Age-Limited Effects of Low-Frequency Transcutaneous Electric Nerve Stimulation on Insomnia: A 4-Week Multi-Center, Randomized Controlled Study.

Psychiatry Investig · 2022 · PMC9233949 · PMID 35753684

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did not reach statistical significanceno p-value reported

Although the amplitude of these improvements was greater in the experimental group, it did not reach statistical significance ( Table 2 ).

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