The study was conducted in Denmark and included participants who had LBP of 2 to 12 months without radiculopathy and without a satisfactory response to intervention provided.
The participants underwent lumbar spine MRI within 30 days of initial presentation to measure their lumbar spine CSA. The disability from LBP was assessed using the 23-item Roland-Morris Disability Questionnaire (in Danish) and pain intensity was measured via an 11-point Numerical Rating Scale.
When the data were analysed, it was found that there was a significant association between lower CSA and higher disability. However, no significance was determined between the CSA of lumbar PS muscles and pain intensity.