<qa>  What was the estimated survival rate at 3 months, 1 year, and 2 years?Using the Kaplan-Meier method for non-surgical and surgical treatment mean survival, as well as survival rate at 3 months, 1 year, and 2 years was determined, and visualised using a Kaplan-Meier plot with 99 C.I. With the Cox proportional hazards regression method multiple covariates contributing to survival are entered and hazard ratio HR presented with 95 C.I. and probability p. As relevant covariates for survival besides surgical treatment age, gender, spinal cord injury, and CCI were identified. Since the assumption was that the medical advancement improved patient survival in general during the last decades, even year of admission was included as covariate in the model. In order to identify a cut-off age where a treatment modality is not associated anymore with greater survival the adjusted HR of a certain age and above was plotted over age with 95 C.I. 