Rodríguez Monica M, Méndez Humberto, Torún Benjamín, Schroeder Dirk, Stein Aryeh D
Institute of Nutrition of Central America and Panama (INCAP), Guatemala City, Guatemala.
Public Health Nutr. 2002 Oct;5(5):691-9. doi: 10.1079/PHN2002333.
The purpose of the study was to assess the validity of a 52-item semi-quantitative food-frequency questionnaire (FFQ) by comparing it with multiple 24-hour dietary recalls.
Three non-consecutive 24-hour dietary recalls and one FFQ were administered over a one-month period.
Four communities of El Progreso, Guatemala.
Seventy-three individuals aged 22-55 years.
: Intakes of energy and other nutrients as measured by the FFQ were higher than intakes measured by 24-hour recalls. Energy was overestimated by 361 kcal, and nutrient overestimates were particularly great for vitamin C and iron. Pearson correlation coefficients for crude energy and nutrients intakes ranged from 0.64 for energy to 0.12 for vitamin C. Exact agreement for both methods (measured by the concordance correlation coefficient) ranged from 0.59 (fat) to 0.06 (vitamin C). Pearson correlation coefficients for energy-adjusted nutrients ranged from 0.59 (carbohydrates) to 0.11 (thiamin). Pearson correlation coefficients for the proportion of total energy derived from specific foods ranged from 0.59 (tortillas) to 0.01 (sugared beverages). Cross-classification of quartiles of crude nutrient intakes for both methods indicated that <11% were grossly misclassified; after adjusting for energy intake, <13% were grossly misclassified.
This FFQ provides good measures of energy and macronutrient intakes and a reasonably reliable measure of micronutrient intake, indicating its suitability for comparing exposures within a study population in reference to heath-related endpoints. Our results highlight the need to adapt any FFQ to specific cultural needs - in this case, the Guatemalan 'core foods' (tortilla, bread and beans), for which inter-individual variability in intake is high.
本研究旨在通过将一份52项半定量食物频率问卷（FFQ）与多次24小时膳食回顾进行比较，评估该问卷的有效性。
在一个月的时间内进行了三次非连续的24小时膳食回顾和一次FFQ调查。
危地马拉埃尔普罗格雷索的四个社区。
73名年龄在22至55岁之间的个体。
FFQ所测量的能量和其他营养素摄入量高于24小时回顾法所测量的摄入量。能量被高估了361千卡，维生素C和铁的营养素高估尤为明显。粗能量和营养素摄入量的皮尔逊相关系数范围从能量的0.64到维生素C的0.12。两种方法的精确一致性（通过一致性相关系数测量）范围从脂肪的0.59到维生素C的0.06。能量调整后营养素的皮尔逊相关系数范围从碳水化合物的0.59到硫胺素的0.11。特定食物所提供总能量比例的皮尔逊相关系数范围从玉米饼的0.59到含糖饮料的0.01。两种方法的粗营养素摄入量四分位数交叉分类表明，<11%被严重误分类；在调整能量摄入后，<13%被严重误分类。
这份FFQ能较好地测量能量和常量营养素摄入量，对微量营养素摄入量的测量也具有一定的可靠性，表明其适用于在研究人群中比较与健康相关终点的暴露情况。我们的结果凸显了使任何FFQ适应特定文化需求的必要性——在这种情况下，是危地马拉的“核心食物”（玉米饼、面包和豆类），其摄入量的个体间差异很大。
