Araújo Marina Campos, Ferreira Daniele Mendonça, Pereira Rosangela Alves
Instituto de Nutrição Josué de Castro, Universidade Federal do Rio de Janeiro, Brasil.
Cad Saude Publica. 2008 Dec;24(12):2775-86. doi: 10.1590/s0102-311x2008001200006.
A test-retest study was carried out to assess the reproducibility of a semi-quantitative food frequency questionnaire (SFFQ) designed for adolescents. The study group included 108 individuals. The mean interval between the two interviews was 20 days. Three days of food records from 430 adolescents were used to define the items and portions in the SFFQ. Intraclass correlation coefficients (ICC) were estimated to assess the agreement in food item reports. The agreement for energy and nutrient intake was assessed by Pearson's correlation coefficients, weighted kappa (agreement in quartile classification), and the Bland-Altman method. Data for nutrients were adjusted according to energy intake. Mean ICC was 0.54. The categorization in the same and in the adjacent quartile for data adjusted for energy intake ranged from 72% to 86% (mean = 80%). According to the Bland-Altman method, mean agreements ranged from 77% to 104% and were independent of the intake variation, except for vitamin A. Pearson's correlation coefficients ranged from 0.40 to 0.61 (mean = 0.52). The SFFQ showed acceptable reliability to assess food, energy, and nutrient intake by adolescents in the study area.
开展了一项重测研究，以评估为青少年设计的半定量食物频率问卷（SFFQ）的可重复性。研究组包括108名个体。两次访谈之间的平均间隔为20天。来自430名青少年的3天食物记录用于确定SFFQ中的项目和份量。估计组内相关系数（ICC）以评估食物项目报告中的一致性。通过Pearson相关系数、加权kappa（四分位数分类中的一致性）和Bland-Altman方法评估能量和营养素摄入的一致性。根据能量摄入对营养素数据进行调整。平均ICC为0.54。能量摄入调整后数据在相同和相邻四分位数中的分类范围为72%至86%（平均=80%）。根据Bland-Altman方法，平均一致性范围为77%至104%，且与摄入量变化无关，但维生素A除外。Pearson相关系数范围为0.40至0.61（平均=0.52）。SFFQ在评估研究区域青少年的食物、能量和营养素摄入方面显示出可接受的可靠性。
