Table 2.

Simple logistic regression analyses for the association of being in a cluster by phenotype of lower respiratory illness and socioeconomic and housing characteristics at the census tract obtained from the 1980 US Census of Population and Housing.

Characteristic	Wheezing LRI Cluster		Viral LRI Cluster		RSV LRI Cluster
	OR	P	OR	P	OR	P
Socioeconomic Characteristics
Median Age (yrs)	0.89	0.002*	0.93	0.04	0.98	0.53
Foreign Born (%)	1.03	0.45	1.06	0.05	0.99	0.77
Male (%)	1.19	0.05	1.08	0.40	0.91	0.24
Minority Race (%)	1.01	0.22	1.02	0.06	0.99	0.36
Spanish Origin (%)	1.01	0.23	1.01	0.18	0.99	0.20
Per capita income (per $1000)	0.81	0.02	0.82	0.007	0.94	0.41
Family with single female head of house (%)	1.02	0.65	1.06	0.09	1.08	0.03
Do not speak English at home (%)	1.01	0.25	1.01	0.18	0.99	0.17
Unemployed 15 or more weeks (%)	0.97	0.32	1.01	0.58	0.94	0.01
≤12 years of school (%)	1.02	0.15	1.01	0.11	0.99	0.27
Population Density (1000 people/sq. mile)	1.00	0.64	1.01	0.08	1.03	0.007
Housing Characteristics
Mobile Homes	1.01	0.07	1.00	0.83	0.97	0.01
Attached Homes	1.00	0.55	1.00	0.76	1.03	<0.001*
Gas Heating	1.00	0.76	1.04	0.002*	1.04	0.006*
Gas Water Heating	1.00	0.93	1.04	0.003*	1.04	0.002*
Lacking complete plumbing facilities	0.98	0.85	1.03	0.79	1.17	0.05
Built before 1940	1.02	0.17	1.02	0.04	1.03	0.04
> 1 person per room	1.04	0.04	1.05	0.008	0.97	0.27

Note. OR = odds ratio;

^*indicates significance after Bonferroni correction (p<0.005 for SES and p<0.007 of housing characteristics).