Table 3 |
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|
Associations between the two road measures and three indicators of social class (mother and household smoking, and mother's education) |
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|
Traffic measure |
Dependent variable |
Road type |
OR |
95% CI |
P-value |
|
|
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|
Distance to road (km) |
Mother's |
Freeway |
0.95 |
0.91,1.00 |
0.04 |
|
smoking |
Highway |
0.97 |
0.94, 1.01 |
0.12 |
|
|
Main road |
1.01 |
0.83, 1.23 |
0.94 |
||
|
|
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|
Household |
Freeway |
0.94 |
0.91, 0.98 |
0.004 |
|
|
smoking |
Highway |
0.99 |
0.96, 1.03 |
0.70 |
|
|
Main road |
1.14 |
0.97, 1.35 |
0.12 |
||
|
|
|||||
|
Mother's |
Freeway |
0.99 |
0.95, 1.03 |
0.57 |
|
|
education |
Highway |
1.01 |
0.98, 1.05 |
0.47 |
|
|
Main road |
1.10 |
0.92, 1.32 |
0.29 |
||
|
|
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|
Number of road segments within 400 metres |
Mother's smoking |
Freeway |
0.83 |
0.59, 1.17 |
0.29 |
|
Highway |
1.00 |
0.82, 1.24 |
0.96 |
||
|
Main road |
1.02 |
0.98, 1.06 |
0.31 |
||
|
|
|||||
|
Household |
Freeway |
0.91 |
0.72, 1.15 |
0.44 |
|
|
smoking |
Highway |
1.10 |
0.92, 1.31 |
0.29 |
|
|
Main road |
0.99 |
0.96, 1.03 |
0.75 |
||
|
|
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|
Mother's |
Freeway |
1.03 |
0.83, 1.29 |
0.77 |
|
|
education |
Highway |
1.08 |
0.89, 1.31 |
0.43 |
|
|
Main road |
1.01 |
0.97, 1.05 |
0.53 |
||
|
|
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|
Odds ratios are on a scale of per km for distance, and per segment for the number of roads. OR = odds ratio, CI = confidence interval |
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|
Barnett et al. Environmental Health 2011 10:26 doi:10.1186/1476-069X-10-26 |
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