Heitor Sara Franco Diniz, Reichenheim Michael Eduardo, Ferreira Julia Elba de Souza, Castro Sybelle de Souza
Programa de Pós-Graduação em Atenção à Saúde, Universidade Federal do Triângulo Mineiro (UFTM). R. Tiradentes 81, Centro. 38200-000 Frutal MG Brasil.
Departamento de Epidemiologia, Instituto de Medicina Social, Universidade Estadual do Rio de Janeiro. Rio de Janeiro RJ Brasil.
Cien Saude Colet. 2019 Sep 9;24(9):3551-3561. doi: 10.1590/1413-81232018249.26482017.
This study examines the dimensional structure and reliability of the 36-item Food Choice Questionnaire (FCQ) in a Brazilian Portuguese version, an instrument used to measure the importance of motives behind food choices. The sample includes 502 adults. Confirmatory factorial analysis (CFA) were used to evaluate the configural (dimensionality) and metric (magnitude of factorial loadings, residual correlations and factorial discriminatory validity) structures of the instrument. Internal consistency evaluation used the Omega coefficient (Ω); temporal reproducibility used the Kappa coefficient with quadratic weighting (κ) in a separate sample of 41 subjects. The final CFA corroborates the 9-factor original structure and shows high factorial loadings (λi > 0.80 in 34 items); two residual correlations (r(i2-i3) = 0.773 and r(i16 i17) = 0.853); and factorial correlations indicating factor discriminant validity (φ < 0.80). Regarding reliability, there is adequate internal consistency (Ω = 0.877 to 0.968), and good test-retest reproducibility indicating temporal stability (κ = 0.768 to 0.917). It can be concluded that the FCQ version has good configural and metric properties, and may be recommended for use in Brazil in its present form.
本研究考察了36项食物选择问卷（FCQ）巴西葡萄牙语版本的维度结构和信度，该问卷用于衡量食物选择背后动机的重要性。样本包括502名成年人。采用验证性因子分析（CFA）来评估该问卷的构型（维度）和度量（因子载荷量、残差相关性和因子区分效度的大小）结构。内部一致性评估使用欧米伽系数（Ω）；时间再现性在41名受试者的单独样本中使用二次加权的卡帕系数（κ）。最终的CFA证实了9因子的原始结构，并显示出较高的因子载荷量（34个项目中λi > 0.80）；两个残差相关性（r(i2 - i3) = 0.773和r(i16 - i17) = 0.853）；以及表明因子区分效度的因子相关性（φ < 0.80）。关于信度，有足够的内部一致性（Ω = 0.877至0.968），以及良好的重测再现性，表明时间稳定性（κ = 0.768至0.917）。可以得出结论，FCQ版本具有良好的构型和度量特性，并且可以推荐以其当前形式在巴西使用。
