Ultrasound therapy: Dose-dependent effects in LBP treatment.

BACKGROUND: Low back pain (LBP) affects most people at least once in their lives.

OBJECTIVE: To evaluate the efficacy of ultrasound therapy (UD) in patients with LBP receiving two different treatment dosages.

METHODS: The study design was a randomized prospective study. Patients were subjected to UD for two weeks. All persons in the study were evaluated at the Outpatient Rehabilitation Clinic at the Antoni Jurasz University Hospital in Bydgoszcz, Poland. Inclusion criteria were lumbosacral pain lasting more than 8 weeks, signs of osteoarthritis on imaging studies, and ages30-65 years. Exclusion criteria were radicular pain, nonmechanical causes of pain, contraindications for UD, or the patient received other LBP therapy during the study. The Oswestry Disability Index (ODI), Roland-Morris Disability Questionnaire (RM), and Visual Analog Scale (VAS) were used to evaluate the results.

RESULTS: For both groups, the ODI scores were significantly reduced by 13.7% and 8.84%, the RM scores decreased by 3.37 points and 3.59 points, and pain remissions on the VAS scale were 20.28 mm and 16.31 mm (p< 0.05).

CONCLUSION: UD decreased patients' disability levels and pain intensity. However, effective ultrasound parameters must be determined because of the wide dosage variations.