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Table 4 Clinical results (bilateral vs. unilateral fusion, bilateral vs. no fusion)

From: The effects of anterior vacuum disc on surgical outcomes of degenerative versus spondylolytic spondylolisthesis: at a minimum two-year follow-up

  Bilateral (n = 26) Unilateral (n = 9) No fusion (n = 7) Bilateral vs. unilateral p - value Bilateral vs. no fusion p - value
Preoperative ODI score 51.77 ± 12.49 49.33 ± 7.12 51.14 ± 5.54 0.901 0.594
Final ODI score 22.62 ± 9.46 29.56 ± 5.23 34.29 ± 4.33 0.050 0.004
Satisfaction, yes/no, n (%) 22/4 (84.6) 4/5 (44.4) 2/5 (28.6) 0.058 0.002
  1. Data are presented as mean ± SD unless noted otherwise. Satisfaction was based on Brodsky’s criteria. Abbreviation: ODI Oswestry Disability Index.