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Table 2 Summary of parameters of the study population during the recording period

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

Sleep parameters

Mean (SD)

Median (IQR)

Min

Max

Total sleep duration, min

419.69 (87.29)

423 (366,476)

180

720

Deep sleep duration, min

108.49 (49.77)

104 (72,139)

8

505

Light sleep duration, min

311.20 (80.44)

311 (257,364)

37

680

Deep sleep duration/light sleep duration, %

0.38 (0.24)

0.34 (0.22,0.49)

0.01

9.22

Deep sleep duration/total sleep duration, %

25.94 (10.87)

25.14 (18.12, 32.87)

1.37

91.65

Times of WASO

0.90 (1.10)

1 (0, 1)

0

17

Times of WASO per hour of sleep

0.13 (0.16)

0.12 (0, 0.20)

0

3.31

Duration of WASO, min

9.27 (19.69)

0 (0, 7)

0

456

Duration of WASO/total sleep duration, %

2.28 (5.09)

0 (0, 1.73)

0

86.51

  1. Abbreviations: IQR Interquartile range, SD Standard deviation, WASO Wake after sleep onset