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The mean relative disc height (in percent) of the lytic/olisthetic level in comparison to the L3/L4 disc preoperatively, at the first follow-up, and at the last follow-up
| Direct repair (n=25) Disc height (SD) [% of L3/L4] |
Segmental fusion (n=23) Disc height (SD) [% of L3/L4] |
|
|---|---|---|
| Preoperatively | 103 (19) | 93 (20) |
| First follow-up | 92 (20)* | 78 (20) |
| Last follow-up | 82 (18)* | 63 (31) |
*Paired t test, P=0.018
