Jin-Hwan Kim 1 , Jae Taek Hong 2 , Chong-Suh Lee , 3 , Keun-Su Kim , 4 , Kyung-Soo Suk 5 , Jin-Hyok Kim 6 , Ye-Soo Park 7 , Bong-Soon Chang 8 , Deuk Soo Jun 9 , Young-Hoon Kim 10 , Jung-Hee Lee 11 , Woo-Kie Min 12 , Jung-Sub Lee 13 , Si-Young Park 14 , In-Soo Oh 15 , Jae-Young Hong 16 , Hyun-Chul Shin 17 , Woo-Kyung Kim 18 , Joo-Han Kim 19 , Jung-Kil Lee 20 , In-Soo Kim 21 , Yoon Ha 22 , Soo-Bin Im 23 , Sang Woo Kim 24 , In-Ho Han 25 , Jun-Jae Shin 26 , Byeong Cheol Rim 27 , Bo-Jeong Seo 28 , Young-Joo Kim 28 , Juneyoung Lee 29
07 December 2017
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).
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.
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.
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.