We evaluated the performance of the IMMIDIET food frequency questionnaire (FFQ) used to collect dietary data for the Belgian case-control study on @entity150 . Thirty-seven @entity1 and @entity1 aged 50 years and older were recruited from the University Hospital in Leuven, Belgium. @entity1 completed the IMMIDIET FFQ, a 7-day diet diary and a 24-hour diet recall. Median intakes and inter-quartile ranges were calculated for 27 foods and nutrients from each dietary assessment method. All dietary factors were log-transformed and adjusted for energy using the nutrient density method. Pearson correlation coefficients were used to compare the different dietary assessment methods. Bland-Altman plots were also used to assess levels of agreement between the dietary methods. Energy, fruit and vegetable intake estimates were higher from the IMMIDIET FFQ compared with the two reference methods.The highest deattenuated correlations between the FFQ and 7-day diary were meat (0.58), bread (0.44), fruit (0.38) and fish (0.38). The highest deattenuated correlations between the FFQ and 24-hour recall were for fruit (0.72), fat (0.48), @entity167 (0.44), @entity165 (0.42), @entity8981 (0.42) and @entity5204 (0.41). Generally, correlation was lower for the micro-nutrients except for @entity3151 (0.42), @entity620 (0.41) and @entity460 (0.40). The IMMIDIET FFQ is an appropriate instrument to measure usual dietary intake for the Belgian case-control study on @entity150 risk. Further investigation of nutritional assessment methods is necessary.

Validation of the IMMIDIET food frequency questionnaire in an adult Belgian population: a report from the Belgian case-control study on XXXX risk.

@entity1 :: ('9606', 'Species') :: ['women', 'Participants', 'men'] @entity5204 :: ('CHEBI:26208', 'Chemical') :: ['polyunsaturated fatty acid'] @entity167 :: ('CHEBI:16236', 'Chemical') :: ['alcohol'] @entity620 :: ('MESH:D001205', 'Chemical') :: ['vitamin C'] @entity3151 :: ('MESH:D010758', 'Chemical') :: ['phosphorus'] @entity150 :: ('MESH:D001749', 'Disease') :: ['bladder cancer'] @entity460 :: ('MESH:D002118', 'Chemical') :: ['calcium'] @entity8981 :: ('CHEBI:25413', 'Chemical') :: ['monounsaturated fatty acid'] @entity165 :: ('MESH:D002784', 'Chemical') :: ['cholesterol']
@entity150 :: (MESH:D001749,Disease) :: ['bladder cancer']
