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Fig. 3 | BMC Medicine

Fig. 3

From: The long-term and short-term effects of ambient air pollutants on sleep characteristics in the Chinese population: big data analysis from real world by sleep records of consumer wearable devices

Fig. 3

a–f Spatial distribution of long-term air pollutant concentration in participants’ residences. The red dots represent participants’ residential cities, and the color depth represents the concentration of each air pollutant. The World Health Organization air quality guidelines 2021 for PM2.5, PM10, NO2, O3, SO2, and CO concentrations were 5 μg/m3 (annual), 15 μg/m3 (annual), 10 μg/m3 (annual), 100 μg/m3(8-h average), 40 μg/m3 (24-h average), and 4 mg/m3 (24-h average), respectively

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BMC Medicine

ISSN: 1741-7015

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