The effect of continuous ultrasound on chronic non-specific low back pain: a single blind placebo-controlled randomized trial.

BMC Musculoskelet Disord · 2012 · PMC3537701 · PMID 23031570

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did not reach statistical significanceno p-value reported

Regarding secondary outcome measures, although lumbar flexion and extension ROM increased in both groups after treatment, the increase did not reach statistical significance within groups.

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