Figure 2.

Functional outcome according to parameters significant in univariate analysis, and representation of global model. Good functional evolution was defined by a Rankin score of 3 or better indicating the ability of walking without human help. Each square represents cumulative incidence of good functional evolution over time according to each studied variable, with associated global P value in univariate analysis. In brackets are the effectives of each subgroup. (A) Outcome whether decompressive surgery is performed or not (isolated arthrodesis was not considered as decompressive); (B) Outcome according to the worst AIS at installation of neurological impairment; (C) Outcome according to modified Charlson score with a cut-off at 5; (D) Outcome according to spine level of compression; (E) Graphical representation of final Cox proportional hazards model with confidence interval and 50% cumulative incidence line.