Efficacy of a multidimensional versus usual care physiotherapy on pain and electroencephalography (EEG) spectrum in chronic nonspecific low back pain: study protocol for a randomized controlled trial.

Non-specific chronic low back pain (NSCLBP) is a major public health and global socioeconomic burden associated with a complex interplay of biopsychosocial factors. Despite scientific signs of progress, treatment of NSCLBP often tends to stick to a biomechanical model, without targeting psychological and social factors. To enhance the clinical efficacy of usual physiotherapy for NSCLBP, the development of clinical strategies is to be pursued. This study aims to assess the effectiveness of multidimensional physiotherapy based on a biopsychosocial approach compared to usual care physiotherapy, on clinical findings and electroencephalography spectrum in non-specific chronic low back pain. This study is a triple-blind, two-arm (1:1) randomized controlled trial with a 4 months follow-up. Seventy NSCLBP patients will be randomly allocated to either the experimental (multidimensional physiotherapy) or the active control group (usual physiotherapy); each group will receive 6 weeks of physiotherapy. The main outcome is pain and secondary outcomes are brain function, quality of life, disability, lumbar flexion range of motion, and psychosocial correlates. Assessment will be performed at baseline, post-treatment, and at 1 and 4 months follow-up. Findings may provide evidence on the effectiveness of multidimensional physiotherapy on clinical findings and brain characteristics and might provide evidence towards showing the role of brain and biopsychosocial factors on chronic pain. ClinicalTrials.gov NCT04270422 , Registered on 17 February 2020, IRCT Identifier: IRCT20140810018754N11