Socioeconomic status (SES) is recognized as a key social environmental factor because it has implications for access to resources that help individuals care for themselves and others. Few studies have examined the association of SES with CKD in high-risk populations.
Single-site longitudinal population-based cohort
Setting and Participants
The data for this study were drawn from the baseline examination of the Jackson Heart Study. The analytic cohort consisted of 3,430 African American men and women living in the tri-county area of the Jackson, Mississippi metropolitan areas with complete data to determine CKD status.
High SES (defined as having a family income at least 3.5 times the poverty level or having at least one undergraduate degree)
Outcomes and Measurements
CKD (defined as the presence of albuminuria or reduced estimated glomerular filtration rate (eGFR) <60 ml/min/1.73m2). Associations were explored through bivariable analyses and multivariable logistic regression analyses adjusting for CKD and cardiovascular disease risk factors as well as demographic factors.
The prevalence of CKD in the Jackson Heart Study was 20% (865/3430 participants). The proportion of the Jackson Heart Study cohort with albuminuria and decreased eGFR was 12.5% (429/3430 participants) and 10.1% (347/3430 participants) respectively. High SES was inversely associated with CKD. The odds of having CKD were 41% lower for affluent participants than their less affluent counterparts. There were no statistically significant interactions between sex and education or income although subgroup analysis showed that high income was associated with CKD among male (OR 0.47, CI 0.23–0.97) but not female (OR 0.64, CI 0.40–1.03) participants.
Models were estimated using cross-sectional data.
CKD is associated with SES. Additional research is needed to elucidate the impact of wealth and social contexts in which individuals are embedded, and the mediating effects of sociocultural factors.