184   Use of @entity9 Questionnaires in Predicting the Development of @entity11252 Following Lumbar Discectomy for XXXX .

@entity1 @entity16 @entity1746 @entity179 @entity158 @entity11252 @entity614 @entity9
INTRODUCTION: @entity11252 ( @entity11252 ) is a type of @entity9 where @entity1746 symptoms persist despite structurally corrective spinal surgery. This implies more @entity16 rather than simply dysfunction whereby correcting the inciting structural derangement does not provide for clinical resolution. What remains unclear is how to predict which @entity1 are likely to derive benefit from surgical intervention, and whether specific @entity158 characteristics are associated with different likelihoods of good outcome. METHODS: This study analyzed a prospective data set of @entity1 managed surgically for painful @entity614 secondary to lumbar @entity179 by the senior author at Toronto Western Hospital neurosurgery over the past 24 months. Clinical parameters include general demographics, preoperative and postoperative clinical examination, surgical details, general self-reported @entity158 and disability scores, and @entity9 scores. The screening tests used in this study were Douleur Neuropathique 4 (DN4) and Leeds Assessment of Neuropathic Symptoms and Signs (LANSS), correlation tested by the Spearman coefficient. Multiple logistic regression analysis was used to define predictors of persistent postoperative symptomatology. RESULTS: Among 250 @entity1 treated for @entity614 , 12% exhibited @entity11252 with modest relief of leg @entity158 compared with the cohort of @entity1 in whom substantial improvement was seen. The postoperative condition was associated with abnormal preoperative screens for @entity9 , but not sex, smoking status, or preoperative @entity158 severity. Good correlation was seen between the 2 screening tests used in this study for both absolute ordinal score and thresholding as @entity9 (Spearman, P < .001). CONCLUSION: While @entity11252 was more common among younger and female @entity1 , this occurred with low overall frequency. Higher @entity9 screening scores correlated strongly with the likelihood and severity of significant postoperative leg @entity158 . Further work is required to develop more accurate prognostication tools for @entity1 undergoing structural spinal surgery for @entity614 .
