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. Author manuscript; available in PMC: 2014 Feb 15.
Published in final edited form as: Spine (Phila Pa 1976). 2013 Feb 15;38(4):279–291. doi: 10.1097/BRS.0b013e31827ec51f

Figure 1.

Figure 1

Study design of SPORT subgroup analysis. Patients from the SPORT spinal stenosis cohort were combined into an “as treated” analysis. The study population includes patients who did not receive epidural injections prior to enrollment in the study.