Agus Surachman1, Alexis R Santos2, Jonathan K Daw3, Lacy Alexander4, David M Almeida2, Christopher L Coe5. 1. Department of Human Development and Family Studies, The Pennsylvania State University, USA; Center for Healthy Aging, The Pennsylvania State University, USA. Electronic address: axs527@psu.edu. 2. Department of Human Development and Family Studies, The Pennsylvania State University, USA; Center for Healthy Aging, The Pennsylvania State University, USA. 3. Department of Sociology and Criminology, The Pennsylvania State University, USA. 4. Center for Healthy Aging, The Pennsylvania State University, USA; Department of Kinesiology, The Pennsylvania State University, USA. 5. Department of Psychology, University of Wisconsin-Madison, USA; Harlow Center for Biological Psychology, University of Wisconsin-Madison, USA.
Abstract
OBJECTIVE: Using cross-sectional data on Black and white adults, this analysis examined whether age-related decrements in kidney function across adulthood were associated with parental education, and whether the association was differentially influenced by race. Further, this study assessed racial differences in life course pathways from parental education to age-related decrements in kidney function, through current SES and health-related risk factors. METHOD: Data from the main survey and the Biomarker Project of the Midlife in the United States (MIDUS) Wave 2 and Refresher samples were combined, resulting in 1861 adults (54.5% female; age 25-84, Mage = 53.37) who self-identified as non-Hispanic Black (n = 326) and non-Hispanic white (n = 1535). Estimated glomerular filtration rate (eGFR) was based on serum creatinine, calculated using the CKD-EPI formula. Adults SES was based on education, income, and financial strains. Health-related risk factors included obesity, elevated blood pressure (BP), and insulin resistance. Hypotheses were tested by utilizing multiple linear regression and regression-based moderated mediation analysis. RESULTS: Lower parental education was associated with steeper age-related decrements in eGFR (B = 0.38, SE = 0.15, p = .013, 95%CI = 0.08, 0.68), due to higher eGFR among younger participants and lower eGFR among older participants. In addition, age-related decrements in kidney function were steeper among Black relative to white adults (B = 0.41, SE = 0.13, p < .01, 95%CI = 0.16, 0.66), driven by higher proportion of younger Black adults that met criterion for renal hyperfiltration. Furthermore, parental education and race were associated with age-related decrements in kidney function in an additive rather than interactive way. There were some racial differences in the life course pathways from parental education to age-related differences in eGFR, glucoregulation, and hypertension. Among Black adults, lower parental education was associated with elevated eGFR among younger participants through insulin resistance. Among white adults, lower parental education was linked to higher eGFR among younger adults and lower eGFR among older adults, and the association was mediated by current SES, elevated BP, and insulin resistance. DISCUSSION: Early life SES can have a long-lasting influence on the preclinical renal senescence that is associated with the normal biology of aging for both Black and white adults.
OBJECTIVE: Using cross-sectional data on Black and white adults, this analysis examined whether age-related decrements in kidney function across adulthood were associated with parental education, and whether the association was differentially influenced by race. Further, this study assessed racial differences in life course pathways from parental education to age-related decrements in kidney function, through current SES and health-related risk factors. METHOD: Data from the main survey and the Biomarker Project of the Midlife in the United States (MIDUS) Wave 2 and Refresher samples were combined, resulting in 1861 adults (54.5% female; age 25-84, Mage = 53.37) who self-identified as non-Hispanic Black (n = 326) and non-Hispanic white (n = 1535). Estimated glomerular filtration rate (eGFR) was based on serum creatinine, calculated using the CKD-EPI formula. Adults SES was based on education, income, and financial strains. Health-related risk factors included obesity, elevated blood pressure (BP), and insulin resistance. Hypotheses were tested by utilizing multiple linear regression and regression-based moderated mediation analysis. RESULTS: Lower parental education was associated with steeper age-related decrements in eGFR (B = 0.38, SE = 0.15, p = .013, 95%CI = 0.08, 0.68), due to higher eGFR among younger participants and lower eGFR among older participants. In addition, age-related decrements in kidney function were steeper among Black relative to white adults (B = 0.41, SE = 0.13, p < .01, 95%CI = 0.16, 0.66), driven by higher proportion of younger Black adults that met criterion for renal hyperfiltration. Furthermore, parental education and race were associated with age-related decrements in kidney function in an additive rather than interactive way. There were some racial differences in the life course pathways from parental education to age-related differences in eGFR, glucoregulation, and hypertension. Among Black adults, lower parental education was associated with elevated eGFR among younger participants through insulin resistance. Among white adults, lower parental education was linked to higher eGFR among younger adults and lower eGFR among older adults, and the association was mediated by current SES, elevated BP, and insulin resistance. DISCUSSION: Early life SES can have a long-lasting influence on the preclinical renal senescence that is associated with the normal biology of aging for both Black and white adults.
Authors: Carmen A Peralta; Eric Vittinghoff; Nisha Bansal; David Jacobs; Paul Muntner; Bryan Kestenbaum; Cora Lewis; David Siscovick; Holly Kramer; Michael Shlipak; Kirsten Bibbins-Domingo Journal: Am J Kidney Dis Date: 2013-03-07 Impact factor: 8.860
Authors: Toralf Melsom; Ulla Dorte Mathisen; Ole C Ingebretsen; Trond G Jenssen; Inger Njølstad; Marit D Solbu; Ingrid Toft; Bjørn O Eriksen Journal: Diabetes Care Date: 2011-05-18 Impact factor: 19.112