Feasibility study of a LED light irradiation device for the treatment of chronic neck with shoulder muscle pain/stiffness.

PLoS One · 2022 · PMC9576044 · PMID 36251669

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did not reach statistical significanceno p-value reported

The pain intensity tended to decrease both immediately after treatment (VAS score: 39.4 mm ± 21.8 mm, p = 0.142) and 15 minutes after treatment (VAS score: 27.7 mm ± 17.2 mm, p = 0.028) compared with before treatment (VAS score: 45.8 mm ± 23.3 mm); however, these pain intensity reductions did not reach statistical significance.

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