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. 2011 Nov 24;2011:809312. doi: 10.1155/2011/809312

Figure 2.

Figure 2

Mean and standard deviations for subjective sleep quality (SQ) and feeling of being refreshed in the morning (FBR) for the intervention and waiting-list control group. Lower rates indicate better sleep (PSQI). Effect sizes (Cohens d) are demonstrated for significant t-tests P < .001, *P = .015.