Number of studies reporting on specific pathology by surgical procedure.
| Variable | ALIF | LLIF | LLIF-P | OLIF-P | PLIF-P | TLIF-P |
| Pathology | ||||||
| Adjacent segment disease | - | 139 | - | - | 139 | - |
| Spondylolisthesis | 118 | - | 235,38 | - | - | 235,38 |
| No specific pathology | 526–30 | 109,10,12,23,35–40 | 610,31–33,36,37 | 713,43–48 | 427,30,49,50 | 125,7,11,14,26,27,44,47,51–54 |
| Levels | ||||||
| Single | 127 | - | 336–38 | 444,47,48 | 227,49 | 105,7,11,29,31,46,49,52,53,55 |
| Multiple and single | 218,26 | 119,10,12,23,33,34,39–42,55 | 510,31–33,35 | 413,43,45,46 | 239,50 | 414,26,35,53 |
| Unspecified | 328–30 | - | - | - | 130 | - |
| Total number of articles reviewed | 6 | 11 | 8 | 7 | 5 | 14 |
Abbreviations: ALIF, anterior lumbar interbody fusion; LLIF, lateral lumbar interbody fusion; LLIF-P, LLIF with posterior fixation; OLIF-P, oblique lumbar interbody fusion with posterior fixation; PLIF-P, posterior lumbar interbody fusion with posterior fixation; TLIF-P, transverse lumbar interbody fusion with posterior fixation.