Evidence map›Paper›PMID 41062732›Full record

Trial reportScientific reports2025

Subjective and objective quality of sleep with radiant or convection cooling systems: a randomized, cross-over trial.

Insung Park, Yufei Cui, Fusae Kawana, Morie Tominaga, Riku Miyamura, Hiroshi Yamagishi, Masayasu Okado, Masashi Miyamura, Shuji Nakamura, Chiemi Tanigawa and 3 more

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Insung ParkInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, 305-8575, Ibaraki, Japan.
Yufei CuiS'UIMIN Inc, Shibuya, Tokyo, 151-0061, Japan.
Fusae KawanaInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, 305-8575, Ibaraki, Japan.
Morie TominagaS'UIMIN Inc, Shibuya, Tokyo, 151-0061, Japan.
Riku MiyamuraMIYA JAPAN Co. Ltd, Kurobe, Toyama, 938-0801, Japan.
Hiroshi YamagishiMIYA JAPAN Co. Ltd, Kurobe, Toyama, 938-0801, Japan.
Masayasu OkadoMIYA JAPAN Co. Ltd, Kurobe, Toyama, 938-0801, Japan.
Masashi MiyamuraMIYA JAPAN Co. Ltd, Kurobe, Toyama, 938-0801, Japan.
Shuji NakamuraS'UIMIN Inc, Shibuya, Tokyo, 151-0061, Japan.
Chiemi TanigawaS'UIMIN Inc, Shibuya, Tokyo, 151-0061, Japan.
Toshio KokuboInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, 305-8575, Ibaraki, Japan.
Masashi YanagisawaInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, 305-8575, Ibaraki, Japan.
Kumpei TokuyamaInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, 305-8575, Ibaraki, Japan. tokuyama.kumpei.gf@u.tsukuba.ac.jp.

Funding

Japan Agency for Medical Research and Development JP21zf0127005Japan Society for the Promotion of Science 22K21351
6 · The paper itself

Abstract

Sleep is influenced by environmental factors, and hot ambient temperature undermines sleep quality. Considering the global warming, it becomes increasingly important to keep bedroom temperature cool in the summer. Today, two electrical cooling systems are available: convection and radiant. Convection air cooling system supplies cooled air-flow. Radiant cooling system cools the room through radiation from the cooled surfaces, moisture condensation on which is prevented by reheated refrigeration cycle system. The present study was a randomized, cross-over trial setting room air temperature at 26 ℃ to compare subjective and objective quality of sleep between convection and radiant cooling in 7 healthy women. Subjective and objective quality of sleep were assessed by Oguri-Shirakawa-Azumi Sleep Inventory and EEG-based sleep parameters, respectively. Compared with convection cooling, radiant cooling provided lower relative humidity and air flow. Refreshness, one of the 4 indices of subjective quality of sleep, was higher with radiant cooling. Among the EEG-based sleep parameters, sleep efficiency was higher and sleep latency was shorter with radiant cooling. In spite of similar ambient room temperature, difference in cooling (radiant vs. convection) and/or dehumidifying (ordinary air conditioning vs. reheated refrigeration cycle) method provided difference in thermal comfort affecting subjective and objective quality of sleep.

Indexed as

Air ConditioningSleepSleep QualityAdultCold TemperatureConvectionCross-Over StudiesElectroencephalographyFemaleHumansYoung Adult

Identifiers

PMID41062732
PMCPMC12508066

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.