Stram D O, Hankin J H, Wilkens L R, Pike M C, Monroe K R, Park S, Henderson B E, Nomura A M, Earle M E, Nagamine F S, Kolonel L N
Department of Preventive Medicine, School of Medicine, University of Southern California, Los Angeles 90033-9987, USA.
Am J Epidemiol. 2000 Feb 15;151(4):358-70. doi: 10.1093/oxfordjournals.aje.a010214.
The performance of the dietary questionnaire used in a multiethnic cohort study in Hawaii and Los Angeles was assessed in a calibration substudy that compared diet reported from the questionnaire with three 24-hour dietary recalls. For the calibration substudy, subjects from each of eight subgroups defined by sex and ethnic group (African-American, Japanese-American, Latino, and White) were chosen randomly from among the cohort members, and each participant's previous day's diet was assessed by telephone recall on three occasions over approximately 2 months. After completing the three 24-hour recalls, each calibration subject was sent a second questionnaire; 1,606 persons completed three recalls and a second questionnaire (127 to 267 per ethnic-sex group). This report describes correlation coefficients and calibration slopes for the relation between the 24-hour recalls and second questionnaire values for a selected set of macro- and micronutrients, as absolute intakes, nutrient densities, and calorie-adjusted nutrients. In all subgroups, estimates of the correlation between the questionnaire and 24-hour recalls were greater after energy adjustment (average correlations ranged from 0.57-0.74 for nutrient densities and from 0.55-0.74 for calorie-adjusted nutrients) than when absolute nutrient values were used (average range 0.26-0.57). For absolute nutrient intakes, the correlations were greatest for Whites, somewhat lower for Japanese-Americans and Latinos, and lowest for African-Americans. After energy adjustment, the difference between subgroups were diminished, and the correlations were generally highly satisfactory.
在一项校准子研究中，对夏威夷和洛杉矶的多民族队列研究中使用的饮食问卷的性能进行了评估，该研究将问卷报告的饮食与三次24小时饮食回忆进行了比较。在校准子研究中，从按性别和种族（非裔美国人、日裔美国人、拉丁裔和白人）定义的八个亚组中的每一个亚组中随机选择队列成员，在大约两个月的时间里通过电话回忆对每位参与者前一天的饮食进行三次评估。在完成三次24小时回忆后，向每位校准对象发送第二份问卷；1606人完成了三次回忆和第二份问卷（每个种族-性别组127至267人）。本报告描述了一组选定的宏量和微量营养素（作为绝对摄入量、营养素密度和热量调整营养素）的24小时回忆与第二份问卷值之间关系的相关系数和校准斜率。在所有亚组中，能量调整后问卷与24小时回忆之间的相关性估计值（营养素密度的平均相关性范围为0.57 - 0.74，热量调整营养素的平均相关性范围为0.55 - 0.74）高于使用绝对营养素值时（平均范围为0.26 - 0.57）。对于绝对营养素摄入量，白人的相关性最高，日裔美国人和拉丁裔略低，非裔美国人最低。能量调整后，亚组之间的差异减小，相关性总体上非常令人满意。
