Fig. 3: Mediation analysis results. | Humanities and Social Sciences Communications

Fig. 3: Mediation analysis results.

From: Perceived loneliness mediates the relationship between mild cognitive impairment and executive function deficits

Fig. 3

The path diagram in A shows the group label as the predictor variable (denoted as X), the UCLA loneliness scale scores as the mediator variable (denoted as M), and scores on parts A of the color trails tests (CTT) as the outcome variable (denoted as Y). The paths a and b represent the relationships between X and M and between M and X, respectively. The path a*b represents the mediation effect. The paths c and c’ respectively represent the total and indirect effects of the group on the CTT performance, and the latter was evaluated when the mediator variable was considered. The path coefficients and their standard errors were labeled above the paths. The relationships in the paths a, b, and c are visualized in B. The bootstrap method was used for each path to define 97.5% confidence intervals in the histograms shown in panel C (two-tailed). **p < 0.001; *p < 0.05.

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