Table 2: MIS LLIF fusion procedure characteristics.

Parameter Expandable Static
Type of Surgery, n (%)
One-level 44 (77.2%) 23 (71.9%)
Two-level 13 (22.8%) 9 (28.1%)
Levels Instrumented, n (%)
L1-L2 4 (5.7%) 0 (0.0%)
L2-L3 11 (15.7%) 7 (17.1%)
L3-L4 23 (32.9%) 15 (36.6%)
L4-L5 32 (45.7%) 19 (46.3%)
Mean Estimated Blood Loss, Mean (SD)
One-level 22.0 (10.5) 38.9 (30.1)
Two-level 30.8 (7.3) 86.7 (155.9)
Mean Operative Time, Mean (SD)
One-level 53.4 (11.0) 65.0 (39.6)
Two-level 79.9 (20.1) 84.1 (32.2)
Mean Length of Hospital Stay, Mean (SD)
One-level 3.3 (2.0) 2.1 (1.2)
Two-level 4.5 (2.8) 2.6 (1.9)