Skip to main content

Table 2 Environmental characteristics during the study period

From: The relationship of air pollution and surrogate markers of endothelial dysfunction in a population-based sample of children

  Mean(SD) Range
Temperature (°C) 9.35 (4.61) -1.1-15.4
Humidity (%) 49.45(5.17) 22.10-76.15
Wind speed (Km/h) 10.25 (2.65) 5.41-21.25
Sunlight duration (h) 8.45 (1.15) 7.05-11.10
PM 10 (μg/m3) 120.48 (62.83) 44.58-284.12
CO (ppm) 3.91(2.51) 1.43-10.90
SO 2 (ppb) 43.72(30.56) 5.50-89.9
NO 2 (ppb) 59.39(35.55) 20.60-121.85
O 3 (ppb) 33.60 (10.23) 11.18-56.81
PSI 74.61(30.35) 39-136.2
  1. SD: standard deviation; PM10: particular matter 10 (acceptable level: 50 μg/m3); CO: carbon monoxide (acceptable level: 9 ppm); SO2: sulfur dioxide (acceptable level: 0.03 ppb)
  2. NO2: Nitrogen dioxide (acceptable level: 0.05 ppb); O3: ozone (acceptable level: 0.08 ppb)
  3. PSI; Pollution Standards Index (0-50: Good; 51-100: Moderate; 101-199: Unhealthful; 200-299: Very unhealthful; ≥ 300: Hazardous)