Table 1 Summary descriptive statistics on the average number of daily deaths and light at night levels in 579 Chinese counties, 2015–2019
From: Light at night and cause-specific mortality risk in Mainland China: a nationwide observational study
Average daily death | Mean (SD) | Range | Median (IQR) |
|---|---|---|---|
All-cause death | 4015 (719) | 22–7145 | 3848 (788) |
External | 291 (39) | 2–456 | 287 (42) |
Natural | 3724 (695) | 20–6697 | 3558 (758) |
Neuron system | 51 (13) | 2–98 | 49 (16) |
Digestive system | 92 (17) | 1–162 | 90 (20) |
Cancer | 971 (112) | 3–1450 | 962 (121) |
Urinary system | 45 (11) | 0–90 | 44 (13) |
Cardiovascular | 1819 (398) | 5–3469 | 1725 (448) |
Respiratory system | 466 (137) | 5–974 | 422 (157) |
Average daily LAN (nW/cm2/sr) | |||
 National | 4.39 (3.63) | 1.02–35.46 | 2.92 (2.88) |
 Low-economic level region | 3.49 (3.42) | 0.71–31.59 | 1.85 (2.91) |
 Median-economic level region | 3.67 (3.56) | 0.70–30.20 | 2.15 (2.61) |
 High-economic level region | 6.38 (4.04) | 1.34–49.90 | 5.20 (3.33) |
 Low LAN level | 2.23 (2.98) | 0.30–30.30 | 0.75 (2.29) |
 Median LAN level | 3.15 (4.22) | 0.42–36.16 | 1.10 (3.01) |
 High LAN level | 8.15 (3.84) | 2.24–44.06 | 7.17 (3.58) |
Average daily PM2.5(µg/m3) | 35.18 (13.97) | 15.13–104.74 | 31.21 (16.64) |
Average daily temperature (°C) | 16 (9) |  − 8–29 | 18 (17) |
Average daily humidity (%) | 61.20 (7.73) | 34.05–79.26 | 62.12 (11.72) |