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• W4313340064 endingPage "545" @default.
• W4313340064 startingPage "530" @default.
• W4313340064 abstract "Background Early evidence suggests human assumed central sensitization (HACS) is present in some people with acute low back pain (LBP). Factors influencing individual variation in HACS during acute LBP have not been fully explored. We aimed to examine the evidence for HACS in acute LBP and the contribution of brain-derived neurotrophic factor (BDNF), clinical, psychological and demographic factors to HACS. Methods Participants with acute LBP (<6 weeks after pain onset, N = 118) and pain-free controls (N = 57) from a longitudinal trial were included. Quantitative sensory testing including pressure and heat pain thresholds and conditioned pain modulation, BDNF serum concentration and genotype and questionnaires were assessed. Results There were no signs of HACS during acute LBP at group level when compared with controls. Sensory measures did not differ when compared between controls and LBP participants with different BDNF genotypes. Two LBP subgroups with distinct sensory profiles were identified. Although one subgroup (N = 60) demonstrated features of HACS including pressure/heat pain hypersensitivity at a remote site and deficient conditioned pain modulation, pain severity and disability did not differ between the two subgroups. Variation in sensory measures (~33%) was partially explained by BDNF genotype, sex, age and psychological factors. Conclusions This study confirms that HACS is present in some people with acute LBP, but this was not associated with pain or disability. Further, no relationship was observed between BDNF and HACS in acute LBP. More research is needed to understand factors contributing to individual variation in sensory measures in LBP. Significance Human assumed central sensitization (HACS) is present in acute low back pain (LBP) but factors contributing to individual variation are not fully explored. This study investigated the relationship between factors such as brain derived neurotrophic factor (BDNF) and HACS in acute LBP. Our findings indicate that HACS was present in specific LBP subgroups but BDNF was unrelated to HACS. Combinations of BDNF genotype, demographic and psychological factors explained a small proportion of the variation in sensory measures during acute LBP." @default.
• W4313340064 created "2023-01-06" @default.
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• W4313340064 date "2023-01-11" @default.
• W4313340064 modified "2023-09-23" @default.
• W4313340064 title "Human assumed central sensitization in people with acute non‐specific low back pain: A cross‐sectional study of the association with brain‐derived neurotrophic factor, clinical, psychological and demographic factors" @default.
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• W4313340064 doi "https://doi.org/10.1002/ejp.2078" @default.
• W4313340064 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36585941" @default.
• W4313340064 hasPublicationYear "2023" @default.
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