简介:BACKGROUND:Todaythereissomeevidence-basedmedicinesupportforapositiveshorttermtreatmenteffectoffusioninchroniclowbackpaininspondylolisthesisandinnonspecificdegenerativelumbarspinedisorders.Thelong-termeffectis,however,unknown.PURPOSE:Todeterminethelong-termoutcomeoflumbarfusioninadultisthmicspondylolisthesis.STUDYDESIGN:Prospective,randomizedcontrolledstudycomparinga1-yearexerciseprogramwithinstrumentedandnon-instrumentedposterolateralfusionwithaveragelong-termfollow-upof9years(range,5-13)。