Empirically derived dietary patterns: interpretability and construct validity according to different factor rotation methods

Cadernos de Saúde Pública

Michelle Alessandra De Castro¹  Valéria Troncoso Baltar¹  Soraya Sant'ana De Castro Selem¹  Dirce Maria Lobo Marchioni¹  Regina Mara Fisberg¹ 

关键词: Food Consumption;    Food Habits;    Public Health Nutrition;    Statistical Factor Analysis;    Consumo de Alimentos;    Hábitos Alimentares;    Nutrição em Saúde Pública;    Análise Fatorial;    Consumo de Alimentos;    Hábitos Alimenticios;    Nutrición en Salud Pública;    Análisis Factorial;   

DOI  :  10.1590/0102-311X00070814

来源: SciELO

【 摘 要 】

This study aimed to investigate the effects of factor rotation methods on interpretability and construct validity of dietary patterns derived in a representative sample of 1,102 Brazilian adults. Dietary patterns were derived from exploratory factor analysis. Orthogonal (varimax) and oblique rotations (promax, direct oblimin) were applied. Confirmatory factor analysis assessed construct validity of the dietary patterns derived according to two factor loading cut-offs (≥ |0.20| and ≥ |0.25|). Goodness-of-fit indexes assessed the model fit. Differences in composition and in interpretability of the first pattern were observed between varimax and promax/oblimin at cut-off ≥ |0.20|. At cut-off ≥ |0.25|, these differences were no longer observed. None of the patterns derived at cut-off ≥ |0.20| showed acceptable model fit. At cut-off ≥ |0.25|, the promax rotation produced the best model fit. The effects of factor rotation on dietary patterns differed according to the factor loading cut-off used in exploratory factor analysis.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License