Abstract

The aim is to investigate whether a simple prone posture assessment test (P-test) at baseline can be predict the effectiveness of at least 3months of physiotherapy for adults with structural spinal disorders. Seventy-six adults (age 71.0 ± 7.1years) with structural spinal disorders who visited our outpatient clinic and underwent physiotherapy, which included muscle strength and range of motion training was provided once a week for a minimum of 3months, and where the load was adjusted individually by the physiotherapist. The P-test is performed with the subject lying on the bed in a prone position and is positive if no low back pain is seen and the abdomen touches the bed. The Oswestry Disability Index (ODI) was used to assess disability. The minimum clinically important difference (MCID) was set at 10% improvement of the ODI score. Logistic regression analysis was performed to investigate the association between baseline P-test and achievement of ODI-MCID. The study population characteristics were: Sagittal vertical axis 138.1 ± 73.2mm; Pelvic tilt, 36.9 ± 9.8 degrees; Pelvic incidence minus lumbar lordosis, 45.3 ± 22.1 degrees; and maximum coronal Cobb angle, 21.3 ± 19.7 degrees. Logistic regression analysis showed that being positive on the P-test was associated with the achievement of ODI-MCID (Odds ratio, 8.381; 95% confidence interval, 2.487-35.257). This study found that our developed P-test was a useful predictor of achieving the ODI-MCID in a cohort of adults with structural spinal disorders receiving at least 3months of physiotherapy.

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