The Elevated Serum Level of IFN-γ in Patients with Failed Back Surgery Syndrome Remains Unchanged after Spinal Cord Stimulation

Table 5

Correlations between IFN-γ serum level and NRS.

	NRS back 0 (before)	NRS leg 0 (before)
IFN-γ (before); pg/ml	0,618	0,493
	IFN-γ (after 1 month); pg/ml	0,414	0,643

Spearman’s correlation coefficient with highlighted in bold.