Percentage of patients aged 18 years and older undergoing index spine therapy(-ies) who completed baseline and 3-month follow-up (patient-reported) quality-of-life assessment, with an improvement in the quality of life status from baseline. This measure will be calculated with 2 performance rates: Rate 1: Patient population with Follow-up/Patient population with baseline Rate 2: Patient population with improvement in quality of life status after Follow-up/Patient population with Follow-up.