I am 54 years old, and have been suffering from sciatica caused by spondylolisthesis since 2007. My third ESI is scheduled for this Friday. I know the spinal fusion surgery requires a very long recovery period, and is not always successful. If I do decide to get the surgery, would it be better to get it in my 50's, or my 60's? I would like to put it off as long as possible, but don't want my spine degeneration to get so bad that it makes surgery more involved. Any suggestions? I'm afraid to go out on a long disability from work. I may not have a job to go back to.