Table 2.

Therapeutic procedural characteristics with average relief per procedure, and average total relief in weeks over a period of 2 years.

	Number (70)
At One Year
Average number of procedures per one year	3.3 ± 1.07
Total number of procedures in one year	233
Average total relief per one year (weeks)	40.7 ± 19.62
At Two Years
Average number of procedures per two years	5.7 ± 2.73
Total number of procedures in two years	397
Average total relief per two years (weeks)	71.1 ± 37.4
Average Relief per Procedure	13.2 ± 12.6