Table 2.

Patient characteristics dependent on the time of resurgery and significant differences between these two groups.

	All Patients with Resurgery	Resurgery		Significance
		during first year	later
n	19	15 (78.9%)	4 (21.1%)
Radicular pain	17 (89.5%)	15 (100.0%)	2 (50.0%)	P = 0.035
Macnab's outcome criteria
mean	2.9 ± 0.8	3.1 ± 0.8	2.3 ± 0.5	|t|=2.467, ( α 1 = 0.025)t(7)=2.365
substantial pain relief (1+2)	7 (36.8%)	4 (26,7%)	3 (75.0%)
Period until surgery (months)
mean	10.8 ± 17.9	3.0 ± 2.3	40.3 ± 20.8	|t|=3.588, ( α 1 = 0.025)t(3)=3.182