“…Furthermore, outcomes questionnaires that are available at the institutional level, such as Oswestry Disability Index, Visual Analog Scale, and SF-36, are absent from insurance claims data, which significantly limits the level of detail available to characterize patient outcomes. Another factor to consider for potential SCS candidates is preoperative psychological evaluations, which prior studies have shown to be an important predictor of postoperative outcomes; again, this unfortunately cannot be ascertained from insurance databases (22)(23)(24). Ultimately, although elective SCS explantation is suggestive of patient dissatisfaction and poor efficacy, we do not know this with certainty, nor do we know whether all patients who retain their devices are actively using them.…”