Skip to main content

Table 4 Percent change a in FEV1 associated with an interquartile-range increase in personal levels of PM 2.5 , elemental carbon (EC), or elemental components of PM 2.5 , b stratified by group

From: Air pollution exposure and lung function in highly exposed subjects in Beijing, China: a repeated-measure study

  Office workers (observations = 118) Truck drivers (observations = 119)
  IQRc % change (95% CI) FDRd IQRc % change (95% CI) FDRd
PM2.5 78.08 0.37 (-1.60; 2.38) 0.961 86.63 -0.29 (-4.18; 3.75) 0.886
EC 5.86 -0.49 (-3.29; 2.39) 0.961 8.26 -1.93 (-6.58; 2.94) 0.541
K 0.55 2.00 (0.04; 3.99) 0.500 1.61 -0.97 (-8.79; 7.52) 0.886
S 6.98 -1.52 (-5.26; 2.36) 0.961 7.61 3.65 (-3.01; 10.77) 0.490
Fe 0.19 1.20 (-0.56; 2.98) 0.940 0.84 -4.10 (-8.48; 0.49) 0.170
Si 0.58 -0.18 (-2.00; 1.68) 0.961 2.73 -8.14 (-13.77; -2.14) 0.058
Al 0.33 -0.48 (-3.17; 2.28) 0.961 1.27 -6.64 (-11.53; -1.47) 0.058
Zn 0.17 0.65 (-1.12; 2.45) 0.961 0.31 2.08 (-2.49; 6.86) 0.541
Ca 0.21 -0.12 (-2.43; 2.24) 0.961 2.68 -4.34 (-7.83; -0.73) 0.058
Ti 0.02 0.07 (-2.61; 2.82) 0.961 0.05 -5.63 (-10.07; -0.96) 0.058
  1. aAdjusted for age, sex, BMI, number of cigarettes smoked during examination time, day of the week, time spent commuting to work, work hours per week, temperature, and dew point values. For exposures other than PM2.5, PM2.5 was also adjusted.
  2. bMeasured during work hours of the examination days using light-weight personal monitors.
  3. cPercent changes and 95% confidence intervals are scaled to the interquartile range (IQR) of the exposures.
  4. dFDR: Benjamini and Hochberg false discovery rate.