Table 5.
Reported Failures.
| Author | Reported # of Failures | Reported Radiological Reason for Failure | Reported Clinical Reason for Failure | Does It Meet Our Criteria? |
|---|---|---|---|---|
| Alimi et al7 | 1 | NR | NR | Yes |
| Malham et al5 | 4 | NR | NR | Yes |
| Dominguez et al17 | 2 | NR | Persistent symptoms | Yes |
| Marchi et al11 | 2 | NR | NR | Yes |
| Grimm et al18 | 1 | NR | Persistent symptoms | Yes |
| Phillips et al19 | 7 | NR | Persistent symptoms | Yes |
| Wang et al12 | 13 | Bony lateral recess stenosis(9), associated to reduced central canal/foraminal area (4) | Persistent symptoms | Yes |
| Khajavi et al20 | 26 | NR | NR | Yesa |
| Oliveira et al21 | 1 | Disc and foraminal height were not adequately restored | NR | Yes |
| Reported failures (cases) 57 |
Abbreviation: NR, not reported.
aMet our criteria in terms of that 26 patients required second posterior decompression surgery. However, no information was provided about whether these procedures were done either because of failure (unsuccessful indirect decompression) or a complication (subsidence, etc).