Prevalence of and Factors Related to Subjective Cognitive Decline in Middle-Aged Adults

This study identified significant associations among chronic disease status, smoking, and poor sleep quality and the presence of SCD among middle-aged adults. Although causal relationships cannot be established, findings highlight the need for greater attention to cognitive health in individuals with these risk profiles. Further longitudinal research is warranted to clarify temporal relationships and assess the potential value of targeted monitoring strategies in at-risk populations.