Relationship quality and educational attainment links to development of cardiometabolic morbidity and multimorbidity across middle adulthood

The prevalence of cardiometabolic morbidity (e.g., high blood pressure, heart attack, stroke, type 2 diabetes) and multimorbidity development (2 or more cardiometabolic morbidities) are rapidly growing in the US. Cardiometabolic morbidity and multimorbidity are linked to poor well-being outcomes, high healthcare costs, and mortality. There is little known about cardiometabolic multimorbidity health disparities, particularly regarding mutable factors that might be targeted in future health interventions. In the present study, using a biopsychosocial framework (Biobehavioral Family Model), we examine whether cardiometabolic morbidity and multimorbidity development are linked to premorbid family and marital relationships and if it differs depending on socioeconomic status (i.e., educational attainment) using three waves of Midlife in the US (N = 4951). We assessed cardiometabolic development with three conceptualizations: number of cardiometabolic morbidities (i.e., count variable), individual cardiometabolic morbidities (i.e., diabetes, high blood pressure, stroke, heart attack), and severity of cardiometabolic multimorbidity (e.g., 3+ vs. zero morbidities). Family strain increased the number of cardiometabolic morbidities (OR = 1.17) and the severity of multimorbidity (e.g., 3+ morbidities: OR = 1.38). People with a high school education experienced family support as a buffer to the negative health impact of education level. Generally, marital quality appeared less impactful on cardiometabolic morbidity and multimorbidity development compared to family strain. Positive and negative family characteristics appear to function differently across educational attainment. These findings indicate that adults' non-intimate family relationships predict important outcomes such as diabetes, heart attack, stroke, and cardiometabolic multimorbidity and should be considered targets for preventative health interventions.