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KMID : 1002120140110010033
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Journal of Korean Sleep Research Society
2014 Volume.11 No. 1 p.33 ~ p.37
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Effects of an Indigo Blanket on Insomnia Symptoms: Double Blind, Placebo-Controlled, Randomized Pilot Study
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Kwon Young-Nam
Sung Min-Ji
Cho Han-A
Chang Eun-Joo
Park Kwang-Ae
Park Jang-Woon
Jeon Eun-Jin
Kim Eun-Ha
Lee Seung-Hoon
You Hee-Cheon
Ha Tae-Il
Shin Won-Chul
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Abstract
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Objectives: Transient insomnia symptoms are seen in about 30?50% of general population, which needs easily accessible and comfortable methods to improve the sleep quality. To assess the effect of indigo blanket on sleep promotion, we conducted a double-blind, placebo-controlled, randomized trial.
Methods: Thirty subjects were recruited in this study and were randomly divided into two groups, indigo blanket and placebo blanket group. The subjects went to sleep with indigo or placebo blanket for one week. All subjects were asked to complete the sleep questionnaires [Insomnia Severity Index, Pittsburgh Sleep Quality Index, World Health Organization (WHO)-5 Well-Being Index] and to record the sleep diary before and after they use the blanket. The effects of each blanket was evaluated by sleep quality improvement and sleep satisfaction during their use of blanket, based on the sleep diary and sleep questionnaires.
Results: Estimated total sleep time (268 min vs. 318 min) was increased in indigo blanket group (p<0.05). Estimated sleep latency and sleep efficacy, Pittsburgh Sleep Quality Index, WHO-5 Well-Being Index, and Insomnia Severity Index scores were not different among two groups.
Conclusions: This pilot study suggests that the indigo blanket could have sleep promoting property and may warrant further research about effects of indigo blanket on sleep quality.
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KEYWORD
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Insomnia, Indigo blanket, Sleep quality
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