Baseline demographic and clinical characteristics of patients undergoing ALIF for TLIF/PLIF cage removal (N = 135).
| Characteristics | n (%) |
| Age, y, median (range) | 47 (15–78) |
| Sex, men/women | 68/67 |
| BMI | |
| <25 | 13 (9.6) |
| 25–29 | 68 (50.4) |
| 30–34 | 43 (31.9) |
| 35–40 | 10 (7.4) |
| >40 | 1 (0.7) |
| Indications | |
| Pseudoarthrosis | 107 (79.3) |
| Infection | 5 (3.7) |
| Compression/cage migration | 23 (17.0) |
| Symptoms | |
| Lumbar or axial pain | 57 (42.2) |
| Sciatic pain | 4 (3.0) |
| Axial and sciatic pain | 74 (54.8) |
| Levels operated | |
| L5–S1 | 45 (33.3) |
| L4–L5 | 27 (20.0) |
| L4–L5–S1 | 32 (23.7) |
| L3–L4 | 11 (8.1) |
| L3–L4–L5 | 8 (5.9) |
| L3–L4–L5–S1 | 9 (6.7) |
| L2–L3–L4–L5–S1 | 3 (2.2) |
Abbreviations: ALIF, anterior lumbar interbody fusion; BMI, body mass index; PLIF, posterior lumbar interbody fusion; TLIF, transforaminal lumbar interbody fusion.
Note: Data presented as n (%) unless otherwise noted.