Mild traumatic brain injury is associated with effect of inflammation on structural changes of default mode network in those developing chronic pain

Table 4 Stepwise multiple regression analysis

Inflammatory Level	Correlation coefficient	T	P	Partial correlation	Collinearity statistics
Inflammatory Level	Correlation coefficient	T	P	Partial correlation	Tolerance	VIF
CCL2^a	0.355	3.283	0.002^*	0.355	1.000	1.000
IL-1β^b	0.015	0.139	0.890	0.016	1.000	1.000
IL-4^b	0.010	0.093	0.927	0.011	0.999	1.001
IL-6^b	− 0.106	−0.981	0.330	− 0.113	0.994	1.006
IL-8^b	− 0.027	−0.185	0.854	− 0.022	0.542	1.843
IL-10^b	0.025	0.229	0.819	0.027	0.991	1.009
IL-12^b	0.017	0.156	0.876	0.018	1.000	1.000
IFN-γ^b	0.038	0.347	0.730	0.040	0.999	1.001
TNF-α^b	0.032	0.291	0.772	0.034	1.000	1.000

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