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Figure 2 | Critical Care

Figure 2

From: Effects of earplugs and eye masks combined with relaxing music on sleep, melatonin and cortisol levels in ICU patients: a randomized controlled trial

Figure 2

Comparison between groups of urinary excretion of 6-SMT during the night before surgery, and the first and second postoperative nights. No significant differences were found between the two groups in 6-SMT levels during the night before surgery, or the first and second postoperative nights (P >0.05). 6-SMT, 6-sulphatoxymelatonin.

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