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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