Triglycerides and Renal Outcomes According to Albuminuria and in Consideration of Other Metabolic Syndrome Components in Diabetic US Veterans.

INTRODUCTION: Hypertriglyceridemia, a component of the metabolic syndrome, is a known independent predictor of albuminuria and chronic kidney disease (CKD) in the general population. Previous studies have shown that the relationship of triglycerides (TGs) with outcomes changes across stages of CKD. Our objective was to examine the association of TG independent of other metabolic syndrome components with renal outcomes in diabetic patients with or without CKD. METHODS: This retrospective cohort study included diabetic US veteran patients with valid data on TGs, estimated glomerular filtration rate (eGFR), and albuminuria (urinary albumin/creatinine ratio) between fiscal years 2004 and 2006. Using Cox models adjusted for clinical characteristics and laboratory markers, we evaluated the relationship of TG with incident albuminuria (stratified by eGFR category) and based on eGFR (stratified by baseline albuminuria categories). To evaluate the relationship of TG with time to end-stage renal disease (ESRD), we stratified models by baseline CKD stage (eGFR category) and baseline albuminuria stage ascertained at time of TG measurement. RESULTS: In a cohort of 138,675 diabetic veterans, the mean ± SD age was 65 ± 11 years old and included 3% females and 14% African Americans. The cohort also included 28% of patients with non-dialysis-dependent CKD (eGFR <60 mL/min/1.73 m2), as well as 28% of patients with albuminuria (≥30 mg/g). The median (IQR) of serum TG was 148 (100, 222) mg/dL. We observed a slight positive linear association between TG and incident CKD after adjustment for Case-Mix and Laboratory variables among non-albuminuric and microalbuminuric patients. The relationship of high TG trended towards a higher risk of ESRD in CKD 3A non-albuminuric patients and in CKD 3A and 4/5 patients with microalbuminuria. CONCLUSION: In a large cohort, we have shown that elevated TGs are associated with all kidney outcomes tested independently of other metabolic syndrome components in diabetic patients with normal eGFR and normal albumin excretion rate, but the association is weaker in some groups of diabetic patients with preexisting renal complications.

Association of serum potassium with decline in residual kidney function in incident hemodialysis patients.

BACKGROUND: Hyperkalemia is associated with kidney function decline in patients with non-dialysis dependent chronic kidney disease, but this relationship is unclear for residual kidney function (RKF) among hemodialysis (HD) patients. METHODS: We conducted a retrospective cohort study of 6655 patients, who started HD January 2007 and December 2011 and who had data on renal urea clearance (KRU). Serum potassium levels were stratified into four groups (i.e. ≤4.0, >4.0 to ≤4.5, >4.5 to ≤5.0 and >5.0 mEq/L) and 1-year KRU slope for each group was estimated by a linear mixed-effects model. RESULTS: Higher serum potassium was associated with a greater decline in KRU, and the greatest decrease in KRU (-0.20, 95% confidence interval -0.50 to -0.06) was observed for baseline potassium >5.0 mEq/L in the fully adjusted model. Mediation analysis showed that KRU slope mediated 1.78% of the association between serum potassium and mortality. CONCLUSIONS: Hyperkalemia is associated with a decline in RKF amongst incident HD patients. These findings may have important clinical implications in the management of hyperkalemia in advanced CKD if confirmed in additional clinical trials.

Estimated Atherosclerotic Cardiovascular Disease Risk: Disparities and Severe COVID-19 Outcomes (from the National COVID Cohort Collaborative).

Although cardiovascular disease risk factors relate to COVID-19, the association of estimated atherosclerotic cardiovascular disease (ASCVD) risk with severe COVID-19 is not established. We examined the relation of the pooled-cohort ASCVD risk score to severe COVID-19 among 28,646 subjects from the National COVID Cohort Collaborative database who had positive SARS-CoV-2 test results from April 1, 2020 to April 1, 2021. In addition, 10-year ASCVD risk scores were calculated, and subjects were stratified into low-risk (<5%), borderline-risk (5% to <7.5%), intermediate-risk (7.5% to <20%), and high-risk (>=20%) groups. Severe COVID-19 outcomes (including death, remdesivir treatment, COVID-19 pneumonia, acute respiratory distress syndrome, and mechanical ventilation) occurring during follow-up were examined individually and as a composite in relation to ASCVD risk group across race and gender. Multiple logistic regression, adjusted for age, gender, and race, examined the relation of ASCVD risk group to the odds of severe COVID-19 outcomes. Our subjects had a mean age of 59.4 years; 14% were black and 57% were female. ASCVD risk group was directly related to severe COVID-19 prevalence. The adjusted odds ratio of the severe composite COVID-19 outcome by risk group (vs the low-risk group) was 1.8 (95% confidence interval 1.5 to 2.2) for the borderline-risk, 2.7 (2.3 to 3.2) for the intermediate-risk, and 4.6 (3.7 to 5.6) for the high-risk group. Black men and black women in the high-risk group showed higher severe COVID-19 prevalence compared with nonblack men and nonblack women. Prevalence of severe COVID-19 outcomes was similar in intermediate-risk black men and high-risk nonblack men (approximately 12%). In conclusion, although further research is needed, the 10-year ASCVD risk score in adults ages 40 to 79 years may be used to identify those who are at highest risk for COVID-19 complications and for whom more intensive treatment may be warranted.

Serum Low-Density Lipoprotein Cholesterol and Cardiovascular Disease Risk Across Chronic Kidney Disease Stages (Data from 1.9 Million United States Veterans).

In the general population, elevated low-density lipoprotein (LDL) cholesterol levels are an important risk factor for cardiovascular disease (CVD) and mortality; however, the association of LDL with mortality risk and cardiovascular events are less clear in chronic kidney disease (CKD). We sought to examine the relationship of LDL with mortality and rates of atherosclerotic cardiovascular disease (ASCVD) and non-atherosclerotic cardiovascular-related (non-ASCVD) hospitalizations across CKD stages. Our analytical cohort consisted of 1,972,851 United States veterans with serum LDL data between 2004 and 2006. Associations of LDL with all-cause and cardiovascular mortality across CKD stages were evaluated using Cox proportional hazard models with adjustment for demographics, comorbid conditions, smoking status, prescription of statins and non-statin lipid-lowering drugs, body mass index, albumin, high-density lipoprotein, and triglycerides. Associations between LDL and ASCVD and non-ASCVD hospitalizations were estimated using negative binomial regression models across CKD stages. The cohort consisted of 5% female, 14% Black, 29% diabetic, 33% statin-users, and 44% current smokers, with a mean patient age of 64 ± 14 years. Patients with high LDL (≥160 mg/dL) had a higher risk of all-cause and cardiovascular mortality as well as ASCVD and non-ASCVD hospitalization rates across all CKD stages compared with the reference (LDL 70 to <100 mg/dL). The associations with all-cause and cardiovascular mortality and ASCVD hospitalization rate were attenuated at higher CKD stages. These trends were reversed with amplification of the association of high LDL with non-ASCVD hospitalization at higher CKD stages. In conclusion, associations of LDL with mortality and both ASCVD and non-ASCVD hospitalizations are modified according to kidney disease stage.