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Renin-Independent Aldosteronism Heightened the Risk of Renal Impairment in Chinese Adults From Hakka Biobank
Jingwei Lin1,2, Fuxiang Fang1,2, Shengzhu Huang2
1Department of Urology, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, China.
Rationale & Objective:
The differential impact of renin-independent aldosteronism versus renin-dependent aldosteronism on kidney function-particularly urinary albumin-creatinine ratio (UACR), estimated glomerular filtration rate (eGFR), and their combination-remains unclear in the Chinese Hakka population. This study aimed to compare their associations with renal impairment.
Study Design:
Cross-sectional analysis.
Setting & Participants:
A total of 7,760 adults from the Hakka Biobank in Bobai County, Guangxi, China.
Exposures:
Aldosteronism phenotypes (renin-independent aldosteronism, renin-dependent aldosteronism, and control) defined by plasma aldosterone concentration and plasma renin concentration.
Outcomes:
Chronic kidney disease (CKD)-UACR (UACR ≥ 3 mg/mmol), CKD-eGFR (eGFR < 60 mL/min/ 1.73 m2), and CKD-combination (defined as participants classified as having moderate, high, or very high CKD risk according to 2024 KDIGO [Kidney Disease: Improving Global Outcomes]) guidelines.
Analytical Approach:
Multivariable logistic and linear regression, restricted cubic splines, and stratified analysis.
Results:
Renin-independent aldosteronism was associated with higher CKD-combination risk than renin-dependent aldosteronism (OR, 1.21; 95% CI, 1.02-1.45; P = 0.03). Elevated plasma aldosterone concentration (but not plasma renin concentration or aldosterone-to-renin ratio) was consistently associated with all CKD outcomes in both groups (OR range, 1.49-13.77; P < 0.05). A linear dose-response relationship was observed in renin-independent aldosteronism, whereas renin-dependent aldosteronism showed both linear and nonlinear trends. Aldosterone interacted with hyperuricemia and hypertension in renin-independent aldosteronism and with dyslipidemia in renin-dependent aldosteronism.
Limitations:
Cross-sectional design precludes causal inference; findings are specific to the Hakka population.
Conclusions:
Renin-independent aldosteronism confers a higher risk of renal impairment than renin-dependent aldosteronism in the Chinese Hakka population, highlighting the need for early screening and targeted intervention in renin-independent aldosteronism.
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