Astrid D Häberle1, Mary L Biggs2, Mary Cushman3, Bruce M Psaty4,5, Anne B Newman6, Michael G Shlipak7,8, John Gottdiener9, Chenkai Wu10,11, Julius M Gardin12, Nisha Bansal13, Michelle C Odden1. 1. Department of Epidemiology and Population Health, Stanford University, California. 2. Department of Biostatistics, University of Washington, Seattle. 3. Department of Medicine, Larner College of Medicine at the University of Vermont, Burlington. 4. Cardiovascular Health Research Unit, and Departments of Medicine, Epidemiology, and Health Services, University of Washington, Seattle. 5. Kaiser Permanente Washington Health Research Institute, Seattle. 6. Department of Epidemiology, University of Pittsburgh, Pennsylvania. 7. Departments of Medicine, Epidemiology and Biostatistics, University of California, San Francisco. 8. Kidney Health Research Collaborative, San Francisco VA Health Care System, California. 9. School of Medicine, University of Maryland, Baltimore. 10. Global Health Research Center, Duke Kunshan University, China. 11. Duke Global Health Institute, Duke University, Durham, North Carolina. 12. Department of Medicine, Rutgers New Jersey Medical School, Newark. 13. Kidney Research Institute, Division of Nephrology, University of Washington, Seattle.
Abstract
BACKGROUND: Many traditional cardiovascular risk factors do not predict survival to very old age. Studies have shown associations of estimated glomerular filtration rate (eGFR) and N-terminal pro-B-type natriuretic peptide (NT-pro-BNP) with cardiovascular disease and mortality in older populations. This study aimed to evaluate the associations of the level and change in eGFR and NT-pro-BNP with longevity to age 90 years. METHOD: The population included participants (n = 3,645) in the Cardiovascular Health Study, aged between 67 and 75 at baseline. The main exposures were eGFR, calculated with the Berlin Initiative Study (BIS) 2 equation, and NT-pro-BNP, and the main outcome was survival to age 90. Mixed models were used to estimate level and change of the main exposures. RESULTS: There was an association between baseline level and change of both eGFR and NT-pro-BNP and survival to 90, and this association persisted after adjustment for covariates. Each 10 mL/min/1.73 m2 higher eGFR level was associated with an adjusted odds ratio (OR) of 1.23 (95% CI: 1.13, 1.34) of survival to 90, and a 0.5 mL/min/1.73 m2 slower decline in eGFR was associated with an OR of 1.51 (95% CI: 1.31, 1.74). A twofold higher level of NT-pro-BNP level had an adjusted OR of 0.67 (95% CI: 0.61, 0.73), and a 1.05-fold increase per year in NT-pro-BNP had an OR of 0.53 (95% CI: 0.43, 0.65) for survival to age 90. CONCLUSION: eGFR and NT-pro-BNP appear to be important risk factors for longevity to age 90.
BACKGROUND: Many traditional cardiovascular risk factors do not predict survival to very old age. Studies have shown associations of estimated glomerular filtration rate (eGFR) and N-terminal pro-B-type natriuretic peptide (NT-pro-BNP) with cardiovascular disease and mortality in older populations. This study aimed to evaluate the associations of the level and change in eGFR and NT-pro-BNP with longevity to age 90 years. METHOD: The population included participants (n = 3,645) in the Cardiovascular Health Study, aged between 67 and 75 at baseline. The main exposures were eGFR, calculated with the Berlin Initiative Study (BIS) 2 equation, and NT-pro-BNP, and the main outcome was survival to age 90. Mixed models were used to estimate level and change of the main exposures. RESULTS: There was an association between baseline level and change of both eGFR and NT-pro-BNP and survival to 90, and this association persisted after adjustment for covariates. Each 10 mL/min/1.73 m2 higher eGFR level was associated with an adjusted odds ratio (OR) of 1.23 (95% CI: 1.13, 1.34) of survival to 90, and a 0.5 mL/min/1.73 m2 slower decline in eGFR was associated with an OR of 1.51 (95% CI: 1.31, 1.74). A twofold higher level of NT-pro-BNP level had an adjusted OR of 0.67 (95% CI: 0.61, 0.73), and a 1.05-fold increase per year in NT-pro-BNP had an OR of 0.53 (95% CI: 0.43, 0.65) for survival to age 90. CONCLUSION: eGFR and NT-pro-BNP appear to be important risk factors for longevity to age 90.
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