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. 2010 Jun 1;4(2):41–46. doi: 10.1016/j.esas.2010.03.005

Fig. 1.

Fig. 1

Chart of average pain (VAS) and function (ODI) scores over time. Both pain and function were statistically significantly reduced at 2-years compared to preoperatively (P < .0001). The slight increase in VAS noted from 6 to 24 months was not statistically significant (P = .6914), and is presumed to be contributed to by adjacent segment issues and other longitudinal problems unrelated to the primary procedure.