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

Table 7 Correlational analysis of postoperative lower back pain and paraspinal muscle atrophy and fatty infiltration

Model	Unstandardized Coefficients		Standardized Coefficients	t value	P value
Model	B	Beta	Beta	t value	P value
(Constant)	2.244	0.438		5.127	< 0.001^***
Area paraspinal muscle of UAS(X₁)	−0.128	0.035	−0.483	−3.674	0.001^**
Area of fatty infiltration of LAS(X₂)	0.097	0.035	0.360	2.738	0.010^*

UAS Upper adjacent segment. LAS Lower adjacent segment. ^*means P < 0.05.^**means P < 0.01.^***means P < 0.001
^a Dependent Variable: VAS score

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