Functional movement analysis in patients with chronic nonspecific low back pain: a reliability and validity study

Area of Science:

• Biomechanics
• Movement Science
• Rehabilitation Medicine

Background:

• Chronic low back pain (CLBP) is associated with altered fundamental movement patterns.
• Validated analysis tools for functional movement in CLBP are lacking.
• This study addresses the need for reliable movement assessment in CLBP populations.

Purpose of the Study:

• To evaluate the measurement properties of a functional movement analysis (FMA) tool.
• To determine the reliability and validity of FMA in patients with CLBP.
• To provide a validated tool for assessing movement in CLBP.

Main Methods:

• A cross-sectional validation study involving 21 CLBP patients.
• FMA comprises 11 standardized motor tasks assessed by four investigators.
• Interrater reliability calculated using ICC, Cohen's Kappa; validity assessed via Spearman's Rho correlation.

Main Results:

• Excellent interrater reliability for FMA total scores (ICC .92-.94).
• Individual item agreement ranged from 'slight' to 'almost perfect'.
• No significant correlation found between FMA scores and self-reported disability or fear of movement.

Conclusions:

• The FMA demonstrates excellent reliability for both live and video assessments.
• The study sample had low pain and disability levels, limiting definitive validity conclusions.
• Further research is required to establish FMA's conclusive validity in broader CLBP populations.