Biostatistics, Faculty of Medicine, Department of Public Health, University of Barcelona, Casanova Street 143, 08036 Barcelona, Spain.
Public Health Nutr. 2011 Dec;14(12A):2338-45. doi: 10.1017/S1368980011002606.
To compare and evaluate the reliability of several indexes of adherence to the Mediterranean diet.
The ten indexes included in the analysis were: Mediterranean Diet Score (MDS), Mediterranean Score (MS), Dietary Score (DS), Mediterranean-Dietary Quality Index (Med-DQI), Mediterranean Dietary Pattern adherence index (MDP), Mediterranean Adequacy Index (MAI), Mediterranean Style Dietary Pattern Score (MSDPS), Mediterranean food pattern PREDIMED Study (MeDiet-PREDIMED), relative Mediterranean diet (rMED) and Cardioprotective Mediterranean diet index. Factor analysis using the correlations between indexes was applied. The correlation with factors and the reliability coefficient were calculated.
A total of 324 healthy undergraduates at the University of Barcelona, Spain, were surveyed.
The highest correlations were observed between MDP adherence index and MAI (0·82); MAI and MSDPS (0·80); and MDS and rMED (0·77). Factor analysis showed a hidden common factor that explained over 70 % of the variability (71·03 %). This factor is understood as 'adherence to the Mediterranean diet'. The indexes that showed the highest correlation with this factor were Med-DQI (0·85), MDS (0·84), rMED (0·80) and MAI (0·80). These indexes showed acceptable performance in measuring the adherence to the Mediterranean diet. The components that correlated strongly with this factor were monounsaturated-to-saturated fatty acid ratio (MS ratio), fruit and vegetables. Furthermore, a second common factor was found explaining 18 % of the variability. This second factor is highly positive related to dairy products and lean meat, and negative related to MS ratio.
The indexes showed satisfactory performance in assessing adherence to the Mediterranean diet. However, in order to improve the reliability and concordance between the indexes, further studies are required to select the components, the number of components, and the scoring criteria of the indexes to improve their internal consistency.
比较和评价几种地中海饮食依从性指标的可靠性。
分析中包括的 10 个指标为：地中海饮食评分（MDS）、地中海评分（MS）、膳食评分（DS）、地中海-膳食质量指数（Med-DQI）、地中海饮食依从性指数（MDP）、地中海充足指数（MAI）、地中海饮食模式得分（MSDPS）、地中海饮食预防研究（MeDiet-PREDIMED）、相对地中海饮食（rMED）和心脏保护地中海饮食指数。采用指标间相关性的因子分析。计算与因子的相关性和可靠性系数。
对西班牙巴塞罗那大学的 324 名健康本科生进行了调查。
MDP 依从性指数与 MAI（0.82）、MAI 与 MSDPS（0.80）、MDS 与 rMED（0.77）相关性最高。因子分析显示，隐藏的共同因子可解释超过 70%的变异性（71.03%）。该因子被理解为“对地中海饮食的依从性”。与该因子相关性最高的指标为 Med-DQI（0.85）、MDS（0.84）、rMED（0.80）和 MAI（0.80）。这些指标在测量地中海饮食依从性方面表现出良好的性能。与该因子相关性较强的成分有单不饱和脂肪酸与饱和脂肪酸的比值（MS 比值）、水果和蔬菜。此外，还发现了第二个共同因子，解释了 18%的变异性。这个第二个因子与乳制品和瘦肉呈高度正相关，与 MS 比值呈负相关。
这些指标在评估地中海饮食依从性方面表现出良好的性能。然而，为了提高指标的可靠性和一致性，需要进一步研究来选择指标的组成部分、组成部分的数量和评分标准，以提高其内部一致性。
