Factors Influencing Social Life Interference Due to Subjective Cognitive Decline among Young Adults and Middle-Aged Adults: Using Data from the 2018 Korea Community Health Survey

Subjective cognitive decline (SCD) may be an early sign of cognitive decline and can affect an individual's ability to live independently and perform daily activities, ultimately diminishing their overall quality of life. The aim of this study was to identify factors influencing social functioning in young adults and middle-aged adults experiencing SCD. The study analyzed data from 6,918 individuals who experienced SCD, derived from the 2018 Korea Community Health Survey. Frequency analysis and logistic regression were performed using complex sample weights to account for the survey design. The findings indicate that social functioning is more likely to be impaired among individuals with SCD who are younger, have a spouse, have lower income levels, perceive their health as poor, do not recognize nutrition labels, experience higher levels of subjective stress and depression, have poor sleep quality, and report lower quality of life. These results suggest that stress, depression, and other negative emotional states play a significant role in the cognitive decline experiences of young and middle-aged adults. Therefore, it is crucial to focus on preventive mental health strategies and ensure timely treatment when mental health issues arise.