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Table 2 Exposure to air pollutants (previous year, overall) and risks of wheezing

From: Air pollution, fetal and infant tobacco smoke exposure, and wheezing in preschool children: a population-based prospective birth cohort

  Odds ratio of wheezing (95% Confidence Interval)
  Age 1 year Age 2 years Age 3 years Overall
PM 10     
Crude 1.07 (0.77, 1.50) 1.54 (0.90, 2.61) 1.00 (0.51, 1.95) 1.28 (0.85, 1.91)
Adjusted 1.21 (0.84, 1.74) 1.49 (0.83, 2.66) 0.90 (0.43, 1.91) 1.28 (0.83, 1.98)
NO 2     
Crude 1.01 (0.85, 1.20) 1.04 (0.85, 1.27) 1.03 (0.79, 1.33) 1.05 (0.92, 1.19)
Adjusted 1.07 (0.89, 1.29) 1.04 (0.83, 1.29) 0.97 (0.72, 1.30) 1.07 (0.93, 1.23)
  1. Values are odds ratios (95% confidence interval) from logistic regression models representing the risks of wheezing per 10 μg/m3 increase in PM10 or NO2. The overall effect is from generalized estimating equation models, based on average air pollution levels from birth until the age of 3 years with wheezing at the ages of 1, 2 and 3 years combined.
  2. Models are adjusted for maternal age, education, parity, smoking, smoking of the partner, history of asthma or atopy and children’s sex, gestational age, birth weight, ethnicity, breastfeeding, daycare attendance, pet keeping and lower respiratory tract infections at the corresponding ages.