Slow sleep spindle and procedural memory consolidation in patients with major depressive disorder.

Nat Sci Sleep · 2016 · PMC4734800 · PMID 26869818

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moderately significantno p-value reported

Multivariate regression analysis for the effect of age between overnight improvement and sleep stages (stage 2 NREM sleep and SWS) revealed a moderately significant multiple correlation coefficient ( R =0.551).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.