Associations Between Neck and Shoulder Pain and Neuropathic Pain in a Middle-aged Community-living Population

Study Design. A cross-sectional study. Objective. The present study aimed to investigate the prevalence of NeP in subjects suffering from NSP to reveal the impact of NeP on the health-related QOL (HRQOL) in middle-aged and elderly people with NSP in a health checkup. Summary of Background Data. No previous studies have established the relationship between NSP and NeP as potential risk factors contributing to a decreased QOL in the general population. Methods. The present study involved 203 participants (men: 84, women: 119; mean age: 63.3 yr). For each subject, anthro-pometric measurements, physical function examinations, and blood testing were performed. A cut-off score of >0 on the short-form spine painDETECT questionnaire defined the presence of NeP. Subsequently, the NSP (+) subjects were divided into 2 sub-groups: the NeP (+) and NeP (-) groups. For the assessment of QOL, the short form 36 health survey and the EuroQol 5 dimension 5 level version (EQ-5D-5L) tool were used. Results. The study included 100 NSP (+) and 103 NSP (-) subjects. Among the NSP (+) subjects, 46 and 54 subjects were found to be NeP (+) and NeP (-), respectively. For the short form 36 health survey, the multivariate regression analysis revealed that the prevalence of NeP was associated with a lower physical QOL (OR 3.56) and lower mental QOL (OR 4.04). Similarly, the NeP prevalence was found to be the predictor for low QOL scores in EQ-5D-5L (EQ-5D-5L index value <0.875; OR 3.61). Conclusion. The prevalence of NeP was reported to be 46.0% in healthy middle-aged and elderly population suffering from NSP, where it was associated with poor HRQOL. Therefore, strategies aimed at alleviating NeP may contribute significantly to the improvement of QOL in middle-aged and elderly people with NSP.