Reliability and relative validity of an FFQ for nutrients in the Tehran Lipid and Glucose Study
Reliability and relative validity of an FFQ for nutrients in the Tehran Lipid and Glucose Study
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DOI：
10.1017/s1368980009991698
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发表时间：
2010-05-01
影响因子：
3.2
通讯作者：
Azizi, Fereidoon
中科院分区：
文献类型：
--
作者：
Mirmiran, Parvin;Esfahani, Firoozeh Hosseini;Azizi, Fereidoon
目的：描述FFQ用于评估德黑兰血脂和葡萄糖研究（TLGS）参与者营养素摄入量的相对有效性和可靠性。设计：共有132名受试者（61名男性和71名女性）被纳入本研究。通过12次24小时饮食回忆（24 hDR）每月收集饮食数据。受试者完成了两个168项半定量FFQ。每个季节采集血液和尿液样本，测量血浆生物标志物和尿N和K。结果：参与者的平均年龄和BMI分别为35.5（SD 16.8）岁和25.5（SD 5.2）kg/m2。在35岁的人群中，24 hDR和FFQ 2之间总营养素摄入量的平均能量调整和数据衰减相关系数分别为0-44和0.37，男性个体营养素的范围为0.24 - 0.71（平均r=0.53），女性为0.11 - 0.60（平均r=0.39）。平均能量调整后的可靠性系数在35岁的人群中为0.48，男性为0.41 ~ 0.79（平均r=0.59），女性为0.39 ~ 0.74（平均r=0.60）。FFQ 2和24 hDR的准确一致率在男性中为39.6%至68.3%，在女性中为39.6%至54.1%。以问卷与生化指标的样本相关系数为下限，以三联法估计值为上限，问卷效度系数的范围分别为0.21-0.56（蛋白质）和0.37-0.61（K）。结论：TLGS编制的营养素摄入量问卷具有较好的相对效度和信度。
Objective: To describe the relative validity and reliability of the FFQ used for assessing nutrient intakes of participants in the Tehran Lipid and Glucose Study (TLGS).Design: A total of 132 subjects (sixty-one males and seventy-one females) were included in the study. Dietary data were collected monthly by means of twelve 24 h dietary recalls (24hDR). Subjects completed two, 168-item semi-quantitative FFQ. Blood and urine samples were taken every season for measurement of plasma biomarkers and urinary N and K.Results: Mean age and BMI of the participants were 35.5 (SD 16.8) years and 25.5 (SD 5.2) kg/m(2), respectively. The mean energy-adjusted and dattenuated correlation coefficients for overall nutrient intake between the 24hDR and FFQ2 were 0-44 and 0.37 in 35-year-olds, respectively, and for individual nutrients ranged from 0.24 to 0.71 in men (mean r=0.53) and from 0.11 to 0.60 in women (mean r=0.39). The mean energy-adjusted reliability coefficients varied from 0.48 in 35-year-olds, and ranged from 0.41 to 0.79 in men (mean r=0.59) and from 0.39 to 0.74 in women (mean r=0.60). The FFQ2 and 24hDR produced exact agreement rates ranging between 39.6% and 68.3% in men and between 39.6% and 54.1% in women. The ranges of questionnaire validity coefficients, with the sample correlation between the questionnaires and biochemical marker as the lower limit and the estimate obtained by the method of triads as the upper limit, were 0.21-0.56 (protein) and 0.37-0.61 (K).Conclusions: The FFQ developed for the TLGS has reasonable relative validity and reliability for nutrient intakes in Tehranian adults.