Race-specific validation of food intake obtained from a comprehensive FFQ: the Adventist Health Study-2
Race-specific validation of food intake obtained from a comprehensive FFQ: the Adventist Health Study-2
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DOI：
10.1017/s1368980011000735
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发表时间：
2011-11-01
影响因子：
3.2
通讯作者：
Fraser, Gary E.
中科院分区：
文献类型：
--
作者：
Jaceldo-Siegl, Karen;Fan, Jing;Fraser, Gary E.
目的：评估使用FFQ测量食物和食物组摄入量的种族特异性有效性。设计：校正研究参与者按教会和教会内受试者随机从复临健康研究-2 （AHS-2）队列中选择。使用FFQ评估了47种食物和食物组的摄入量，然后与使用6次24小时饮食回顾（24HDR）测量的摄入量估计值进行了比较。我们使用了两种方法来评估问卷的有效性：(i)四分位数交叉分类和（ii）去衰减相关系数。背景：基督复临安息日会的成员分布在美国和加拿大。受试者：AHS-2校准研究的成员（550名白人和461名黑人）。结果：在FFQ和24HDR上完全一致的参与者比例在白人中平均为46%（范围：29-87%），在黑人中平均为44%（范围：25-88%）。四分位数总错误分类的比例在白人中为1%至11%，在黑人中为1%至15%。去衰减效度相关性在白人中平均为0.59，在黑人中为0.48。在这47种食物和食物组中，43种白人和33种黑人的有效性相关系数为0.4。结论：AHS-2问卷对两种人种的大部分食品均具有较好的效度；然而，白人的效度相关性往往高于黑人。
Objective: To assess race-specific validity of food and food group intakes measured using an FFQ.Design: Calibration study participants were randomly selected from the Adventist Health Study-2 (AHS-2) cohort by church, and then by subject-within-church. Intakes of forty-seven foods and food groups were assessed using an FFQ and then compared with intake estimates measured using six 24 h dietary recalls (24HDR). We used two approaches to assess the validity of the questionnaire: (i) cross-classification by quartile and (ii) de-attenuated correlation coefficients.Setting: Seventh-day Adventist church members geographically spread throughout the USA and Canada.Subjects: Members of the AHS-2 calibration study (550 whites and 461 blacks).Results: The proportion of participants with exact quartile agreement in the FFQ and 24HDR averaged 46% (range: 29-87%) in whites and 44% (range: 25-88%) in blacks. The proportion of quartile gross misclassification ranged from 1% to 11% in whites and from 1 % to 15 % in blacks. De-attenuated validity correlations averaged 0.59 in whites and 0.48 in blacks. Of the forty-seven foods and food groups, fortythree in whites and thirty-three in blacks had validity correlations >0.4.Conclusions: The AHS-2 questionnaire has good validity for most foods in both races; however, validity correlations tend to be higher in whites than in blacks.