Association of chronic low back and neck pain classification based on ICD-11 with interdisciplinary pain treatment outcomes

Abstract

We investigated the association of chronic low back and neck pain classification based on ICD-11 with pain relief under interdisciplinary pain management. A total of 212 patients with chronic musculoskeletal pain, who visited the Interdisciplinary Pain Center of Keio University Hospital, were categorized into chronic primary musculoskeletal pain (CPMP), chronic secondary musculoskeletal pain, and chronic neuropathic pain (CNP) groups based on ICD-11 and followed-up. We assessed pain intensity using the Brief Pain Inventory (BPI) at the first visit and at 3 months. Improvement of pain was defined as ≥30％ reduction in the BPI. Multivariate logistic regression analysis revealed that CNP were significantly associated with a greater improvement of pain after adjusting for sex, age, duration of pain, level of pain self-efficacy, and treatment options. [odds ratio (CNP/CPMP) (95％ confidence interval); 2.52 (1.25–5.09, p＝0.02)]. We concluded that the ICD-11 code for chronic low back and neck pain is significantly associated with pain treatment outcomes.