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Table 3 Distribution of meteorological and air pollutant exposure levels in patients with IPF

From: Exposure to PM2.5 is a risk factor for acute exacerbation of surgically diagnosed idiopathic pulmonary fibrosis: a case–control study

Air pollutants Acute exacerbation No acute exacerbation
Mean Min Median Max Mean Min Median Max
Temperature (°C) 14.1 − 3.3 13.4 28.0 16.3 − 9.4 16.4 30.0
Humidity (%) 67.4 42.7 68.6 87.0 66.8 36.0 67.0 87.0
SO2 (ppb) 2.6 0.0 2.6 12.5 2.8 0.0 3.0 8.0
NO (ppb) 10.8 1.1 3.4 98.0 5.6 1.0 4.0 69.0
NO2 (ppb) 16.7 3.1 14.7 37.0 14.9 2.0 14.0 46.0
NOX (ppb) 26.4 2.5 16.5 133.0 20.5 4.0 17.0 106.0
CO (ppb) 460.4 81.6 412.1 2101.0 411.4 100.0 400.0 1700.0
O3 (ppb) 28.0 6.2 28.2 47.6 29.2 5.0 28.0 57.0
PM2.5 (µg/m3) 17.0 6.0 16.8 42.6 15.3 1.6 14.8 43.6
PM10 (µg/m3) 20.1 7.7 19.3 30.3 20.7 6.0 20.0 51.0
  1. SO2 sulfur dioxide, NO nitric oxide, NO2 nitrogen dioxide, NOX nitrogen oxides, CO carbon monoxide, O3 ozone, PM2.5 particulate matter < 2.5 µm, PM10 particulate matter < 10 µm