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Table 5 Comparison the area of paraspinal muscle fatty infiltration between K-rod group and PLIF in UAS and LAS (−x ± s, cm2)

From: The effect of posterior lumbar dynamic fixation and intervertebral fusion on paraspinal muscles

 

Area of fatty infiltration on UAS

P value

Area of fatty infiltration on LAS

P value

Preoperative

postoperative

Preoperative

postoperative

K-rod group

1.91 ± 1.26

2.69 ± 1.46

 

3.17 ± 1.58

4.74 ± 2.27

 

PLIF group

3.20 ± 1.92

4.13 ± 2.24

 

5.64 ± 1.84

8.12 ± 4.02

 

Group×Rep

  

0.762

  

0.429

Group

  

0.013*

  

< 0.001***

Rep

  

0.001**

  

0.001**

  1. PLIF Posterior lumbar interbody fusion. UAS Upper adjacent segment. LAS Lower adjacent segment
  2. *means P < 0.05. **means P < 0.01.***means P < 0.001.Rep:Repetition