Changes and Variations in Death Due to Senility in Japan

Area of Science:

• Gerontology
• Public Health
• Demography

Background:

• Japan has a rapidly aging population, with a significant increase in individuals aged 65 and older.
• The definition and classification of senility as a cause of death in Japan remain subjects of debate.
• Understanding mortality trends related to aging is crucial for public health policy and resource allocation.

Purpose of the Study:

• To analyze temporal changes and regional variations in deaths attributed to senility in Japan.
• To compare mortality patterns of senility with other leading causes of death.
• To investigate potential socioeconomic factors associated with senility deaths.

Main Methods:

• Utilized data on deaths due to senility and other major causes from the Statistics Bureau of Japan (1995-2018).
• Employed Jointpoint regression analysis to identify significant change points in mortality trends.
• Conducted an ecological study to examine correlations between senility deaths and socioeconomic indicators, including the proportion of elderly individuals and healthcare costs.

Main Results:

• The annual number of deaths due to senility averaged 35.7 per 100,000 people and showed a consistent upward trend.
• A significant change point for senility deaths was identified in 2004.
• Senility deaths exhibited greater variability (coefficient of variation) than deaths from malignant neoplasms, heart diseases, cerebrovascular diseases, and pneumonia.
• The number of elderly individuals (≥65) and medical expenses per elderly subject (≥75) positively correlated with senility deaths.

Conclusions:

• The incidence of deaths due to senility in Japan has been increasing, with a notable acceleration post-2004.
• Significant regional disparities in senility mortality rates were observed across Japanese prefectures.
• The findings underscore the need for further research into the definition and management of senility-related mortality in an aging society.