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Table 5 Slopes (95 % Confidence Intervals) from mixed-effect modelsa between percent changes in health effects and pollutants

From: Repeated measures of inflammation, blood pressure, and heart rate variability associated with traffic exposures in healthy adults

  PM2.5 PM2.5 EC PM2.5 OC PM2.5 PM2.5 EC PM2.5 OC
  Post 24 h
Respiratory measurements
eNO -0.38 (-1.06,0.31) -1.37 (-3.99.1.25) -2.08 (-3.70,-0.46) 0.87 (-0.09,1.82) -0.14 (-4.03,3.74) -2.14 (-4.49,0.21)
Inflammatory measurements
CRP 0.32 (-1.37,2.01) 1.17 (-5.42,7.75) -0.29 (-4.41,3.83) -1.87 (-4.37,0.64) -4.97 (-14.82,4.88) -0.44 (-6.57,5.69)
SAA -0.29 (-1.57,0.99) -1.15 (-6.00,3.70) -0.90 (-4.06,2.26) -2.59 (-4.53,-0.64) -8.03 (-15.55,-0.52) -5.47 (-10.23,-0.72)
sICAM -0.44 (-1.80,0.92) -0.98 (-6.06,4.09) -1.13 (-4.41,2.14) -1.21 (-2.52,0.09) -0.74 (-5.85,4.37) -2.13 (-5.43,1.17)
IL-1β 2.66 (-2.29,7.60) 2.32 (-17.15,21.79) 4.38 (-16.15,7.40) 3.82 (-8.12,15.76) 55.09 (10.91,99.27) -2.23 (-31.45,26.99)
IL-8 0.37 (-0.77,1.52) -3.80 (-8.21,0.62) -1.23 (-3.93,1.48) 0.47 (-1.09,2.02) -1.26 (-7.45,4.92) -1.92 (-5.71,1.87)
Cortisol -0.37 (-2.02,1.28) -0.35 (-6.88,6.18) 1.94 (-1.85,5.72) -1.06 (-4.18,2.05) -12.56 (-25.64,0.51) 4.80 (-2.34,11.94)
Blood pressure measurements
SBP -0.04 (-0.31,0.24) -1.65 (-2.62,-0.68) -0.06 (-0.72,0.59) -0.17 (-0.48,0.14) -1.70 (-2.81,-0.58) -0.28 (-1.02,0.47)
DBP -0.11 (-0.41,0.19) -0.74 (-1.88,0.40) 0.33 (-1.05,0.39) -0.25 (-0.67,0.18) -1.02 (-2.65,0.61) -0.82 (-1.86,0.22)
PP 0.04 (-0.80,0.89) -4.43 (-7.53,-1.32) 0.28 (-1.73,2.29) -0.30 (-1.17,0.58) -3.99 (-7.77,-0.70) 0.69 (-1.40,2.78)
MAP -0.07 (-0.32,0.17) -1.11 (-2.00,-0.22) -0.20 (-0.78,0.38) -0.20 (-0.50,0.11) -1.28 (-2.43,-0.14) -0.56 (-1.31,0.18)
Heart rate variability measurements
SDNN 0.09 (-0.83,1.01) 0.15 (-3.26,3.57) 0.00 (-2.07,2.07) -0.39 (-1.28,0.51) -0.90 (-4.34,2.55) 0.70 (-1.27,2.68)
rMSSD -0.03 (-0.89,0.82) -1.86 (-4.99,1.28) -0.17 (-2.07,1.73) -0.82 (-1.82,0.18) -4.35 (-7.89,-0.81) 0.02 (-2.26,2.30)
HF 0.13 (-2.01,2.27) 0.04 (-7.86,7.94) 4.57 (-0.04,9.18) -0.05 (-3.77,3.67) -7.57 (-21.92,6.78) -0.38 (-8.50,7.74)
LF -0.84 (-4.88,3.20) -3.22 (-19.10,12.66) -0.31 (-9.17,8.56) 0.63 (-2.55,3.81) 6.67 (-5.66,18.99) -0.24 (-7.19,6.71)
LF:HF 2.09 (-11.63,15.81) 24.47 (0.93,48.00) 1.15 (-12.55,14.84) 1.99 (-15.39,19.36) 26.71 (3.82,49.60) 4.73 (-9.13,18.59)
Heart rate -0.01 (-0.36,0.34) 0.65 (-0.59,1.88) 0.14 (-0.61,0.90) 0.16 (-0.25,0.57) 1.63 (0.25,3.00) -0.46 (-1.36,0.45)
  1. aThe mixed effect model adjusted for apparent temperature, location, and random subject effects
  2. Percent change was calculated between the pre-exposure measurement and each subsequent measurement (i.e. post or 24 hrs post)