Stiffness after Pan-Lumbar Arthrodesis for Adult Spinal Deformity Does Not Significantly Impact Patient Functional Status or Satisfaction Irrespective of Proximal Endpoint

Study Design.Prospective, multicenter.Objective.To determine if stiffness significantly affects function or satisfaction after pan-lumbar arthrodesis.Summary of Background Data.The Lumbar Stiffness Disability Index (LSDI) is a validated measure of the effect of lumbar stiffness on functional activit