Metcalf P, Swinburn B, Scragg R, Dryson E
Department of Community Health, University of Auckland, New Zealand.
Ethn Health. 1997 Nov;2(4):297-308. doi: 10.1080/13557858.1997.9961838.
The reproducibility and validity of a self-administered 142-item food-frequency questionnaire (FFQ) was assessed in a population comprising 124 European and 52 Polynesian (17 Maori and 35 Pacific Island) New Zealanders aged 40-65 years. Reproducibility correlation coefficients, determined by administration of the same questionnaire on two occasions 3 years apart, were higher in European than Maori and Pacific Island participants, ranging from 0.47 to 0.87 in Europeans (median 0.66) and from 0.41 to 0.79 in Maori and Pacific Island people (median 0.44). In general, there were no significant differences in mean nutrient intakes calculated from the two FFQs by Europeans or Maori and Pacific Island participants despite their cultural and language differences. When the FFQ was compared with a 3-day food diary in a subsample of 101 Europeans, 15 Maori and 22 Pacific Islanders, the validity was good for most nutrients, with overestimation of a few nutrients in each ethnic group. Correlation coefficients between the 3-day food diary and FFQ ranged from 0.41 to 0.81 in Europeans (median 0.48) and from 0.36 to 0.56 in Maori and Pacific Island people (median 0.55). Ratios of energy intake to resting metabolic rate suggested that Maori and Pacific Island people were more likely to underestimate their habitual energy intake by the 3-day diet diary method compared to Europeans, but that Europeans were more likely to underestimate total energy intake by the food frequency method and Pacific Island participants to overestimate it. Obese Europeans and Maori were more likely to under-report dietary intakes by the 3-day diary method. We conclude that our FFQ performed better in European than Maori and Pacific Island participants.
在由124名欧洲裔和52名波利尼西亚裔（17名毛利人和35名太平洋岛民）40至65岁的新西兰人组成的人群中，对一份包含142个条目的自填式食物频率问卷（FFQ）的可重复性和有效性进行了评估。通过在相隔3年的两个时间点发放相同问卷来确定的可重复性相关系数，欧洲参与者高于毛利人和太平洋岛民参与者，欧洲人的相关系数范围为0.47至0.87（中位数为0.66），毛利人和太平洋岛民的相关系数范围为0.41至0.79（中位数为0.44）。总体而言，尽管欧洲人、毛利人和太平洋岛民参与者存在文化和语言差异，但根据两份FFQ计算出的平均营养素摄入量没有显著差异。在101名欧洲人、15名毛利人和22名太平洋岛民的子样本中，将FFQ与3天食物日记进行比较时，对大多数营养素而言有效性良好，每个种族群体中都有一些营养素被高估。3天食物日记与FFQ之间的相关系数，欧洲人的范围为0.41至0.81（中位数为0.48），毛利人和太平洋岛民的范围为0.36至0.56（中位数为0.55）。能量摄入量与静息代谢率的比值表明，与欧洲人相比，毛利人和太平洋岛民通过3天饮食日记法更有可能低估其习惯性能量摄入量，但欧洲人通过食物频率法更有可能低估总能量摄入量而太平洋岛民参与者则更有可能高估。肥胖的欧洲人和毛利人通过3天日记法更有可能少报饮食摄入量。我们得出结论，我们的FFQ在欧洲参与者中的表现优于毛利人和太平洋岛民参与者。
