. Author manuscript; available in PMC: 2010 Mar 1.

Published in final edited form as: J Allergy Clin Immunol. 2009 Jan 18;123(3):626–631. doi: 10.1016/j.jaci.2008.10.062

Table 4.

Roadway distances as predictors of general health status, lung function, and asthma quality of life

	PCS 12	FEV₁	QOL
All Subjects (n=176)	β (CI 95%)	β (CI 95%)	β (CI 95%)
Simple Model
Distance to Nearest Roadway (m)	0.075 (−0.051, 0.202)	0.102 (0.052, 0.455)^a	NA
Distance to Nearest Major Roadway (100 m)	0.003 (−0.055, 0.061)	0.106 (0.014, 0.199)^a	NA
Household Income, Smoking Status and BMI Adjusted Model
Distance to Nearest Roadway (m)	0.093 (−0.031, 0.217)	0.223 (0.012, 0.434)^a	NA
Distance to Nearest Major Roadway (100 m)	0.010 (−0.045, 0.0645)	0.113 (0.020, 0.205)^a	NA
Asthma Subjects Only (n=144)^†	β (CI 95%)	β (CI 95%)	β (CI 95%)
Simple Model
Distance to Nearest Roadway (m)	0.081 (−0.053, 0.216)	0.106 (0.045, 0.466)^a	−0.046(−0.22, 0.13)
Distance to Nearest Major Roadway (100 m)	0.017 (−0.050, 0.083)	0.136 (0.033, 0.239)^a	−0.03 (−0.11, 0.06)
Household Income, Smoking Status and BMI Adjusted Model
Distance to Nearest Roadway (m)	0.103 (−0.029, 0.235)	0.219 (−0.003, 0.441)	−0.89 (−0.27, 0.09)
Distance to Nearest Major Roadway (100 m)	0.027 (−0.035, 0.090)	0.145 (0.042, 0.248)^a	−0.04 (−0.12, 0.04)

SF-12 PCS = Short Form-12 Physical Component Scale; higher score reflects better health status

FEV₁ % = forced expiratory volume in one second percent predicted

Asthma QoL = Marks asthma-specific quality of life score; higher score reflects poorer QoL

p<0.05

^†

One subject with missing QoL data excluded from analyses for FEV₁ and SF-12 as well