Assertion: melatonin's effect | /r/CapableOf | consider all 4 nights of the study
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Source sentences:
text: Another small randomized, double-blind controlled trial (N = 24) also found a modest improvement in nightly sleep time (by 1 hour) and quality (by 7%, P = 0.04) in critically ill tracheostomy patients who received melatonin 10 mg oral solution compared to placebo; however, these effects were not significantly different overall when considering all 4 nights of the study.