Measures of cardiovascular autonomic activity in insomnia disorder: A systematic review.

PLoS One · 2017 · PMC5653329 · PMID 29059210

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an increasing trendno p-value reported

did not reach statistical significanceno p-value reported

Authors found an increasing trend in LF/HF ratio in insomniacs compared to controls, but the differences between the two groups did not reach statistical significance [ 65 ].

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