (33.3%) |
Type of spondylolithesis, n (%) | ||
 Degenerative | 27 cases (58.7%) | 25 cases (50%) |
 Isthmic | 19 cases (41.3%) | 23 cases (50%) |
Affected level | ||
 L3–L4 | 4 (8.7%) | 3 (6.2%) |
 L4–L5 | 25 (54.3%) | 31 (64.6%) |
 L5–S1 | 17 (37%) | 14 (29.2%) |