Table 4. Results from the multivariate regression adjusted for birth order, parental education and missing data.

	PROC GENMOD with repeated measures Correlated Data (Siblings)
	OR (CI)	p
Male	1.30 (0.96-1.74)	0.0854
Black	1.41 (0.96-2.07)	0.0809
Age 5-12	1.17 (0.87-1.58)	0.2897
Mom HS v. < HS	1.16 (0.84-1.61)	0.3637
Dad HS v. < HS	0.69 (0.46-1.02)	0.0626
Dad Current Smoker v. Never	1.12 (0.77-1.64)	0.5382
Mom Current Smoker v. Never	1.12 (0.79-1.58)	0.5242
Family Relationships Examined
Parent (either mother or father) Asthma and No Grandparent Asthma	1.96 (1.26-3.05)	0.0027
Parent Asthma and Grandparent Asthma	4.27 (2.39-7.65)	<.0001
No Parent Asthma and Grandparent Asthma	1.52 (0.98-2.35)	0.0593
Missing Parent Asthma and Grandparent Asthma	1.00 (0.06-17.65)	0.9977
Missing Parent Asthma and No Grandparent Asthma	4.23 (.75-24.06)	0.1035
Parent Asthma and Missing Grandparent Asthma	1.72 (0.91-3.23)	0.0925
No Parent Asthma and Missing Grandparent Asthma	0.67 (0.41-1.09)	0.1088

Note: Reference group in model is “No Parent Asthma and No Grandparent Asthma.” Parent asthma represents either maternal or paternal asthma status and grandparent asthma represents either grandmother or grandfather asthma. The model presented is adjusted for birth order, parental education and missing data. OR = odds ratio and CI = 95% confidence interval.