Remnant cholesterol (RC), a key indicator of dyslipidemia, has been validated as a contributing factor to metabolic and cardiovascular diseases, both of which are closely associated with kidney stones (KS). This study aimed to investigate the association between RC and the risk of KS in Chinese adults. A total of 8,576 KS cases (mean age 55.87, 69.37% male) and 137,523 controls (mean age 54.57, 51.62% male) were included in this case-control study. RC was calculated using the formula: RC = TC-HDL-LDL. KS was ascertained with ultrasound by well-trained physicians. Multivariable logistic and restricted cubic spline (RCS) were applied to investigate the relationship between RC and KS. A total of 146,099 subjects (weighted mean age 54.64 years and 52.66% male) were included with mean RC = 0.8 for controls and RC = 0.72 for KS cases (P < 0.001). The multivariable-adjusted OR for KS occurrence across consecutive quartiles was 1.00 (reference), 1.05 (0.98-1.12), 1.15 (1.07-1.22), and 1.44 (1.35-1.53), respectively. Moreover, each standard deviation increment of RC was associated with a 15% (OR:1.15, 95% CI: 1.12-1.19) higher risk of KS occurrence. RCS showed significant and linear dose-response relationships between RC and KS occurrence (P-overall < 0.001, P-nonlinear = 0.270). The positive associations between RC and KS risk persisted in sensitivity analyses, suggesting the robustness of the results. In this case-control study of Chinese adults, elevated RC was associated with the occurrence of KS.

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http://dx.doi.org/10.1007/s00240-024-01651-7DOI Listing

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