Faculty of Medicine of the University of Porto, Al. Prof. Hernâni Monteiro, 4200-319Porto, Portugal.
Faculty of Psychology and Education Sciences of the University of Porto, Rua Alfredo Allen, 4200-135Porto, Portugal.
Br J Nutr. 2021 Dec 14;126(11):1737-1748. doi: 10.1017/S0007114521000532. Epub 2021 Feb 15.
The Mediterranean Diet Quality Index (KIDMED Index) is frequently used to evaluate adherence to the Mediterranean Dietary Pattern among children and adolescents, through sixteen questions with the associated total score ranging from -4 to 12. However, in the authors' best knowledge, the psychometric properties of this index had not yet been investigated in Portugal. Thus, the main purpose of the present study was to investigate the reproducibility and the validity of the KIDMED Index in a sample of 185 Portuguese adolescents. The reproducibility was tested by comparing the application of the KIDMED Index at two different times (2-week interval), using McNemar test and Kappa statistics. There was moderate agreement (κw = 0·591; 95 % CI 0·485, 0·696) and no significant change (P-value = 0·201) in the KIDMED Index classification, between the two applications. The validity was explored by comparing the results obtained by the KIDMED Index and by the average of 3-d Dietary-Record (DR), using Spearman's correlation coefficient and Kappa statistics. There was weak correlation (ρ = 0·317; P-value < 0·001) and slight agreement (κw = 0·167; 95 % CI 0·071, 0·262) between the KIDMED Index classification and the 3-d DR-derived KIDMED score, and moderate correlation (ρ = 0·423; P-value < 0·001) and fair agreement (κw = 0·344; 95 % CI 0·202, 0·486) between the terciles of the KIDMED Index and the Mediterranean Adequacy Index scores. The results suggested an acceptable reproducibility and validity of the Portuguese version of the KIDMED Index, in alignment with the few studies investigating psychometric properties of this index in other countries.
地中海饮食质量指数（KIDMED 指数）常用于评估儿童和青少年对地中海饮食模式的依从性，通过 16 个问题进行评估，总分为-4 至 12 分。然而，据作者所知，该指数的心理测量特性尚未在葡萄牙进行过研究。因此，本研究的主要目的是在 185 名葡萄牙青少年样本中调查 KIDMED 指数的再现性和有效性。通过比较 KIDMED 指数在两个不同时间（2 周间隔）的应用，使用 McNemar 检验和 Kappa 统计来检验再现性。在 KIDMED 指数分类中，两次应用之间存在中度一致性（κw=0.591；95%CI 0.485，0.696），且无显著差异（P 值=0.201）。通过比较 KIDMED 指数和 3 天饮食记录（DR）的平均值获得的结果，使用 Spearman 相关系数和 Kappa 统计来探索有效性。KIDMED 指数分类与 3 天 DR 衍生的 KIDMED 评分之间存在弱相关（ρ=0.317；P 值<0.001）和轻微一致性（κw=0.167；95%CI 0.071，0.262），KIDMED 指数的三分位数与地中海适宜性指数评分之间存在中度相关（ρ=0.423；P 值<0.001）和良好一致性（κw=0.344；95%CI 0.202，0.486）。结果表明，葡萄牙语版 KIDMED 指数具有可接受的再现性和有效性，与其他国家研究该指数心理测量特性的少数研究结果一致。
