1Department of Epidemiology,Harvard T.H. Chan School of Public Health,Kresge Building,Room 911,677 Huntington Avenue,Boston,MA 02115,USA.
2School of Public Health,Muhimbili University of Health and Allied Sciences,Dar es Salaam,United Republic of Tanzania.
Public Health Nutr. 2018 Aug;21(12):2211-2220. doi: 10.1017/S1368980018000848. Epub 2018 Apr 16.
FFQ are often used to estimate food and nutrient intakes to rank individuals by their level of intake. We evaluated the relative validity of a semi-quantitative FFQ created for use in Tanzania by comparing it with two 24 h diet recalls.
We measured relative validity of the FFQ with deattenuated energy-adjusted rank correlations for nutrients, deattenuated rank correlations for food groups, and performed a cross-classification analysis of energy-adjusted nutrient quartiles using percentage of agreement and Bland-Altman analysis.
Interviews were conducted in 2014 in participants' homes in Ukonga, Dar es Salaam, Tanzania.
We surveyed 317 adults aged 40 years or older from the general public.
Deattenuated energy-adjusted rank correlation coefficients of nutrients ranged from -0·03 for riboflavin to 0·41 for percentage of energy from carbohydrates, with a median correlation of 0·21. Coefficients for food groups ranged from 0·00 for root vegetables to 0·51 for alcohol, with a median of 0·35. Relative to the average of the two 24 h diet recalls, the FFQ overestimated energy intake and intakes of all nutrients and food groups, other than tea, with ratios among nutrients ranging from 1·34 for SFA to 7·08 for vitamin A; and among food groups from 0·92 for tea to 9·00 for fruit. The percentage of participants classified into the same nutrient intake quartile ranged from 23 % for SFA to 32 % for both niacin and pantothenic acid, with a median of 28 %.
The FFQ performed moderately well in urban Tanzanian adults.
FFQ 常用于估计食物和营养素摄入量，以根据摄入量对个体进行排名。我们通过将其与两种 24 小时膳食回忆进行比较，评估了为坦桑尼亚创建的半定量 FFQ 的相对有效性。
我们使用经过衰减的能量调整后的等级相关系数来衡量 FFQ 的相对有效性，用于营养素；使用经过衰减的等级相关系数来衡量食物组；并使用一致性百分比和 Bland-Altman 分析对能量调整后的营养素四分位数进行交叉分类分析。
访谈于 2014 年在坦桑尼亚达累斯萨拉姆的 Ukonga 参与者家中进行。
我们调查了来自普通公众的 317 名年龄在 40 岁或以上的成年人。
经过衰减的能量调整后的等级相关系数范围从核黄素的-0.03 到碳水化合物能量百分比的 0.41，中位数为 0.21。食物组的系数范围从根茎类蔬菜的 0.00 到酒精的 0.51，中位数为 0.35。与两种 24 小时膳食回忆的平均值相比，FFQ 高估了能量摄入和所有营养素和食物组的摄入量，除了茶，营养素之间的比例从 SFA 的 1.34 到维生素 A 的 7.08；而在食物组之间，从茶的 0.92 到水果的 9.00。被分类为相同营养素摄入量四分位数的参与者比例范围从 SFA 的 23%到烟酸和泛酸的 32%，中位数为 28%。
FFQ 在坦桑尼亚城市成年人中表现中等。
