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Fig. 2 | BMC Nutrition

Fig. 2

From: Association between dietary polyphenols intake and an oxidative stress biomarker: interest of multiple imputation for handling missing covariates and outcomes

Fig. 2

Comparison of estimated regression coefficient (with 95% CI) of the subclasses of polyphenols (namely flavonols, stilbenes, proanthocyanidins, dihydroflavonols, catechins, hydroxybenzoics acids, theaflavins, flavones) that had univariable prognostic value on TBARS based on at least one sample according to the handling of missing values. Each subclasses was defined as a 4-class variable according to the quartiles of polyphenols subclasses, namely below the First quartile (Q1), between Q1 and the median (Q2), between Q2 and the third quartile (Q3) and above Q3; note that the first class (<Q1) was used as the reference one. Abbreviations: CCA: complete case analyses; subjects with TBARS: multiple imputation with chained equations of missing covariates (n = 2116); all subjects: multiple imputation of missing covariates and outcome (n = 4129)

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