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Table 4 Associations between long-term exposure (2008–2012) to PM2.5 and NOX (per interquartile range) and low lung function among school children (7 to 13 years) in logistic regression analysis

From: The effect of industry-related air pollution on lung function and respiratory symptoms in school children

  Low FVCc Low FEV1c Low PEFc Low MMEFc Low FEV1/FVCc
OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI)
Model 1a (n = 559)
PM2.5 (0.56 μg/m3) 1.05 (0.64–1.70) 1.07 (0.69–1.65) 1.42 (1.01–1.99)* 1.00 (0.74–1.36) 0.97 (0.43–2.20)
NOX (7.43 μg/m3) 0.99 (0.49–1.99) 1.04 (0.56–1.95) 1.75 (1.07–2.87)* 1.13 (0.73–1.73) 1.17 (0.40–3.44)
Model 2b (n = 424)
PM2.5 (0.56 μg/m3) 1.34 (0.80–2.24) 1.26 (0.79–2.01) 1.37 (0.95–1.97) 1.00 (0.71–1.40) 0.88 (0.34–2.25)
NOX (7.43 μg/m3) 1.43 (0.66–3.12) 1.41 (0.70–2.86) 1.63 (0.94–2.82) 1.10 (0.68–1.79) 0.95 (0.27–3.40)
  1. aAdjusted for gender, age and operator
  2. bAdjusted for gender, age, operator, education parents, molds, passive smoking, allergy, ventilation, fireplace, pets, family history for asthma predisposition, proportion time exposed in the last five years and operator (smaller study population due to non-responders of the questionnaire)
  3. c< 85% predicted
  4. *P < 0.05, ** p < 0.01, *** p < 0.001