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Table 3 Asthma symptoms, distance from refinery (km) and meteorologically estimated exposure (MEE) (hr/km2)* (N = 2,361)

From: Meteorologically estimated exposure but not distance predicts asthma symptoms in schoolchildren in the environs of a petrochemical refinery: a cross-sectional study

Outcome variable Exposure variable Odds ratio 95% CI IQR standardised odds ratio IQR standardised 95% CI
Need to bring inhaler to school MEE 2.26 1.27 - 4.04 1.22 1.06 - 1.40
  Distance 0.93 0.81 - 1.07 0.89 0.72 - 1.11
Ever wheeze at rest (1a)** MEE 1.81 1.18 - 2.79 1.15 1.04 - 1.28
  Distance 1.06 0.97 - 1.16 1.10 0.95 - 1.27
Recent wheezing at rest (1b) MEE 1.62 0.78 - 3.36 1.12 0.94 - 1.34
  Distance 0.93 0.79 - 1.09 0.89 0.70 - 1.14
Frequent wheezing at rest (1c) MEE 2.74 1.24 - 6.04 1.27 1.05 - 1.54
  Distance 0.95 0.80 - 1.13 0.93 0.71 - 1.21
Ever wake with wheezing at night (2a) MEE 1.13 0.74 - 1.73 1.03 0.93 - 1.14
  Distance 1.07 0.98 - 1.17 1.11 0.97 - 1.28
Recent waking with wheezing at night (2b) MEE 3.29 1.29 - 8.37 1.33 1.06 - 1.66
  Distance 0.97 0.82 - 1.15 0.95 0.74 - 1.24
Frequent waking with wheezing at night (2c) MEE 1.49 0.77 - 2.89 1.10 0.94 - 1.29
  Distance 1.05 0.90 - 1.23 1.08 0.86 - 1.37
Ever wheeze after exercise (3a) MEE 1.40 0.89 - 2.21 1.08 0.97 - 1.21
  Distance 0.98 0.89 - 1.09 0.98 0.84 - 1.14
Recent wheezing after exercise (3b) MEE 1.91 0.85 - 4.31 1.17 0.96 - 1.42
  Distance 0.89 0.75 - 1.05 0.83 0.64 - 1.08
Frequent wheezing after exercise (3c) MEE 1.75 0.73 - 4.20 1.14 0.93 - 1.41
  Distance 0.90 0.74 - 1.10 0.86 0.63 - 1.16
Ever wake with night cough (4a) MEE 1.20 0.78 - 1.85 1.04 0.94 - 1.16
  Distance 0.96 0.88 - 1.06 0.95 0.82 - 1.09
Recent waking with coughing at night (4b) MEE 1.74 0.83 - 3.66 1.14 0.96 - 1.36
  Distance 1.00 0.86 - 1.16 1.00 0.79 - 1.26
Frequent waking with coughing at night (4c) MEE 1.99 0.87 - 4.54 1.18 0.97 - 1.44
  Distance 0.98 0.82 - 1.17 0.97 0.73 - 1.28
Ever distressing wheeze at rest (5a) MEE 1.36 0.83 - 2.23 1.08 0.96 - 1.21
  Distance 1.01 0.91 - 1.13 1.02 0.86 - 1.20
Recent distressing wheeze at rest (5b) MEE 1.83 0.75 - 4.49 1.16 0.93 - 1.43
  Distance 0.98 0.81 - 1.18 0.97 0.72 - 1.30
Frequent distressing wheeze at rest (5c) MEE 2.66 0.94 - 7.55 1.26 0.98 - 1.62
  Distance 0.97 0.77 - 1.21 0.95 0.67 - 1.35
  1. CI: confidence interval. IQR: interquartile range. Recent: in the last 12 months. Frequent: at least monthly in the last 12 months. Associations with confidence intervals which exclude the null in bold.
  2. *Adjusted for passive smoking, family atopy and GIS distance to nearest major road.
  3. ** Video sequence number in parentheses.