http://bmj.bmjjournals.com/cgi/content/short/321/7271/1262

"...Socioeconomic differences in coronary heart disease already exist in people in there 30's... The relative contribution of socioeconomic differences in risk factors in adulthood versus earlier life to the social class gradient in coronary heart disease is controversial. Socioeconomic position in childhood was a strong predictor of stroke and cancer mortality in the Boyd Orr cohort but it had only a weak association with mortality from coronary heart disease. Furthermore, there is no social class gradient in intermediate vascular outcomes such as arterial distensibility in children. We examined whether there is a social class difference in coronary heart disease in adults in early mid-life by using a sub-clinical measure of coronary artery disease coronary artery calcification..." (Au)