Skip to main content
. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Spine (Phila Pa 1976). 2011 Dec 1;36(25):2197–2210. doi: 10.1097/BRS.0b013e3182341edf

Figure 1.

Figure 1

Primary outcomes over time for Spinal Stenosis Duration of Symptoms one year or less and More than 1 year.
  • Surgery p-value compares duration of symptoms one year or less to more than 1 year among Surgery.
  • Non-operative p-value compares duration of symptoms one year or less to more than 1 year among Non-operative.
  • Interaction p-value compares treatment effect (surgery vs. non-operative) between duration of symptoms one year or less and more than 1 year.

* P-values are time weighted average 4 years (Area Under Curve p-values).