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Concurrent and construct validity of Mediterranean diet scores as assessed by an FFQ

机译：FFQ评估的地中海饮食评分的同时性和结构效度

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ObjectiveThe aim of the present study was to assess the concurrent and construct validity of two diet-quality indices, a modified Mediterranean diet score (mMDS) and a Mediterranean-like diet score (MLDS) additionally incorporating unhealthy food choices, as determined by an FFQ.DesignA validation study assessing FFQ intake estimates compared with ten or more unannounced 24 h recalls. Pearson's correlation coefficients, intraclass correlation coefficients (ICC), Blanda€“Altman plots and the limits of agreement method were used to assess the between-method agreement of scores. Construct validity was shown using associations between nutrient intakes derived from multiple 24 h recalls and the mMDS and MLDS derived from the FFQ.SettingGerona, Spain.SubjectsA total of 107 consecutively selected participants from a population-based cross-sectional survey.ResultsPearson's correlations for the energy-adjusted mMDS and MLDS compared with multiple recalls were 0?·48 and 0?·62, respectively. The average FFQ energy-adjusted mMDS and MLDS were 102 % and 98 % of the recall-based mMDS and MLDS estimates, respectively. The FFQ under- and overestimated dietary recall estimates of the energy-adjusted MLDS by 28 % and 25 %, respectively, with slightly wider boundaries for the mMDS (31 % and 34 %). The ICC, which assesses absolute agreement, was similar to Pearson's correlations (mMDS = 0?·48 and MLDS = 0?·61). The mean differences between methods were similar across the range of average ratings for both scores, indicating the absence of bias. The FFQ-derived mMDS and MLDS correlated in the anticipated directions with intakes of eleven (73?·3 %) and thirteen of fifteen nutrients (86?·7 %), respectively.ConclusionsThe FFQ provides valid estimates of diet quality as assessed by the mMDS and MLDS.
机译：目的本研究的目的是评估两个饮食质量指标的并发性和构建效度，即改良的地中海饮食评分（mMDS）和类似地中海饮食评分（MLDS），另外还包括由FFQ确定的不健康食物选择.DesignA验证研究评估FFQ摄入量估计值，并与十个或更多个未经通知的24小时召回进行比较。皮尔逊相关系数，类内相关系数（ICC），布兰达·奥特曼图和一致性极限方法被用来评估评分方法间的一致性。通过从多个24小时召回中获取的营养摄入量与从FFQ中获取的mMDS和MLDS之间的关联来显示构建体的有效性.Settings，Gerona，Spain.SubjectsSubjects从基于人群的横断面调查中总共选择了107位参与者，结果与多次召回相比，能量调整后的mMDS和MLDS分别为0？·48和0？·62。 FFQ能量调整后的平均mMDS和MLDS分别为基于召回的mMDS和MLDS估计值的102％和98％。 FFQ对能量调整后的MLDS的饮食召回估计分别低估和高估了28％和25％，而mMDS的界限稍宽一些（31％和34％）。评估绝对一致性的ICC与Pearson的相关性相似（mMDS = 0？·48和MLDS = 0？·61）。在两种评分的平均评分范围内，方法之间的平均差异相似，表明没有偏倚。 FFQ衍生的mMDS和MLDS在预期的方向上分别与摄入11种（73？·3％）和13种15种营养素（86？·7％）的摄入量相关。 mMDS和MLDS。

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