Effects of global cognitive function on the prevalence of fear of falling in older adults

This study aimed to investigate the association between global cognitive functioning (GCF) and fear of falling (FOF) in a large population-based sample of adults aged 45 years and older. A total of 2997 and 2012 participants from the original sample were included in the cross-sectional and prospective models, respectively. Participants were re-coded to 'no FOF' and 'FOF' based on their self-reported responses, and those who reported FOF at follow-up were defined as the newly-developed FOF group. GCF was evaluated at baseline and follow-up (2006 and 2020) using the Korean Mini-Mental State Examination (K-MMSE). Multivariable logistic regression models were used to examine the association between GCF at baseline and risk of FOF. In our study, 23.6% (706/2997) of the participants reported FOF at baseline, and 80.3% (1615/2012) reported newly-developed FOF in the follow-up cohort. Importantly, the negative association between GCF and FOF was observed not only in the cross-sectional analyses (odds ratio [OR] 0.97, 95% confidence interval [CI] 0.96-0.99) but also in the prospective analyses (OR 0.93, 95% CI 0.87-0.99). Furthermore, GCF was associated with lower odds of recurrent newly-developed FOF in the stable group than in the original sample (OR 0.87, 95% CI 0.78-0.97 vs OR 0.92, 95% CI 0.86-0.98). Thus, GCF was negatively associated with FOF at baseline and newly-developed FOF in the long-term follow-up cohort, and persistent deficits in GCF may increase the risk of newly-developed FOF. Further research should explore the mechanisms underlying the longitudinal relationship between GCF and newly-developed FOF.