Hu, Frank B.Rimm, Eric Bruce::0ab2926c8242f35e5a982e3cf59f4987::600Smith-Warner, Stephanie A.Feskanich, DianeStampfer, MeirAscherio, AlbertSampson, LauraWillett, Walter2019-08-261999Khani, Bahram Rashid, Weimin Ye, Paul Terry, and Alicja Wolk. 2004. “Reproducibility and Validity of Major Dietary Patterns among Swedish Women Assessed with a Food-Frequency Questionnaire.” The Journal of Nutrition 134 (6): 1541–45. https://doi.org/10.1093/jn/134.6.1541.0002-91651938-3207http://nrs.harvard.edu/urn-3:HUL.InstRepos:41249201Background: Recently, the analysis of dietary patterns has emerged as a possible approach to examining diet-disease relations. Objective: We examined the reproducibility and validity of dietary patterns defined by factor analysis using dietary data collected with a food-frequency questionnaire (FFQ). Design: We enrolled a subsample of men (n = 127) from the Health Professionals Follow-up Study in a diet-validation study in 1986. A 131-item FFQ was administered twice, 1 y apart, and two l-wk diet records and blood samples were collected during this 1-y interval. Results: Using factor analysis, we identified 2 major eating patterns, which were qualitatively similar across the 2 FFQs and the diet records, The first factor, the prudent dietary pattern, was characterized by a high intake of vegetables, fruit, legumes, whole grains, and fish and other seafood, whereas the second factor, the Western pattern, was characterized by a high intake of processed meat, red meat, butter, high-fat dairy products, eggs, and refined grains. The reliability correlations for the factor scores between the 2 FFQs were 0.70 for the prudent pattern and 0.67 for the Western pattern. The correlations (corrected for week-to-week variation in diet records) between the 2 FFQs and diet records ranged from 0.45 to 0.74 for the 2 patterns. In addition, the correlations between the factor scores and nutrient intakes and plasma concentrations of biomarkers were in the expected direction. Conclusions: These data indicate reasonable reproducibility and validity of the major dietary patterns defined by factor analysis with data from an FFQ.en-USJournal Article2019-08-2610.1093/jn/134.6.1541