. Author manuscript; available in PMC: 2012 Jul 1.

Published in final edited form as: Environ Res. 2011 Apr 29;111(5):677–684. doi: 10.1016/j.envres.2011.04.004

Table 5.

Odds ratio of wheeze severity for 10% increase in developed land-use within buffer, by socio-economic status (SES)

	Lower SES (income-based) (Odds Ratio and 95 % Confidence Interval)	Higher SES (income-based) (Odds Ratio and 95 % Confidence Interval)
Interaction term with urban land-use and income-based SES	1.07 (0.99, 1.14)	0.92 (0.81, 1.05)
Interaction term with urban land-use and education-based SES	1.26 (1.01, 1.57)	1.07 (1.00, 1.15)

Note: Income-based SES has lower SES at annual income less than $20,000, and higher SES at ≥ $20,000. Education-based SES has lower SES at maternal educational attainment less than high school diploma, and higher SES at least high school diploma. Results are based on the proportional odds model with health outcome defined as the severity of wheeze symptoms (none, mild, severe in the first year of life). Models adjust for infants’ gender, race, parental asthma history, family income, smoking in the home, presence of persistent mold, and maternal educational attainment.