Table 4 Pearson’s correlation coefficient between continuous variables
|  | Age | BMI | Duration of pain | VAS LBP | VAS leg pain | ODI | TNF | IL-1β | IL-15 | TGF-β1 |
|---|---|---|---|---|---|---|---|---|---|---|
Unilateral side | ||||||||||
CSA of psoas muscle (mm 2 ) | 0.169 (0.196) | -0.259 (0.056) | -0.081 (0.512) | -0.102 (0.438) | 0.014 (0.918) | -0.252 (0.052) | - | |||
CSA of multifidus muscle (mm 2 ) | -0.192 (0.054) | -0.017 (0.899) | -0.041 (0.714) | -0.005 (0.967) | -0.089 (0.497) | -0.144 (0.273) | ||||
CSA of erector spinae muscle (mm 2 ) | 0.176 (0.178) | 0.079 (0.612) | 0.078 (0.552) | 0.043 (0.746) | 0.204 (0.118) | 0.023 (0.859) | ||||
Functional CSA of multifidus muscle (mm 2 ) | 0.054 (0.680) | -0.131 (0.318) | -0.121 (0.287) | -0.015 (0.907) | -0.079 (0.546) | -0.142 (0.281) | ||||
Fatty degeneration of multifidus muscle | -0.175 (0.229) | 0.130 (0.185) | -0.011 (0.178) | -0.004 (0.978) | 0.091 (0.488) | -0.027 (0.836) | ||||
Ipsilateral side | ||||||||||
CSA of psoas muscle (mm 2 ) | 0.098 (0.457) | -0.210 (0.108) | 0.224 (0.176) | 0.037 (0.782) | -0.112 (0.393) | -0.201 (0.084) | -0.364 (0.011*) | -0.159 (0.271) | 0.183 (0.342) | 0.254 (0.109) |
CSA of multifidus muscle (mm 2 ) | -0.281 (0.030*) | 0.061 (0.643) | -0.368 (0.041*) | 0.101 (0.440) | -0.228 (0.021*) | -0.244 (0.026*) | -0.509 (0.000***) | -0.674 (0.000***) | -0.058 (0.771) | -0.255 (0.107) |
CSA of erector spinae muscle (mm 2 ) | -0.262 (0.041*) | 0.053 (0.690) | 0.236 (0.173) | 0.044 (0.738) | -0.260 (0.044*) | 0.054 (0.680) | -0.403 (0.004**) | -0.129 (0.103) | 0.252 (0.092) | 0.162 (0.222) |
Functional CSA of multifidus muscle (mm 2 ) | -0.101 (0.441) | -0.018 (0.890) | -0.478 (0.022*) | 0.091 (0.488) | -0.148 (0.260) | -0.085 (0.520) | -0.437 (0.002**) | -0.691 (0.000***) | 0.062 (0.756) | 0.313 (0.046*) |
Fatty degeneration of multifidus muscle | -0.347 (0.007**) | -0.160 (0.471) | 0.266 (0.321) | -0.033 (0.800) | -0.082 (0.533) | 0.100 (0.446) | -0.488 (0.000**) | 0.064 (0.657) | 0.330 (0.087) | 0.200 (0.209) |
VAS LBP | - | 0.410 (0.004**) | 0.522 (0.000***) | -0.119 (0.545) | 0.682 (0.000***) | |||||
VAS leg pain | 0.286 (0.049*) | 0.462 (0.001**) | 0.298 (0.123) | 0.387 (0.012*) | ||||||
ODI | 0.502 (0.000***) | 0.449 (0.001**) | -0.028 (0.889) | 0.354 (0.023*) | ||||||