Poikolainen K, Kärkkäinen P
Drug Alcohol Depend. 1983 Apr;11(2):209-16. doi: 10.1016/0376-8716(83)90080-7.
In a population of 49 male volunteers, mean daily alcohol consumption was measured first by a questionnaire and then twice by a diary. The reliability of the diary method was estimated to be at least 90%. The mean daily consumption reported in the questionnaire was on the average 60% of that revealed by the diary. The difference between the two methods in measuring alcohol consumption did not depend either on age, the level of alcohol consumption, the percentage of drinking days or on the percentage of days when the subjects felt intoxicated by alcohol. This shows that the ranking of subjects according to questionnaire data is not biased in a group of subjects motivated to give accurate answers.
在49名男性志愿者群体中，首先通过问卷调查测量每日酒精摄入量，然后用日记记录法测量两次。日记记录法的可靠性估计至少为90%。问卷调查中报告的每日平均摄入量平均为日记记录法所显示摄入量的60%。两种测量酒精摄入量方法之间的差异既不取决于年龄、酒精摄入量水平、饮酒天数的百分比，也不取决于受试者感到酒精中毒的天数百分比。这表明，在一组有动力给出准确答案的受试者中，根据问卷调查数据对受试者进行的排名没有偏差。
