title: Dietary intake in adults with type 1 and type 2 diabetes: validation of the Dietary Questionnaire for Epidemiological Studies version 2 FFQ against a 3-d weighed food record and 24-h urinalysis.
abstract: The Dietary Questionnaire for Epidemiological Studies version 2 (DQES v2) FFQ has not been validated in adults with diabetes. The aim was to determine the agreement between the DQES v2 FFQ and a 3-d weighed food record (WFR) and 24-h urinalysis in adults with type 1 and type 2 diabetes. The DQES v2 FFQ and a 3-d WFR were completed on one occasion for measurement of food and nutrient intake. A 24-h urine sample was provided for measurement of Na and K excretion. Participants were sixty-seven adults with type 1 and type 2 diabetes recruited from the community. Nutrient intake reported in the FFQ was within 20 % of the corresponding intake level reported in the WFR for the majority of nutrients. However, the 95 % limits of agreement showed large variation at an individual level between the two methods. There was a weak to moderate correlation between nutrient intake measured using the two methods and a moderate to high correlation for food intake. Quintile analysis showed that for the majority of foods and nutrients >60 % of participants were ranked within 1 quintile of the WFR ranking. The weighted κ values showed slight to moderate agreement between the two methods. Na intake was under-estimated in the FFQ by 25 % and K intake was over-estimated by 5 % compared with the 24-h urinalysis. In adults with type 1 and type 2 diabetes, it is appropriate to use the DQES v2 FFQ to measure food and nutrient intake at a group level.
authors.affiliation: School of Pharmacy and Medical Sciences,Sansom Institute for Health Research,University of South Australia,GPO Box 2471,Adelaide,SA 5000,Australia.
authors.forename: Kristina S
authors.initials: KS
authors.lastname: Petersen
authors.affiliation: School of Pharmacy and Medical Sciences,Sansom Institute for Health Research,University of South Australia,GPO Box 2471,Adelaide,SA 5000,Australia.
authors.forename: Jacqueline M
authors.initials: JM
authors.lastname: Smith
authors.affiliation: School of Pharmacy and Medical Sciences,Sansom Institute for Health Research,University of South Australia,GPO Box 2471,Adelaide,SA 5000,Australia.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Clifton
authors.affiliation: School of Pharmacy and Medical Sciences,Sansom Institute for Health Research,University of South Australia,GPO Box 2471,Adelaide,SA 5000,Australia.
authors.forename: Jennifer B
authors.initials: JB
authors.lastname: Keogh
mesh_terms: D000328:Adult; D000368:Aged; D003922:Diabetes Mellitus, Type 1 / Q000503:physiopathology* / Q000652:urine; D003924:Diabetes Mellitus, Type 2 / Q000503:physiopathology* / Q000652:urine; D004032:Diet; D015930:Diet Records; D002149:Energy Intake; D016021:Epidemiologic Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires; D016482:Urinalysis
keywords: DQES v2 Dietary Questionnaire for Epidemiological Studies version 2; Diabetes; Dietary intake; FFQ; Validation; WFR weighed food record; Weighed food records