Table 3.

Duration of 50% pain reduction (in weeks) for patients receiving more than one radiofrequency treatment (RF)

	RF
	1	2	3
Patient 1	21	40	>52
Patient 2	26	25
Patient 3	52	46
Patient 4	47	>52
Patient 5	0a	0
Patient 6	13	0
Patient 7	1b	>52

^aThe first RF therapy was described as very difficult because of osteophytes, therefore it was repeated after success failure. However, it resulted again in failure

^bThe first RF therapy was only positive for the right side, after repeating the left side the therapy was successful