Impact of the revision of a nutrient database on the validity of a self-administered food frequency questionnaire (FFQ)
Impact of the revision of a nutrient database on the validity of a self-administered food frequency questionnaire (FFQ)
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DOI：
10.2188/jea.16.107
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发表时间：
2006-05-01
影响因子：
4.7
通讯作者：
Tsugane, Shoichiro
中科院分区：
文献类型：
--
作者：
Ishihara, Junko;Inoue, Manami;Tsugane, Shoichiro
背景：2000年国家营养数据库的修订对膳食评估中估计营养摄入量的绝对水平产生了强烈影响。然而，它是否通过估计摄入量影响个体的排名，这是表皮学研究中一个更重要的功能，尚未得到调查。在日本公共卫生中心前瞻性研究（JPHC研究）中，我们调查了营养数据库的修订对食物频率问卷（FFQ）有效性的影响，该问卷用于估计营养摄入量。方法：受试者是JPHC研究的一个子样本，他们自愿参加FFQ的验证研究。以28天体重饮食记录为金标准，评价FFQ的有效性。根据FFQ重新计算营养摄入量，使用修订后的数据库，并将结果与使用先前数据库的结果进行比较。使用修订后的数据库计算FFO估算的摄入量与饮食记录之间的Spearman等级相关系数（CCs），并与使用先前数据库计算的CCs进行比较。结果：使用修订后的数据库，大多数营养素的平均摄入量显著增加或减少。然而，当使用修订后的数据库进行计算时，根据饮食记录估计的摄入量和FFQ之间的CC没有明显变化。CCs点估计值的差异范围从-0.14到0.15。同样，在两个数据库中，生物标志物和根据FFQ估计的摄入量之间的cc相似。结论：尽管许多营养素的摄入量水平发生了变化，但我们使用营养摄入量等级相关的FFO的有效性并未受到日本营养数据库修订的影响。
BACKGROUND: Revision of the national nutrient database in 2000 had a strong impact on the absolute level of estimated nutrient intake in dietary assessments. However, whether it influenced the ranking of individuals by estimated intake, a more important function in epiderniologic studies, has not been investigated. Here, we investigated the effect of this revision of the nutrient database on the validity of a food frequency questionnaire (FFQ) used to estimate nutrient intake in the Japan Public Health Center-based prospective Study (JPHC Study).METHODS: Subjects were a subsample of the JPHC Study who volunteered to participate in the validation study of the FFQ. Validity of the FFQ was evaluated by reference to the 28-day weighed dietary records as a gold standard. Nutrient intake according to the FFQ was recalculated using the revised database, and the results were compared to those using the previous database. Spearman's rank correlation coefficients (CCs) between intakes estimated by the FFO and dietary records were computed using the revised database, and were compared to CCs computed using the previous database.RESULTS: For most of the nutrients, mean intake increased or decreased significantly using the revised database. However, no notable change was seen for the CC between estimated intake according to dietary records and FFQ when the revised database was used for calculation. Differences in the point estimates of the CCs ranged from -0.14 to 0.15. Likewise, CCs between biomarkers and estimated intake according to FFQ were similar for the two databases.CONCLUSION: Despite changes in intake levels for many nutrients, the validity of our FFO using rank correlation by nutrient intake was not influenced by revision of the nutrient database in Japan.