Abstract
We aimed to assess the association between dairy product consumption and calcium intake with the prevalence and 10-year incidence of chronic kidney disease (CKD). 1185 participants aged ≥50 years at baseline were examined between 1992–4 and 2002–4. Dietary data were collected using a food frequency questionnaire, and servings of dairy food consumption were calculated. Baseline biochemistry including serum creatinine was measured. CKD was defined as Modification of Diet in Renal Disease Study estimated glomerular filtration rate <60 mL·min−1.1.73 m−2. Cross-sectional analysis showed that older adults in the highest quintile compared to the lowest quintile (reference group) of low/reduced fat dairy food consumption had reduced odds of CKD, multivariable-adjusted odds ratio, OR, 0.64 (95% confidence intervals, CI, 0.43–0.96). Increasing total intake of dietary calcium was associated with reduced odds of CKD (P-trend = 0.02); comparing highest versus lowest quintile: OR 0.62 (95% CI 0.42–0.92). Participants in the second versus first quintile of low/reduced fat dairy food consumption at baseline had 49% reduced risk of CKD 10 years later, OR 0.51 (95% CI 0.29–0.89). Higher consumption of low/reduced fat dairy foods was independently associated with lower risk of CKD. Additional population-based studies are warranted to confirm these findings.
Highlights
We aimed to assess the association between dairy product consumption and calcium intake with the prevalence and 10-year incidence of chronic kidney disease (CKD). 1185 participants aged ≥50 years at baseline were examined between 1992–4 and 2002–4
Given that systemic risk factors such as obesity, diabetes, and hypertension have been linked with chronic kidney disease (CKD)[9], there is a potential for regular dairy product consumption to modify renal function in older adults
This study showed that of the individual components of the Dietary Approaches to Stop Hypertension (DASH) diet score, low-fat dairy product intake was associated with reduced risk for kidney disease
Summary
We aimed to assess the association between dairy product consumption and calcium intake with the prevalence and 10-year incidence of chronic kidney disease (CKD). 1185 participants aged ≥50 years at baseline were examined between 1992–4 and 2002–4. Given that systemic risk factors such as obesity, diabetes, and hypertension have been linked with chronic kidney disease (CKD)[9], there is a potential for regular dairy product consumption to modify renal function in older adults. This study showed that of the individual components of the DASH diet score, low-fat dairy product intake was associated with reduced risk for kidney disease. In the current cohort study of older adults, we aimed to answer the following key questions: 1) Is regular consumption of dairy products (comprising of the three primary dairy foods consumed in our study population-milk, cheese, and yoghurt) and total calcium intake associated with the prevalence and 10-year incidence of CKD, independent of potential confounders such as age, sex, body mass, smoking, serum triglycerides, hypertension and diabetes? In the current cohort study of older adults, we aimed to answer the following key questions: 1) Is regular consumption of dairy products (comprising of the three primary dairy foods consumed in our study population-milk, cheese, and yoghurt) and total calcium intake associated with the prevalence and 10-year incidence of CKD, independent of potential confounders such as age, sex, body mass, smoking, serum triglycerides, hypertension and diabetes? and 2) Do any associations found differ by the type of dairy foods consumed i.e. regular/high fat compared to low/reduced fat dairy products?
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