Table 4.

Relative risk associated with changes in environmental conditions: Children’s insurance-status (A) and race/ethnicity (B)

	Parameter		b	SE	p	RR3	LCI	UCI
A	Intercept	Medicaid*	−0.556	0.142	0.000	0.57	0.43	0.76
	Intercept	No Insurance*	−0.506	0.352	0.151
	Intercept	No Insurance+	0.050	0.355	0.887
	Temperature	Medicaid*	0.004	0.003	0.116
	Temperature	No Insurance*	−0.001	0.007	0.919
	Temperature	No Insurance+	−0.005	0.007	0.466
	Dew Point	Medicaid*	−0.003	0.003	0.306
	Dew Point	No Insurance*	0.009	0.008	0.310
	Dew Point	No Insurance+	0.012	0.009	0.160
	NO2 Lag 1	Medicaid*	0.321	2.585	0.901
	NO2 Lag 1	No Insurance*	16.490	6.724	0.014	1.39	1.07	1.81
	NO2 Lag 1	No Insurance+	16.169	6.773	0.017	1.38	1.06	1.80
		Reference group: Private*
		Reference group: Medicaid+
B	Intercept	Black*	0.813	0.219	0.000	2.25	1.47	3.46
	Intercept	Hispanic*	0.083	0.164	0.611
	Intercept	Black+	0.729	0.231	0.002	2.07	1.32	3.26
	Temperature	Black*	0.004	0.004	0.304
	Temperature	Hispanic*	0.009	0.003	0.004
	Temperature	Black+	−0.005	0.004	0.278
	Dew Point	Black*	0.005	0.005	0.276
	Dew Point	Hispanic*	0.002	0.004	0.580
	Dew Point	Black+	0.003	0.005	0.526
	NO2 Lag 0	Black*	−6.488	3.915	0.098
	NO2 Lag 0	Hispanic*	2.539	2.965	0.392
	NO2 Lag 0	Black+	−9.026	4.130	0.029	0.83	0.71	0.98
		Reference group: White*
		Reference group: Hispanic+

Notes: (1) Intercepts are corrected for population. (2) Models were run separately for each of the two reference groups but are combined for ease of interpretation. (3) RR (relative risk), LCI (lower confidence interval) and UCI (upper confidence interval) are reported for the variables of interest. For the intercepts, LCI and UCI are the upper and lower 95% Wald confidence bounds for RR=exp(b) of specified subgroups at seasonal mean NO₂, predicted by the time series regression model. For the slopes, LCI and UCI are the upper and lower 95% Wald confidence bounds for the RR of specified subgroups at .02 ppm of NO₂ exceedance.