Employment status Group I Group II
Baseline 12 months 24 months Baseline 12 months 24 months
Employed part-time 3 2 1 1 1 1
Employed full-time 6 10 10 10 16 16
Unemployed  (due to pain) 3 0 1 7 1 1
Eligible for employment at baseline 12 12 12 18 18 18
Total Employed 9 12 11 11 17 17
Housewife 2 2 2 10 8 8
Disabled 33 32 32 24 24 24
Retired/Over 65 13 13 13 8 8 8
Total Number of Patients 60 60 60 60 60 60
Successful subject - At least 3 weeks relief from first 2injections
Table 5: Therapeutic procedural characteristics with average relief per procedure, and average total relief in weeks over a period of 2 years.