Table 2.

Outcome measures

	Mean	SD	P value
NRS-pain
Pre-treatment	7.4	1.4
Post-treatment
1 month	4.3	2.4	<0.001
3 months	2.5	2.3	<0.001
6 months	2.9	2.5	<0.001
1 year	3.0	2.4	<0.001
2 years	3.1	2.5	<0.001
Patient subjective rating
Post-treatment PGIC	1.4	–

Abbreviations: NRS, Numeric Rating Scale; PGIC, Patient Global Impression of Change; SD, standard deviation.