Abstract:Abstract: Objective To investigate related factors for percutaneous endoscopic nerve root decompression via transforaminal approach on lumbar spinal stenosis. Methods From May 2016 to January 2017, 105 cases of single segment lumbar spinal stenosis who had completed follow-up data were involved. All the patients had unilateral lower extremity neurological symptoms, and underwent percutaneous endoscopic nerve root decompression via transforaminal approach. The operative effect was assessed according to Oswestry Disability Index (ODI). Firstly, single factor analysis was used in 9 clinical variables that might influence the surgical effect, including age, gender, duration of disease, claudication distance, preoperative ODI scores, segmental distribution, stenosis area, stenosis grade (the radius vector of lateral recesses and intervertebral foramen area). Then, Logistic regression analysis was performed to the indexes with statistical significance. Results Single factor analysis showed that age, gender, claudication distance, segmental distribution, stenosis area, intervertebral foramen area were not significantly correlated with operative effect (P > 0.05). While duration of disease, preoperative ODI scores and radius vector of lateral recesses were significantly correlated with operative effect (P < 0.05). Logistic regression analysis showed that duration of disease and preoperative ODI scores were the major factors influencing the operative effect. Conclusion Duration of disease, preoperative ODI scores and radius vector of lateral recesses were the related factors that affect the surgical effect. Of which, duration of disease and preoperative ODI scores were the major factors influencing the operative effect.