Reproducibility of an Italian food frequency questionnaire for cancer studies: Results for specific nutrients
Reproducibility of an Italian food frequency questionnaire for cancer studies: Results for specific nutrients
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DOI：
10.1016/1047-2797(95)92893-d
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发表时间：
1995-01-01
影响因子：
5.6
通讯作者：
La Vecchia, Carlo
中科院分区：
文献类型：
--
作者：
Franceschi, Silvia;Barbone, Fabio;La Vecchia, Carlo
对乳腺癌、卵巢癌和消化道癌病例对照研究中使用的定量食物频率问卷（FFQ）中的总能量和27种选定营养素摄入量的测量结果进行了重复性评价。对来自意大利三个省（波尔德诺内、热那亚和福尔利）的452名志愿者（144名男性和308名女性;中位年龄= 50岁）进行了两次FFQ给药，间隔3至10个月（中位时间= 5.4个月）。粗营养素摄入量（未调整能量）之间的皮尔逊相关系数（r）范围从0.50（植物脂肪）到0.80（酒精），大多数值在0.60和0.70之间（中位数r = 0.67）。调整总能量的营养摄入量略有下降的系数（中位数r = 0.60）。两种测量之间的一致性在性别、年龄、教育程度和访谈间隔方面没有实质性差异。具体FFQ成分的贡献（i.例如，仅频率问题、开放性问题、份量大小和脂肪摄入模式）的营养测量的性能和再现性也分别进行了评估，通常得到非常相似的结果。然而，关于个人脂肪摄入模式的七个问题，用于调节各种食谱的组成，导致植物脂肪、油酸和维生素E的平均每日摄入量显著增加，但亚油酸和多不饱和脂肪酸的估计每日摄入量减少。本研究表明，该FFQ的重现性非常好。在像意大利这样的国家，不同地区和人群存在不同的饮食模式，特别是在使用脂肪调味方面，值得询问有关个人脂肪摄入模式的具体问题，以澄清不同类型的脂肪和维生素E在乳腺癌、卵巢癌和消化道癌病因中的作用。
The reproducibility of measures of the intake of total energy and 27 selected nutrients from a quantitative food frequency questionnaire (FFQ) used in a case-control study on cancer of the breast, ovary, and digestive tract was evaluated. The results of two FFQ administrations at an interval of 3 to 10 months (median = 5.4 months) to 452 volunteers (144 males and 308 females; median age = 50 years) from three Italian provinces (Pordenone, Genoa, and Forli) were compared. Pearson correlation coefficients (r) between crude nutrient intake (unadjusted for energy) ranged from 0.50 for vegetable fat to 0.80 for alcohol, with most values falling between 0.60 and 0.70 (median r = 0.67). Adjustment of nutrient intakes for total energy slightly decreased most coefficients (median r = 0.60). The agreement between the two measurements did not differ substantially by sex, age, education, and interval between interviews. The contribution of specific FFQ components (i. e., frequency-only questions, open questions, portion size, and fat intake pattern) was also assessed separately with respect to the performance and reproducibility of nutrient measures, yielding, in general, very similar results. The seven questions concerning individual fat intake pattern, which were used to modulate the composition of various recipes, led, however, to a significant increase in mean daily intake of vegetable fat, oleic acid, and vitamin E, but a reduction of estimated daily intake of linoleic acid and polyunsaturated fatty acids. The present study showed that the reproducibility of this FFQ is very good. In a country like Italy where distinctive dietary patterns exist in different regions and groups of the population, especially with respect to the use of fat for seasoning, specific questions on individual fat intake pattern are worth asking in order to clarify the role of different types of fat and vitamin E in the etiology of cancer of the breast, ovary, and digestive tract.