Table 1 Comparison of the baseline data
Posterolateral fusion | Intervertebral fusion | P value | |
|---|---|---|---|
Patients (n) | 24 (24/650) | 9 (9/450) | |
Males/females | 9/15 | 3/6 | |
Mean age (y) | 72.80 ± 11.7 | 71.90 ± 10.7 | 0.583 |
Follow-up (y) | 4.20 ± 2.25 | 4.32 ± 2.54 | 0.654 |
Involved levels | |||
L4–5 | 18 | 5 | < 0.0001 |
L5-S1 | 6 | 4 | < 0.0001 |
Hospital stay (days) | 12.55 ± 3.35 | 15.43 ± 5.20 | < 0.0001 |
Surgery time (minutes) | 100.50 ± 30.50 | 150.50 ± 25.50 | < 0.0001 |
Blood loss (ml) | 150.65 ± 35.45 | 230.90 ± 101.50 | < 0.0001 |
Wound infection | 4 | 3 | 0.730 |
Screw misplacement | 7 | 3 | < 0.0001 |
Neurological deficit | 5 | 1 | < 0.0001 |
Nonunion | 4 | 1 | < 0.0001 |
Screw fracture | 4 | 1 | < 0.0001 |