Table 2 Correlation analysis between the three baseline health-related quality of life outcome scores and between initial and final scores

Patient outcome measures

Correlation between initial and final scores

p-value

Pearson correlation coefficient

ODI

0.641

<0.001*

  Function

0.306

0.061

  Pain

0.475

0.003*

  Self-image

0.401

0.013*

  Mental health

0.257

0.119

  Satisfaction with treatment

−0.376

0.084

  Total score

0.472

0.003*

  EQ-5D-5L

0.219

0.192

  EQ-VAS

0.203

0.228

Between outcome measures

r

p-value

ODI and SRS-22r total scores

0.788

<  0.001*

ODI and EQ-5D-5L

0.748

<  0.001*

SRS-22r total score and EQ-5D-5L

0.764

<  0.001*