Fig. 3
Path diagram of the mediation analysis of the role of sleep quality in self-rated health using depression symptoms and anxiety disorders symptoms (COVID-Inconfidentes Study). Path analysis based on multivariate logistic regressions, adjusted for the minimum and sufficient set of variables: sex, age, family income, alcohol and tobacco consumption, and chronic diseases. Total, direct, and indirect effects were assessed using the Karlson-Holm-Breen method. a1 indicates the total effect of sleep quality on self-rated health; b1 represents the effect of sleep on anxiety; c1 represents the effect of sleep on depression; b2 represents the effect of anxiety on self-rated health; c2 represents the effect of depression on self-rated health; a2 indicates the direct effect of sleep on self-rated health; a3 indicates the indirect effect of sleep on self-rated health.
