Marshall J, Priore R, Haughey B, Rzepka T, Graham S
Am J Epidemiol. 1980 Nov;112(5):675-83. doi: 10.1093/oxfordjournals.aje.a113040.
Recently published data suggest relationships between ingestion of a number of food items and risk of cancer of the stomach, bowel and mouth. This engenders concern over the accuracy of such data. To study this, dietary interviews of 158 males in the Western New York Study of Cancer Epidemiology are compared to their spouses' estimates of the husband's dietary histories as taken in separate interviews. Respondents were asked to estimate the frequency with which the males consumed each of several foods. For analysis, the frequency estimates were assembled into categories similar to those used in recent epidemiologic analysis: 5-7 times per week, 1-4 times per week, 1-3 times per month and less than once per month. Generally, 60-80% of respondents pairs agree exactly on the frequency of consumption for individual food items. Over 90% of spouse and respondent food frequency estimates are within one frequency category of each other. Radical disagreements between spouses are rare; generally, in less than 2% of spouse pairs does one member estimate the maximum frequency category, and the other minimum frequency category. The authors suggest therefore that, although diet histories are not precisely replicable, they must be adequate to reveal gross differences between cases and controls.
最近公布的数据表明，摄入多种食物与胃癌、肠癌和口腔癌风险之间存在关联。这引发了人们对这些数据准确性的担忧。为了对此进行研究，在纽约西部癌症流行病学研究中，对158名男性进行的饮食访谈与其配偶在单独访谈中对丈夫饮食史的估计进行了比较。受访者被要求估计男性食用几种食物中每种食物的频率。为了进行分析，频率估计被汇总成与近期流行病学分析中使用的类别相似的类别：每周5 - 7次、每周1 - 4次、每月1 - 3次以及每月少于1次。一般来说，60 - 80%的受访者夫妇在个别食物的食用频率上完全一致。超过90%的配偶和受访者的食物频率估计彼此相差不超过一个频率类别。配偶之间的极端分歧很少见；一般来说，在不到2%的配偶夫妇中，一方估计为最高频率类别，而另一方估计为最低频率类别。因此，作者认为，虽然饮食史不能精确复制，但它们必须足以揭示病例与对照之间的总体差异。
