marginally significantp = 0.089
OA had a marginally significant effect on SISA (β = 0.147, p = 0.089), and SISA significantly predicted mortality (β = 0.224, p < 0.001).
OA had a marginally significant effect on SISA (β = 0.147, p = 0.089), and SISA significantly predicted mortality (β = 0.224, p < 0.001).
Significant indirect effects were observed through IADL (19.3%), EURO-D (27.5%, marginal significance), and SISA (31.9%), indicating that functional decline, depressive symptoms, and social isolation are important mechanisms contributing to elevated mortality.