Witte J S, Haile R W
Department of Preventive Medicine, University of Southern California School of Medicine, Los Angeles 90033, USA.
J Stud Alcohol. 1996 Jul;57(4):406-9. doi: 10.15288/jsa.1996.57.406.
We evaluated the agreement in reported alcohol consumption between a standard food frequency questionnaire (FFQ) and a risk factor questionnaire (RFQ) developed for a genetic epidemiologic study of breast cancer.
The FFQ measured intake of alcoholic beverages by asking which of nine levels were consumed during a single time period. In contrast, the RFQ used open-ended questions to measure intake of alcoholic beverages during numerous time periods. Subjects (N = 765) completed both questionnaires at home.
Mean daily alcohol consumption levels were consistently higher in the FFQ than in the RFQ; for example, the mean alcohol consumption for all subjects was 7.0 g/day in the FFQ versus 5.3 g/day in the RFQ. Moreover, the RFQ overestimated the number of nondrinkers relative to the FFQ. Nonetheless, the Spearman correlation coefficients between daily alcohol consumption levels as measured by the two questionnaires were relatively high: total alcohol, r = 0.72; beer, r = 0.69; wine, r = 0.69; and distilled spirits, r = 0.54.
The reasonable agreement between these questionnaires supports the validity of historical alcohol consumption levels measured by the RFQ.
我们评估了一份标准食物频率问卷（FFQ）与一份为乳腺癌遗传流行病学研究开发的风险因素问卷（RFQ）在报告饮酒量方面的一致性。
FFQ通过询问在单个时间段内饮用了九个等级中的哪一个来测量酒精饮料的摄入量。相比之下，RFQ使用开放式问题来测量在多个时间段内酒精饮料的摄入量。受试者（N = 765）在家中完成了两份问卷。
FFQ中每日平均饮酒量始终高于RFQ；例如，所有受试者在FFQ中的平均酒精摄入量为7.0克/天，而在RFQ中为5.3克/天。此外，相对于FFQ，RFQ高估了不饮酒者的数量。尽管如此，两份问卷测量的每日酒精摄入量水平之间的斯皮尔曼相关系数相对较高：总酒精量，r = 0.72；啤酒，r = 0.69；葡萄酒，r = 0.69；蒸馏酒，r = 0.54。
这些问卷之间合理的一致性支持了RFQ测量的既往饮酒量水平的有效性。
