Reproducibility and validity of dietary patterns assessed with a food-frequency questionnaire.
Reproducibility and validity of dietary patterns assessed with a food-frequency questionnaire.
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DOI：
10.1093/ajcn/69.2.243
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发表时间：
1999-02
期刊：
影响因子：
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通讯作者：
F. Hu;E. Rimm;S. Smith-Warner;D. Feskanich;M. Stampfer;A. Ascherio;L. Sampson;W. Willett
中科院分区：
文献类型：
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作者：
F. Hu;E. Rimm;S. Smith-Warner;D. Feskanich;M. Stampfer;A. Ascherio;L. Sampson;W. Willett
背景最近，饮食模式的分析已经成为检查饮食-疾病关系的一种可能的方法。目的：我们使用食物频率问卷（FFQ）收集的膳食数据，检验因子分析定义的膳食模式的重复性和有效性。设计：我们从1986年的一项饮食验证研究中的健康专业人员随访研究中招募了一个男性子样本（n = 127）。一个131项FFQ管理两次，间隔1年，两个1周的饮食记录和血液样本收集在这1年的时间间隔。结果使用因子分析，我们确定了2个主要的饮食模式，这是定性相似的2个FFQ和饮食记录。第一个因素是谨慎的饮食模式，其特点是大量摄入蔬菜、水果、豆类、全谷物、鱼类和其他海鲜，而第二个因素是西方模式，其特点是大量摄入加工肉类、红肉、黄油、高脂肪乳制品、鸡蛋和精制谷物。两个FFQ之间的因子得分的可靠性相关系数分别为0.70的谨慎模式和0.67的西方模式。对于2种模式，2个FFQ和饮食记录之间的相关性（校正饮食记录的周间变化）范围为0.45至0.74。此外，因子分与营养素摄入量和血浆生物标志物浓度之间的相关性符合预期。结论：这些数据表明合理的重复性和有效性的主要饮食模式定义的因素分析与数据FFQ。
BACKGROUND 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 1-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.