Single operated N = 149 | Re-operated N = 17 | P-value between the groups | |
---|---|---|---|
Level of surgery | 0.74 | ||
L1–2 | 4 (2.7) | 0 (0) | |
L2–3 | 4 (2.7) | 0 (0) | |
L3–4 | 9 (6.0) | 0 (0) | |
L4–5 | 72 (48.3) | 8 (47.1) | |
L5-S1 | 57 (38.3) | 8 (53.7) | |
L4-L5 and L5-S1 | 3 (2.0) | 1 (5.9) | |
Site of first operation | 0.075 | ||
right | 58 (38.9) | 6 (29.4) | |
left | 85 (57.1) | 9 (53.0) | |
central | 7 (4.0) | 2 (17.6) | |
SLR before operation | 0.91 | ||
right | 29 (19.5) | 4 (23.6) | |
left | 36 (24.1) | 3 (17.6) | |
both sides | 8 (5.1) | 1 (5.9) |