Reproducibility and validity of dietary patterns assessed with a food-frequency questionnaire

摘要: Background: Recently, the analysis of dietary patterns has emerged as a possible approach to examining diet-disease relations. Objective: We examined reproducibility and validity defined by factor using data collected with food-frequency questionnaire (FFQ). Design: enrolled subsample men (n = 127) from Health Professionals Follow-up Study in diet-validation study 1986. A 131-item FFQ was administered twice, 1 y apart, two 1-wk diet records blood samples were during this 1-y interval. Results: Using analysis, we identified 2 major eating patterns, which qualitatively similar across FFQs records. The first factor, prudent pattern, characterized high intake vegetables, fruit, legumes, whole grains, fish other seafood, whereas second Western processed meat, red butter, high-fat dairy products, eggs, refined grains. reliability correlations for scores between 0.70 pattern 0.67 pattern. (corrected week-to-week variation records) ranged 0.45 0.74 patterns. In addition, nutrient intakes plasma concentrations biomarkers expected direction. Conclusions: These indicate reasonable an FFQ.