Rod fractures.
| Laterality and Details | Fused?a | Revision? | Occurrence (mo) |
| Left sided below S1, right sided between L5 and S1 | Yes | No | 55 |
| Left sided below S1, right sided between L5 and S1 | Yes | No | 58 |
| Left sided between L5 and S1 | Yes | No | 13 |
| Left sided between L5 and S1 | Yes | No | 3 |
| Left sided below S1, L5 facet fractures | Yes | No | 31 |
| Left below L5, right below S1b | No | Yes | 36 |
aConfirmed fusion at L5-S1 on computed tomography image.
bOne male patient with symptomatic L5-S1 nonunion with bilateral rod fractures.