Abstract P039: No Beneficial Associations Between Dairy Products And Kidney Function After Myocardial Infarction
Introduction: Population-based studies showed beneficial associations between (low-fat) dairy products and kidney function. Kidney function declines with age, which is accelerated after myocardial infarction (MI). Little is known about dairy consumption and kidney function in MI patients. Hypothesis: Dairy intake may slow down kidney function decline after MI. Methods: We analysed 2,247 Dutch post-MI patients (60-80 years, 81% men) from the Alpha Omega Cohort. Dietary intakes, including types of dairy, were assessed at baseline (2002-2006) using a validated 203-item food frequency questionnaire. Glomerular filtration rate was estimated at baseline and after ~40 months, using the Chronic Kidney Disease (CKD) Epidemiology Collaboration equations for serum cystatin C alone (eGFR cysC , in ml/min per 1.73m 2 ). Associations between dairy intake and annual eGFR cysC change were obtained using multivariable linear regression models, adjusting for age, sex, lifestyle and dietary factors. Betas (β), with 95% confidence intervals (95% CI), represent additional eGFR cysC changes on top of annual decline, per increment in dairy intake. Results: At baseline, 22% was obese, 18% had diabetes and 15% had CKD (eGFR cysC <60). Median dairy intakes were 70 g/day for milk (62% consumed low-fat milk), 41 g/day for yogurt and 17 g/day for hard cheeses. The mean ± SD eGFR cysC at baseline was 82 ± 19, which on average declined by 3.42 ± 11.04, corresponding to an annual decline of 0.99 ± 3.21. Total milk consumption was not associated with annual eGFR cysC change in the multivariable model (β: 0.01 per 100 g/day, 95% CI: -0.08;0.10; Figure 1). Associations for hard cheeses (per 10 g/day) and yogurt (per 25 g/day) with eGFR cysC decline were also weak and non-significant. Sensitivity analyses in non-diabetic (n=1,843) or non-CKD patients (n=1,910) yielded similar results (Figure 1). Conclusions: Milk, hard cheeses and yogurt consumption were not associated with eGFR cysC decline in Dutch post-MI patients.