BACKGROUND: Chronic kidney disease is common with older age and is characterized on renal biopsy by global glomerulosclerosis, tubular atrophy, interstitial fibrosis, and arteriosclerosis. OBJECTIVE: To see whether the prevalence of these histologic abnormalities in the kidney increases with age in healthy adults and whether histologic findings are explained by age-related differences in kidney function or chronic kidney disease risk factors. DESIGN: Cross-sectional study. SETTING: Mayo Clinic, Rochester, Minnesota, from 1999 to 2009. PATIENTS: 1203 adult living kidney donors. MEASUREMENTS: Core-needle biopsy of the renal cortex obtained during surgical implantation of the kidney, and medical record data of kidney function and risk factors obtained before donation. RESULTS: The prevalence of nephrosclerosis (> or =2 chronic histologic abnormalities) was 2.7% (95% CI, 1.1% to 6.7%) for patients aged 18 to 29 years, 16% (CI, 12% to 20%) for patients aged 30 to 39 years, 28% (CI, 24% to 32%) for patients aged 40 to 49 years, 44% (CI, 38% to 50%) for patients aged 50 to 59 years, 58% (CI, 47% to 67%) for patients aged 60 to 69 years, and 73% (CI, 43% to 90%) for patients aged 70 to 77 years. Adjustment for kidney function and risk factor covariates did not explain the age-related increase in the prevalence of nephrosclerosis. LIMITATION: Kidney donors are selected for health and lack the spectrum or severity of renal pathologic findings in the general population. CONCLUSION: Kidney function and chronic kidney disease risk factors do not explain the strong association between age and nephrosclerosis in healthy adults. PRIMARY FUNDING SOURCE: National Institutes of Health, U.S. Public Health Service.
BACKGROUND:Chronic kidney disease is common with older age and is characterized on renal biopsy by global glomerulosclerosis, tubular atrophy, interstitial fibrosis, and arteriosclerosis. OBJECTIVE: To see whether the prevalence of these histologic abnormalities in the kidney increases with age in healthy adults and whether histologic findings are explained by age-related differences in kidney function or chronic kidney disease risk factors. DESIGN: Cross-sectional study. SETTING:Mayo Clinic, Rochester, Minnesota, from 1999 to 2009. PATIENTS: 1203 adult living kidney donors. MEASUREMENTS: Core-needle biopsy of the renal cortex obtained during surgical implantation of the kidney, and medical record data of kidney function and risk factors obtained before donation. RESULTS: The prevalence of nephrosclerosis (> or =2 chronic histologic abnormalities) was 2.7% (95% CI, 1.1% to 6.7%) for patients aged 18 to 29 years, 16% (CI, 12% to 20%) for patients aged 30 to 39 years, 28% (CI, 24% to 32%) for patients aged 40 to 49 years, 44% (CI, 38% to 50%) for patients aged 50 to 59 years, 58% (CI, 47% to 67%) for patients aged 60 to 69 years, and 73% (CI, 43% to 90%) for patients aged 70 to 77 years. Adjustment for kidney function and risk factor covariates did not explain the age-related increase in the prevalence of nephrosclerosis. LIMITATION: Kidney donors are selected for health and lack the spectrum or severity of renal pathologic findings in the general population. CONCLUSION: Kidney function and chronic kidney disease risk factors do not explain the strong association between age and nephrosclerosis in healthy adults. PRIMARY FUNDING SOURCE: National Institutes of Health, U.S. Public Health Service.
Authors: Josef Coresh; Elizabeth Selvin; Lesley A Stevens; Jane Manzi; John W Kusek; Paul Eggers; Frederick Van Lente; Andrew S Levey Journal: JAMA Date: 2007-11-07 Impact factor: 56.272
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