Survival Analysis of Aging in Place for Long-Term Care Beneficiaries: Focusing on the Impact of Dementia

Abstract

This study aimed to empirically analyze the factors influencing the survival rate of community living and transitions from nursing homes or nursing hospitals, using Aging in Place (AIP) survival analysis. Data were drawn from the National Health Insurance Service’s Elderly Cohort (version 2.0) from 2008 to 2019, encompassing approximately 104,000 long-term care beneficiaries. Survival analysis results revealed that the dementia group had a 9.1 percentage-point lower rate of community-based service utilization compared to the non-dementia group. Furthermore, AIP feasibility was lower for those who were cohabiting rather than living alone, and for those without a primary caregiver. Kaplan-Meier analysis showed that dementia shortened the community survival period, with a particularly sharp decline in retention probability when no family caregiver was available. Cox proportional hazards analysis further revealed that dementia significantly increased the likelihood of transitioning to a nursing facility or hospital by 38.7%, even after controlling for other factors. This study underscores that dementia acts as a significant barrier to sustaining community-based living and accelerates institutionalization, particularly for those living alone and in the absence of family caregiving resources, highlighting the need for AIP support policies tailored to the unique characteristics of long-term care beneficiaries with dementia.