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. Author manuscript; available in PMC: 2012 May 15.
Published in final edited form as: Spine (Phila Pa 1976). 2011 May 15;36(11):879–885. doi: 10.1097/BRS.0b013e3181e8e77c

Figure 2.

Figure 2

A, Kaplan-Meier curves depicting survival for patients (A) between 65 and 74 years of age stratified by treatment. B, Kaplan-Meier curves depicting survival for patients between 75 and 84 years of age stratified by treatment. C, Kaplan-Meier curves depicting survival for patients 85 years of age and over stratified by treatment.