Persson P G, Carlsson S, Grill V, Hagman U, Lundgren A C, Ostenson C G, Perers M, Wallén A
Division of Epidemiology, Karolinska Institute, Stockholm County Council, Uppsala, Sweden.
Scand J Soc Med. 1998 Mar;26(1):75-80. doi: 10.1177/14034948980260010301.
To study the magnitude of agreement between a short self-administered food frequency questionnaire and a 7-day weighed dietary record regarding the consumption of fibre and fat, we collected information from 92 randomly selected middle-aged Swedish men. The participants first recorded all foods and drinks consumed over seven consecutive days by means of a digital scale. One month after the 7-day weighed record had been completed, a self-administered food frequency questionnaire on habitual consumption of foods containing fibre or fat during the preceding month was sent to the subjects. The 20 largest contributors of fibre and fat in the diet accounted for 71% and 52% of the total intake, respectively, based on the 7-day weighed record. The estimated mean consumption of fibre was 19.0 grams per day based on the 7-day weighed record and 18.3 grams per day based on the food frequency questionnaire. Corresponding estimated mean consumption of fat was 88.6 grams per day versus 46.9 grams per day. Men with high physical activity and low BMI, respectively, had higher intake of fibre and fat. These differences were seen for both dietary measurement methods but were more marked using the 7-day weighed record. The agreement between methods for each individual was also assessed. Based on five categories of fibre consumption, 61% of the respondents in the highest quintile according to the 7-day weighed record were classified in one of the two highest quintiles according to the food frequency questionnaire. The corresponding figure for fat intake was 56%. We conclude that the short self-administered food frequency questionnaire used in the present study can assess the absolute intake of fibre, but not of fat, with good precision. Also, the ranking of individuals in broad categories of consumption of fibre and fat was not largely misclassified based on this short questionnaire.
为研究一份简短的自填式食物频率问卷与一份7天称重饮食记录在纤维和脂肪摄入量方面的一致性程度，我们从92名随机选取的瑞典中年男性中收集了信息。参与者首先通过数字秤记录连续七天内摄入的所有食物和饮料。在7天称重记录完成一个月后，向受试者发送了一份关于前一个月习惯性摄入含纤维或脂肪食物的自填式食物频率问卷。根据7天称重记录，饮食中纤维和脂肪的20种最大贡献食物分别占总摄入量的71%和52%。基于7天称重记录，纤维的估计平均摄入量为每天19.0克，基于食物频率问卷则为每天18.3克。脂肪的相应估计平均摄入量分别为每天88.6克和46.9克。体力活动水平高和体重指数低的男性，分别有更高的纤维和脂肪摄入量。两种饮食测量方法均出现了这些差异，但使用7天称重记录时差异更为明显。我们还评估了每种方法在个体间的一致性。基于纤维摄入量的五个类别，根据7天称重记录处于最高五分位数的受访者中，61%根据食物频率问卷被归类为两个最高五分位数之一。脂肪摄入量的相应数字为56%。我们得出结论，本研究中使用的简短自填式食物频率问卷能够精确评估纤维的绝对摄入量，但不能精确评估脂肪的绝对摄入量。此外，基于这份简短问卷，在纤维和脂肪摄入大类中个体的排名并未出现大量错误分类。
