Effects of transcutaneous electrical nerve stimulation (TENS) and interferential currents (IFC) in patients with nonspecific chronic low back pain: randomized clinical trial.

Sao Paulo Med J · 2011 · PMC10896016 · PMID 21971895

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an increasing trendno p-value reported

There was an increasing trend in the mean duration of analgesia over the course of the sessions, up to a climax in the tenth session for the TENS group and the ninth for the IFC.

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