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Table 4 Change in peak expiratory flow (PEF) for a 24-hour concentration of PM2.5 of 10 μ/m3

From: Effect of hourly concentration of particulate matter on peak expiratory flow in hospitalized children: A panel study

  Morning Evening
  (PEF at 7 a.m.) (PEF at 7 p.m.)
  Changes (l/minute) (95%CI) Changes (l/minute) (95%CI)
Single pollutant model* -2.96 (-4.55, -1.37) -4.42 (-7.11, -1.73)
2-pollutant model† -2.52 (-4.60, -0.44) -3.51 (-6.37, -0.65)
3-pollutant model‡ -1.59 (-3.61, 0.43) -2.36 (-7.59, 2.86)
  1. PM2.5: Particulate matter with a 50% cut-off of aerodynamic diameter ≤2.5 μm
  2. *Adjusted for sex, age, height, day of the week, temporal trends and temperature.
  3. †Adjusted for photochemical oxidant, sex, age, height, day of the week, temporal trends and temperature.
  4. ‡Adjusted for nitrogen dioxide, photochemical oxidant, sex, age, height, day of the week, temporal trends and temperature.