Association of bedroom environment with the sleep quality of elderly subjects in summer: A field measurement in Shanghai, China

Yan, Yan; Lan, Li; Zhang, Haodong; Sun, Yuxiang; Fan, Xiaojun; Wyon, David Peter; Wargocki, Paweł

doi:10.1016/j.buildenv.2021.108572

Cited by 23 publications

(29 citation statements)

References 32 publications

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“…A field survey during a hot summer in Shanghai found that most elderly residents preferred to use a fan while keeping windows open for natural ventilation during their night-time sleep period, and if air conditioning was used they closed windows and doors to save energy, which resulted in very low ventilation rates. 26 A significant interaction between air temperature and CO 2 concentration on sleep quality was found: Sleep quality decreased significantly at high air temperature and CO 2 concentration. This field survey showed that in practice, the mitigation methods used by the elderly in bedrooms were not able to change both air temperature and ventilation adaptively with the means available to them, for example, they could not reduce the bedroom temperature without reducing the ventilation.…”

mentioning

confidence: 90%

“…26 During the sleep period, the temperatures of 27°C were the thermally neutral temperature for the elderly, 20 while some elderly still used fans in stead of air conditioners when their bedroom air temperatures were up to 30°C. 26 The subjects wore their own (summer typical, short-sleeved) pajamas according to their sleep habits during the experiment; they wore the same pajamas at their experimental nights. The two ventilation conditions were selected to achieve different levels of indoor air quality and to avoid the effect of unacceptably high levels of noise.…”

Section: Experimental Designmentioning

confidence: 99%

“…Our previous field study had also observed a effect, in that the higher CO 2 concentration aggravated the adverse effect of raised temperature on sleep quality. 26 Good ventilation and avoidance of raised temperature in the bedroom are both important for the sleep quality of elderly people.…”

Section: Combined Effect Of Indoor Temperature and Ventilation On Sle...mentioning

confidence: 99%

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Experimental study of the negative effects of raised bedroom temperature and reduced ventilation on the sleep quality of elderly subjects

et al. 2022

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Aging populations are a world-wide concern. The Chinese demographic statistics announced in March 2021 showed that the percentage of the population 60 years old or more in China was 18.7% (260 million). People experience many physiological and psychological changes in old age, including a decrease in sleep quality and quantity and altered sleep structure. 1 Sleep disturbance of about 50% has been observed among the elderly in many countries. [2][3][4][5][6][7] Sleep disturbance is detrimental to both the physical and mental

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confidence: 90%

Section: Experimental Designmentioning

confidence: 99%

Section: Combined Effect Of Indoor Temperature and Ventilation On Sle...mentioning

confidence: 99%

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Experimental study of the negative effects of raised bedroom temperature and reduced ventilation on the sleep quality of elderly subjects

et al. 2022

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“…Studies exploring the effects of IAQ on sleep were rare, especially those that used ACT, 171 probably because ACT was generally applied in field studies, where the bedroom environment was difficult to control precisely and the variability between samples is large, often resulting in multiple environmental factors affecting sleep at the same time. As such, the measurement of sleep quality under multiple environmental influences cannot be ignored either 5,11,24,172–178 …”

Section: Common Assessment Of Sleep Qualitymentioning

confidence: 99%

Objective sleep assessments for healthy people in environmental research: A literature review

Lian

2022

Indoor Air

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To date, although many studies had focused on the impact of environmental factors on sleep, how to choose the proper assessment method for objective sleep quality was often ignored, especially for healthy subjects in bedroom environment. In order to provide methodological guidance for future research, this paper reviewed the assessments of objective sleep quality applied in environmental researches, compared them from the perspective of accuracy and interference, and statistically analyzed the impact of experimental type and subjects' information on method selection. The review results showed that, in contrast to polysomnography (PSG), the accuracy of actigraphy (ACT), respiratory monitoring‐oxygen saturation monitoring (RM‐OSM), and electrocardiograph (ECG) could reach up to 97%, 80.38%, and 79.95%, respectively. In terms of sleep staging, PSG and ECG performed the best, ACT the second, and RM‐OSM the worst; as compared to single methods, mix methods were more accurate and better at sleep staging. PSG interfered with sleep a great deal, while ECG and ACT could be non‐contact, and thus, the least interference with sleep was present. The type of experiment significantly influenced the choice of assessment method (p < 0.001), 85.3% of researchers chose PSG in laboratory study while 82.5% ACT in field study; moreover, PSG was often used in a relatively small number of young subjects, while ACT had a wide applicable population. In general, researchers need to pay more attention at selection of assessments in future studies, and this review can be used as a reliable reference for experimental design.

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“…Controlling the bedroom environment can improve the sleep [11], which is particularly important in highaltitude areas where sleep problems are widespread. Therefore, this study focused on bedroom environment on Qinghai-Tibet Plateau and the impact of environmental controls on it.…”

Section: Introductionmentioning

confidence: 99%

Field Measurements of Bedroom Environment in Winter and Summer on Qinghai-Tibet Plateau

Zhang

Li²,

Yan³

et al. 2022

E3S Web Conf.

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Field measurements of the bedroom environment on Qinghai-Tibet Plateau was conducted by continuously measuring the air temperature, relative humidity, and CO2 concentration in the bedrooms of 197 residents (100 in winter and 97 in summer) for 7 days. And the daily environmental controls of residents were recorded. The results showed that the night-time thermal environment in bedrooms on the Qinghai-Tibet Plateau was more warmer and wetter in summer than in winter, but the CO2 concentration was lower in winter. On both winter and summer nights, drops in air temperature, relative humidity and CO2 concentration in the bedrooms were found when doors or windows were opened, increases in relative humidity and CO2 concentration in bedrooms were found when there were more occupants in the bedrooms. This study also found there was a greater reduction of CO2 concentrations when doors or windows were opened in the bedrooms of multiple occupants compared to the bedrooms of a single occupant. And on winter nights, the humidity increase in the bedrooms caused by the action of the humidifier was not affected by the status of doors and windows.

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Association of bedroom environment with the sleep quality of elderly subjects in summer: A field measurement in Shanghai, China

Cited by 23 publications

References 32 publications

Experimental study of the negative effects of raised bedroom temperature and reduced ventilation on the sleep quality of elderly subjects

Experimental study of the negative effects of raised bedroom temperature and reduced ventilation on the sleep quality of elderly subjects

Objective sleep assessments for healthy people in environmental research: A literature review

Field Measurements of Bedroom Environment in Winter and Summer on Qinghai-Tibet Plateau

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