An epidemiologic analysis was accomplished of cardiovascular-renal (C-V-R) mortality rates by age-race-sex-place of residence for the city of Chicago (1953) and the state of Illinois (1951). The place of residence classification was based on income for the city of Chicago, and urban-rural differentiation for the state of Illinois. No significant differences were noted in C-V-R mortality rates-including rates for arteriosclerotic heart disease (ASHD)-in the Chicago population groups stratified by income. Residents of rural Illinois exhibited lower C-V-R and ASHD mortality rates than Chicagoans. However, these categories remained leading causes of death in middle-aged residents of rural Illinois.
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