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Table 6 Effect of ambient air pollutants for the 3-month rate of change in lung function in children by gender, Salamanca, Guanajuato 2004 - 2005

From: Impact of air pollution on pulmonary function and respiratory symptoms in children. Longitudinal repeated-measures study

  FVC (%) FEV1(%) PEF (%) FEV1/FVC
Models# Percent change (95%CI) Percent change (95%CI) Percent Change (95%CI) % (95%CI)
Girls     
One-pollutant model     
O3 8 hr-average & -0.21 (-0.84, 0.45) -0.34 (-1.21, 0.57) -0.27 (-1.55, 0.98) 0.24 (0.11, 0.37)*
PM10 24 hr-average § -0.23 (-1.26, 0.82) -0.37 (-0.56, -0.13) * -0.29 (-0.45, -0.14) * 0.11 (0.04, 0.18)*
SO2 24 hr-average -0.09 (-0.33, 0.18) -0.11 (-0.61, 0.42) -0.04 (-0.76, 0.65) 0.15 (0.03, 0.28)*
Two-pollutant models     
O3 8 hr-average & -0.12 (-0.46, 0.25) -0.14 (-0.37, 0.07) -0.11 (-0.45, 0.29) 0.19 (0.11, 0.27)*
PM10 24 hr-average § -0.23 (-0.75, 0.29) -0.27 (-0.48, -0.06)* -0.22 (-0.75, 0.31) 0.09 (-0.01, 0.19)
O3 8 hr-average & -0.18 (-0.62, 0.27) -0.23 (-0.42, -0.03) * -0.17 (-0.33, -0.02)* 0.23 (0.12, 0.34)*
SO2 24 hr-average -0.04 (-0.23, 0.14) 0.11 (-0.25, 0.45) -0.06 (-0.47, 0.33) 0.10 (0.03, 0.18)*
PM10 24 hr-average § -0.37 (-0.69, -0.01) * -0.13 (-0.44, 0.20) -0.25 (-0.47, -0.03) * 0.05 (-0.03, 0.14)
SO2 24 hr-average -0.07 (-0.58, 0.44) 0.06 (-0.48, 0.61) 0.03 (-0.65, 0.69) 0.18 (0.10, 0.26)*
Boys     
One-pollutant model     
O3 8-hr average & -0.11 (-0.64, 0.42) -0.36 (-0.61, -0.12)* -0.22 (-0.66, 0.21) 0.21 (0.09, 0.33)*
PM10 24-hr average § -0.24 (-0.53, 0.07) -0.43 (-0.76, -0.11)* -0.36 (-0.68, -0.04)* 0.02 (-0.05, 0.13)
SO2 24 hr-average 0.17 (-0.41, 0.76) 0.08 (-0.26, 0.42) -0.05 (-0.37, 0.28) 0.13 (0.02, 0.24)*
Two-pollutant models     
O3 8 hr-average & -0.06 (-0.50, 0.38) -0.15 (-0.43, 0.13) -0.22 (-0.77, 0.34) 0.14 (0.05, 0.23)*
PM10 24 hr-average § -0.20 (-0.59, 0.21) -0.66 (-1.08, -0.24)* -0.57 (-1.01, -0.14) * -0.003 (-0.05, 0.045)
O3 8 hr-average & -0.32 (-0.60, -0.04)* -0.41 (-0.78, -0.05) * -0.33 (-0.52, -0.15)* 0.16 (0.09, 0.24)*
SO2 24 hr-average 0.14 (-0.43, 0.72) 0.09 (-0.31, 0.50) -0.12 (-0.58, 0.34) 0.09 (0.02, 0.17)*
PM10 24 hr-average § -0.34 (-0.60, -0.10)* -0.29 (-0.72, -0.15)* -0.28 (-0.51, -0.06)* 0.03 (-0.08, 0.14)
SO2 24 hr-average 0.05 (-0.61, 0.72) 0.06 (-0.63, 0.74) 0.03 (-0.87, 0.93) 0.14 (0.04, 0.25)*
  1. Definition of abbreviations: CI = confidence interval; NO2 = nitrogen dioxide; O3 = ozone; PM10 = Particulate matter less than 10 μm in aerodynamic diameter
  2. # Mixed models adjusted for age, BMI, BMI square and residuals of the regression height on age. We used the log transformed version of the spirometric parameters
  3. &% deficits in lung function, in milliliters per IQR (18.8) increase in 3-month mean pollutant concentration
  4. § % deficits in lung function, in milliliters per IQR (50.60) increase in 3-month mean pollutant concentration
  5. % deficits in lung function, in milliliters per IQR (6.40) increase in 3-month mean pollutant concentration
  6. * p value < 0.05