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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.