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

Public Health Nutrition

Alejandra A Benítez-Arciniega¹  Maria-Isabel Covas¹  Michelle A Mendez¹  Maria-Asunción Rovira Martori¹  Jaume Marrugat¹  Hector Sanz¹  Jose M Baena-Díez¹  Cristina Soler¹  Helmut Schröder¹  Alba Llopis¹ 

关键词: Validation;    Diet quality;    Mediterranean diet scores;    Construct validity;   

DOI  :  10.1017/S1368980011001212

学科分类：卫生学

来源: Cambridge University Press

【 摘 要 】

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), Bland–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.

【 授权许可】

Unknown