Influence of body composition and trunk strength in psychosocial variables in chronic low back pain adults

Objective: To compare pain, disability, kinesiophobia, body composition, and trunk strength between sexes and age groups in adults with non-specific chronic low back pain (NSCLBP); and to explore the associations of pain, disability, and kinesiophobia with psychosocial variables, body composition and trunk strength in adults with NSCLBP. Design: Cross-sectional study. Settings: University research laboratory. Participants: 43 patients with NSCLBP (33.8 ± 11.8 years; 49% female, pain intensity 5.07/10 points) were recruited by convenience. Interventions: Not applicable. Main Outcome: Isometric and isokinetic trunk strength were performed. Validated questionnaires for pain intensity, disability, and kinesiophobia were administered. Between-group comparisons (sex and age group) were performed using independent-samples t-tests, and associations between psychosocial outcomes and body composition/trunk strength variables were assessed using linear regression. Results: No significant differences were found by sex or age group in any psychosocial variable. (p>0.05). Weak to moderate associations were found between psychosocial measured and trunk strength and body composition. Variance in disability meadured with ODI (Adj. R2 = 0.195, p = 0.005), or RMQD (Adj. R2 = 0.324, p