Preoperative Leg Pain as a Predictor of Clinical Outcomes after Single Lumbar Microdecompression Surgery in Young and Middle-Aged Groups: A Retrospective Study

Abstract

Background: Previous studies have stated that the higher the LP VAS, the better the outcome. However, there is no quantification of this relationship. Objectives: To maximize the understanding of the effect of symptom duration and intensity of leg pain on surgical outcome at one year, ascertain whether the level of radiculopathy influences outcome, and examine the possible factors that may lead to repeat surgery at the same level in young and middle age groups. Methods: Retrospective data was collected from patients who underwent primary, single-level lumbar decompression surgery with a 12-month follow-up period. We used the ROC curve to determine the LP VAS cutoff value. Results: 500 patients were included. There was a significant improvement in LBP VAS and LP VAS after 12-month follow-up (84% and 95%, respectively). There was a significant relationship between the reoperation rate and LP VAS, with a p-value of 0.001. LP VAS (>7.0) is the maximum area under the curve, with 92% sensitivity and 37% specificity to predict reoperation. There was no significant relationship with the duration of radiculopathy. Conclusions: Patients (92%) with a preoperative LP VAS >7.0 are more susceptible to re-operation surgery. LP cannot be used as a predictor of surgical outcome independently of other factors. Surgeons should be more cautious in selecting patients for surgery and not base their decision only on preoperative leg pain.