Risk Assessment of Mortality in Elderly Individuals: A Nationwide Cohort Study

Area of Science:

• Gerontology
• Public Health
• Epidemiology

Background:

• Existing risk assessment models for elderly mortality are limited.
• Predicting emergency room visits and rehospitalization in the elderly is crucial.
• Understanding factors influencing all-cause mortality in older populations is essential.

Purpose of the Study:

• To identify factors affecting all-cause mortality in elderly Koreans.
• To develop and validate a risk assessment model for mortality in this demographic.
• To provide a tool for better risk stratification of elderly individuals.

Main Methods:

• A cohort study utilized health checkup data from 246,422 elderly Koreans (aged ≥60) from 2009-2012.
• Multivariable Cox proportional hazards models estimated hazard ratios for various conditions and all-cause deaths.
• A nomogram was developed and validated using calibration plots and area under the curve (AUC).

Main Results:

• Age (≥85 years), underweight status, and multiple chronic diseases (≥5) were significant predictors of mortality.
• Smoking and lack of regular exercise also demonstrated an impact on mortality risk.
• The developed nomogram achieved an AUC of 0.73, indicating satisfactory predictive performance.

Conclusions:

• The study identified key determinants of all-cause mortality in elderly Koreans.
• The developed nomogram demonstrates good performance in assessing mortality risk for this population.
• This tool can aid in clinical decision-making and public health strategies for elderly care.