Skip to main content

Table 2 Mean level of air pollution on Asian dust- (visibility ≤10 km) and non-Asian dust days

From: Effects of Asian dust-derived particulate matter on ST-elevation myocardial infarction: retrospective, time series study

  Mean level on Asian dust days (n = 1301) Mean level on non-Asian dust days (n = 2875) P value
Air pollutant concentrations
 CO (ppm) 0.8 ± 0.4 0.6 ± 0.3 < 0.0001
 O3 (ppb) 31.6 ± 19.5 32.6 ± 16.9 0.102
 NO2 (ppb) 38.5 ± 12.9 31.3 ± 11.7 < 0.0001
 SO2 (ppb) 6.1 ± 2.7 5.1 ± 1.6 < 0.0001
 PM10 (μg/m3) 70.6 ± 41.8 42.3 ± 20.0 < 0.0001
 PM2.5 (μg/m3) 39.1 ± 17.1 22.1 ± 8.9 < 0.0001
Weather conditions
 Mean temperature (°C) 13.76 ± 9.22 11.95 ± 11.15 < 0.0001
 Relative humility (%) 70.9 ± 12.08 55.26 ± 13.36 < 0.0001
  1. CO carbon monoxide, O3 ozone, NO2 nitrogen dioxide, SO2 sulfur dioxide, PM10 particulate matter with a median aerodynamic diameter ≤ 10 μm; ppb, PM2.5, fine particulate air matter with an aerodynamic diameter < 2.5 μm; ppb, parts per billion; ppm, parts per million