Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 2 Comparison of the operated levels between FA (n = 101) and CTNav (n = 91) groups
|  | FA group (n = 101) | CTNav group (n = 91) | p |
|---|---|---|---|
Single-level surgery (%) | 59 (58.4) | 53 (58.2) | 0.980 |
 L2–L3 (%) | 0 (0.0) | 1 (1.1) |  |
 L3–L4 (%) | 4 (4.0) | 6 (6.6) |  |
 L4–L5 (%) | 38 (37.6) | 38 (41.7) |  |
 L5–S1 (%) | 17 (16.8) | 8 (8.8) |  |
Two-level surgery (%) | 35 (34.7) | 33 (36.3) | 0.815 |
 L2–L4 (%) | 3 (3.0) | 3 (3.3) |  |
 L3–L5 (%) | 20 (19.8) | 17 (18.7) |  |
 L4-S1 (%) | 12 (11.9) | 13 (14.3) |  |
Three-level surgery (%) | 7 (6.9) | 5 (5.5) | 0.681 |
 L2–L5 (%) | 5 (4.9) | 4 (4.4) |  |
 L3–S1 (%) | 2 (2.0) | 1 (1.1) |  |