Objective: The objective of this study was to characterize the effect of preoperative variables on outcomes after minimally invasive lumbar microdiscectomy. Materials and Methods: This study was done from January 2019 to May 2020. This included medical records of all patients who were diagnosed with lumbar disc herniation and treated surgically by microdiscectomy. The medical records of such patients from January 2016 to January 2018 were included in this study.

Postoperative outcomes were analyzed by Oswestry Disability Index (ODI), visual analog scale (VAS) leg, and VAS back scores, that were noted at preoperative, immediate postoperative, 6 months postoperative, and 1 year after operation. Difference in each outcomes score as calculated postoperatively with respect to the preoperative readings. Minimal clinically important difference was further calculated for each outcome score.…