Universidade de São Paulo, Brasil.
Cad Saude Publica. 2010 Nov;26(11):2090-100. doi: 10.1590/s0102-311x2010001100010.
The aim of this study was to validate the intake of carotenoids, fruits and vegetables estimated by the Food Frequency Questionnaire for Adolescents (FFQA) using the method of triads. Blood samples were collected from 80 elementary school adolescents to assess serum levels of β-carotene. Partial correlation coefficients (r) were calculated between an estimated intake of carotenoids, fruits and vegetables and the serum levels of β-carotene. Validity coefficients were calculated using the method of triads. With the exception of carotenoids, partial r from the food frequency questionnaire (FFQ) were greater than those of the 24-hour recall (24hR). The fruit/vegetable group showed the highest partial r for the FFQ (r = 0.235) and the 24hR (r = 0.137). The highest validity coefficient was obtained for the vegetable group, as assessed by the FFQ (r = 0.873). On average, the validity coefficient values for the FFQ were greater than those obtained for the 24hR or the β-carotene serum levels. The FFQA is an accurate tool for estimating the intake of carotenoids, fruits and vegetables in this population group.
本研究旨在通过三员法验证青少年食物频数问卷（FFQA）对类胡萝卜素、水果和蔬菜摄入量的估计。采集 80 名小学生的血样，以评估血清β-胡萝卜素水平。计算类胡萝卜素、水果和蔬菜的估计摄入量与血清β-胡萝卜素水平之间的偏相关系数(r)。采用三员法计算效度系数。除类胡萝卜素外，食物频数问卷（FFQ）的偏 r 值大于 24 小时回顾法（24hR）。FFQ 中水果/蔬菜组的偏 r 值最高（r = 0.235），24hR 组次之（r = 0.137）。FFQ 评估的蔬菜组的效度系数最高（r = 0.873）。平均而言，FFQ 的效度系数值大于 24hR 或β-胡萝卜素血清水平的效度系数值。FFQA 是评估该人群类胡萝卜素、水果和蔬菜摄入量的准确工具。
