title: Associations between dairy food consumption and chronic kidney disease in older adults.
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.
authors.affiliation: Centre for Vision Research, The Westmead Institute for Medical Research, University of Sydney, NSW, Australia.
authors.forename: Bamini
authors.initials: B
authors.lastname: Gopinath
authors.affiliation: Centre for Transplantation and Renal Research, The Westmead Institute for Medical Research, University of Sydney, NSW, Australia.
authors.forename: David C
authors.initials: DC
authors.lastname: Harris
authors.affiliation: Faculty of Health Sciences, University of Sydney and St Vincent's Hospital, Australia.
authors.forename: Victoria M
authors.initials: VM
authors.lastname: Flood
authors.affiliation: Centre for Vision Research, The Westmead Institute for Medical Research, University of Sydney, NSW, Australia.
authors.forename: George
authors.initials: G
authors.lastname: Burlutsky
authors.affiliation: Centre for Vision Research, The Westmead Institute for Medical Research, University of Sydney, NSW, Australia.
authors.forename: Paul
authors.initials: P
authors.lastname: Mitchell
mesh_terms: D000368:Aged; D000375:Aging; D003430:Cross-Sectional Studies; D003611:Dairy Products; D004032:Diet; D015930:Diet Records; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D016017:Odds Ratio; D051436:Renal Insufficiency, Chronic / Q000453:epidemiology*; D011795:Surveys and Questionnaires