• Dennis Møgeltoft Poulsen, Jens Christian Hedemann Sørensen, Morten Rune Blichfeldt-Eckhardt, Helga Angela Gulisano, Anne Lene Høst Knudsen, Lone Nikolajsen, and Kaare Meier.
• Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark.
• Neuromodulation. 2021 Jan 1; 24 (1): 76-85.

ObjectiveSpinal cord stimulation (SCS) is an important treatment modality used to treat chronic neuropathic pain. However, reported success rates of 26%-70% entail an increased focus on patient selection. An area of core interest is psychological evaluation, often using scales such as the Pain Catastrophizing Scale (PCS). The aim of this study was to assess the relation between baseline PCS scores obtained before implantation and SCS outcomes defined as (1) Rating on Patients' Global Impression of Change scale (PGIC), (2) Pain relief on the Numeric Rating Scale (NRS), (3) Cessation of pain medication, and (4) Risk of permanent explantation.Materials And MethodsUsing records from the Neurizon Neuromodulation Database, we performed a multicenter open cohort study of 259 permanently implanted SCS patients. Follow-up ranged from six months to nine years (median = three years). For each of the defined SCS outcomes, patients were grouped according to their latest follow-up registration. Subsequently, we used a one-way ANOVA and exact t-tests to compare mean baseline PCS scores between groups.ResultsNo difference in mean baseline PCS scores was found between PGIC groups. Baseline PCS scores was not associated with the probability of obtaining 30% or 50% pain relief on latest registration. Baseline PCS scores of patients able to cease all usage of tricyclic antidepressants, antiepileptics, or opioids during SCS treatment did not differ from baseline scores of continuous users. We found no association between baseline PCS scores and risk of permanent explantation.ConclusionThis study did not demonstrate any associations between baseline PCS scores and SCS outcomes.© 2020 International Neuromodulation Society.

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