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Structural equation modeling (SEM) of factors linked to depression in patients PD and their caregivers. Model summary: chi-square = 0; df = 0; p = \p. The model fit: AGFI = \AGFI; RMSEA = \ RMSEA; AIC = 72.00. *p < 0.05; **p < 0.01;***p < 0.001.
