There were 1546 individuals for atherosclerosis, 1544 for arteriosclerosis, and 1554 for infarcts. Results are age-standardized to the overall distribution of the study population. χ2 Tests across the birth epochs yielded P < .001 for atherosclerosis, P < .001 for arteriosclerosis, P = .35 for gross infarctions, and P = .007 for microinfarcts.