Faculté des Sciences Infirmières, Université Laval, Québec, QC G1V 0A6, Canada.
Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC G1V 4G5, Canada.
Nutrients. 2020 Dec 30;13(1):105. doi: 10.3390/nu13010105.
We assessed the reliability and validity of a Salty Food Frequency Questionnaire for Sodium (FFQ-Na) and a Discretionary Salt Questionnaire (DSQ) developed for the French-Canadian population. The reliability was evaluated according to temporal stability over a 7-15 day interval ( = 36). Validity was evaluated by testing the tools against a 24-h urine sodium excretion (24 h Uri-Na) and a 3-day food record, and this at individual and group levels ( = 164). The intra-class coefficients (ICC) values for the test-retest of the DSQ, the FFQ-Na and the two questionnaires combined were 0.73, 0.97 and 0.98 respectively. Correlations of the FFQ-Na with the 24 h Uri-Na and the 3-day food record were 0.3 ( < 0.001) and 0.35 ( < 0.001) respectively. The DSQ showed no significant correlation with the reference measures. The correlation between the two methods combined were 0.29 ( < 0.001) with the 24 h Uri-Na and 0.31 ( < 0.001) with the 3-day food record. The results of Bland-Altman indicated that for the combined questionnaires, there was a bias of measurement (underestimation of intake), but it was constant for every level of intake according to the reference measures. Finally, the cross-classification indicated an acceptable proportion of agreement, but a rate between 20% and 30% of classification in the opposite quartile. In conclusion, the developed tools are reliable and showed some facets of validity.
我们评估了为法裔加拿大人开发的咸食频率问卷（FFQ-Na）和随意盐问卷（DSQ）的可靠性和有效性。根据 7-15 天间隔的时间稳定性（n = 36）评估可靠性。通过测试工具与 24 小时尿钠排泄量（24 h Uri-Na）和 3 天食物记录的相关性来评估有效性，这是在个体和群体水平上进行的（n = 164）。DSQ、FFQ-Na 和两个问卷结合的重测内类系数（ICC）值分别为 0.73、0.97 和 0.98。FFQ-Na 与 24 h Uri-Na 和 3 天食物记录的相关性分别为 0.3（<0.001）和 0.35（<0.001）。DSQ 与参考指标无显著相关性。两种方法结合的相关性分别为 0.29（<0.001）与 24 h Uri-Na 和 0.31（<0.001）与 3 天食物记录。Bland-Altman 的结果表明，对于组合问卷，存在测量偏差（摄入低估），但根据参考指标，对于每个摄入水平，其都是恒定的。最后，交叉分类表明有一定比例的一致性，但在相反四分位数中，有 20%至 30%的分类率。总之，开发的工具具有可靠性，并表现出一些有效性方面。
