TF and nephrolithiasis: After adjustment, each 10% increase in transferrin saturation correlated with a 26% lower likelihood of kidney stones (odds ratio [OR] 0.74, 95% confidence interval [CI] 0.56-0.97, <i>p</i> = .04), while each 10 mg/day increase in dietary iron intake correlated with a 12% higher risk (OR 1.12, 95% CI 1.01-1.24, <i>p</i> = .036).