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Table 3 Functional cross-sectional area of the multifidus and erector spinae before and 24 months after surgery

From: Quantitative analysis of paraspinal muscle atrophy after oblique lateral interbody fusion alone vs. combined with percutaneous pedicle screw fixation in patients with spondylolisthesis

 OLIF (n = 32)OLIF+PPSF (n = 41)P a
Multifidus (cm2)
 Pre-op8.59 ± 1.767.72 ± 2.690.099
 Post-op 2 years9.39 ± 1.745.67 ± 1.71< 0.001
Pb0.072< 0.001 
Erector spinae (cm2)
 Pre-op13.32 ± 1.5912.60 ± 2.040.104
 Post-op 2 years13.55 ± 1.3110.15 ± 1.82< 0.001
Pb0.533< 0.001 
  1. OLIF Oblique lateral interbody fusion, PPSF Percutaneous pedicle screw fixation
  2. a Comparison between the two groups
  3. b Comparison between pre- and post-operation