Prevalence of neuropathic pain and patient-reported outcomes in Korean adults with chronic low back pain resulting from neuropathic low back pain

Jin Hwan Kim, Jae Taek Hong, Chong Suh Lee, Keun Su Kim, Kyung Soo Suk, Jin Hyok Kim, Ye Soo Park, Bong Soon Chang, Deuk Soo Jun, Young Hoon Kim, Jung Hee Lee, Woo Kie Min, Jung Sub Lee, Si Young Park, In Soo Oh, Jae Young Hong, Hyun Chul Shin, Woo Kyung Kim, Joo Han Kim, Jung Kil LeeIn Soo Kim, Yoon Ha, Soo Bin Im, Sang Woo Kim, In Ho Han, Jun Jae Shin, Byeong Cheol Rim, Bo Jeong Seo, Young Joo Kim, Juneyoung Lee

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Abstract

Study Design: A noninterventional, multicenter, cross-sectional study. Purpose: We investigated the prevalence of neuropathic pain (NP) and patient-reported outcomes (PROs) of the quality of life (QoL) and functional disability in Korean adults with chronic low back pain (CLBP). Overview of Literature: Among patients with CLBP, 20%-55% had NP. Methods: Patients older than 20 years with CLBP lasting for longer than three months, with a visual analog scale (VAS) pain score higher than four, and with pain medications being used for at least four weeks before enrollment were recruited from 27 general hospitals between December 2014 and May 2015. Medical chart reviews were performed to collect demographic/clinical features and diagnosis of NP (douleur neuropathique 4, DN4). The QoL (EuroQoL 5-dimension, EQ-5D; EQ-VAS) and functional disability (Quebec Back Pain Disability Scale, QBPDS) were determined through patient surveys. Multiple linear regression analyses were performed to compare PROs between the NP (DN4=4) and non-NP (DN4 < 4) groups. Results: A total of 1,200 patients (females: 65.7%; mean age: 63.4±13.0 years) were enrolled. The mean scores of EQ-5D, EQ-VAS, and QBPDS were 0.5±0.3, 55.7±19.4, and 40.4±21.1, respectively. Among all patients, 492 (41.0%; 95% confidence interval, 38.2%- 43.8%) suffered from NP. The prevalence of NP was higher in male patients (46.8%; p < 0.01), in patients who had pain based on radiological and neurological findings (59.0%; p < 0.01), and in patients who had severe pain (49.0%; p < 0.01). There were significant mean differences in EQ-5D (NP group vs. non-NP group: 0.4±0.3 vs. 0.5±0.3; p < 0.01) and QBPDS (NP group vs. non-NP group: 45.8±21.2 vs. 36.3±20.2; p < 0.01) scores. In the multiple linear regression, patients with NP showed lower EQ-5D (β=-0.1; p < 0.01) and higher QBPDS (β=7.0; p < 0.01) scores than those without NP. Conclusions: NP was highly prevalent in Korean patients with CLBP. Patients with CLBP having NP had a lower QoL and more severe dysfunction than those without NP. To enhance the QoL and functional status of patients with CLBP, this study highlights the importance of appropriately diagnosing and treating NP.

Original languageEnglish
Pages (from-to)917-927
Number of pages11
JournalAsian Spine Journal
Volume11
Issue number6
DOIs
Publication statusPublished - 2017 Dec 1

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

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    Kim, J. H., Hong, J. T., Lee, C. S., Kim, K. S., Suk, K. S., Kim, J. H., Park, Y. S., Chang, B. S., Jun, D. S., Kim, Y. H., Lee, J. H., Min, W. K., Lee, J. S., Park, S. Y., Oh, I. S., Hong, J. Y., Shin, H. C., Kim, W. K., Kim, J. H., ... Lee, J. (2017). Prevalence of neuropathic pain and patient-reported outcomes in Korean adults with chronic low back pain resulting from neuropathic low back pain. Asian Spine Journal, 11(6), 917-927. https://doi.org/10.4184/asj.2017.11.6.917