Table 4.

Unadjusted and Adjusted Linear Regression Models of Mean and Maximum Carotid IMT and Family and Neighborhood SEP

LSAC Wave 6 SEP Measures, at Age 10–11 Y	Mean Carotid IMT		Maximum Carotid IMT
	Regression Coefficient, μm (95% CI)	P Value	Regression Coefficient, μm (95% CI)	P Value
Unadjusted
Family (per quartile lower)	1.0 (−1.7, 3.7)	0.46	3.7 (1.6, 5.8)	0.001
Neighborhood (per quartile lower)	1.3 (−1.5, 4.1)	0.38	2.6 (0.4, 4.8)	0.02
Model 1—age‐ and sex‐adjusted
Family (per quartile lower)	1.1 (−1.6, 3.8)	0.41	3.8 (1.6, 5.9)	0.001
Neighborhood (per quartile lower)	1.2 (−1.6, 4.0)	0.40	2.6 (0.3, 4.8)	0.02
Model 2—additional covariates
Family (per quartile lower)	0.9 (−2.1, 3.9)	0.56	3.3 (1.0, 5.7)	0.005
Neighborhood (per quartile lower)	0.5 (−2.5, 3.5)	0.74	2.1 (−0.3, 4.4)	0.08
Model 3—single model
Family (per quartile lower)	0.8 (−2.3, 3.9)	0.61	3.0 (0.6, 5.4)	0.02
Neighborhood (per quartile lower)	0.3 (−2.9, 3.4)	0.87	1.2 (−1.3, 3.6)	0.34

Regression coefficients are expressed as the μm difference in carotid IMT per quartile lower in SEP measure. Model 1 models were adjusted for age and sex, Model 2 for age, sex, body mass index z score, mean arterial blood pressure, pubertal category, minimal intima‐intima lumen diameter and exposure to passive smoking. The final Model 3 included both family and neighborhood SEP in the same model, along with all other covariates used in Model 2. Family SEP is a composite measure, standardized within each LSAC wave, summarizing parental education, occupation and household income. Neighborhood SEP uses Australian census‐derived data to generate a Socioeconomic Indexes For Areas (SEIFA) advantage/disadvantage score, according to family residential address postcode. CI indicates confidence interval; IMT, intima‐media thickness, LSAC, Longitudinal Study of Australian Children; SEP, socioeconomic position.