Association between frailty and suicidal ideation in older adults: A cross-sectional study

Objectives: This study seeks to investigate the potential correlation between various levels of frailty and suicidal ideation (SI) in older adults from the USA. Methods: Our cross-sectional study extracted data on adults >= 60 years from the NHANES in 2005-2018. Frailty levels were assessed by computing the Frailty Index, classifying individuals into robust, prefrail, and frail categories. SI was evaluated utilizing Item #9 of PHQ-9. Logistic regression and restricted cubic splines were employed for analysis. Results: The analysis comprised 8564 participants, revealing that 3.3% reported experiencing SI. The association between frailty and SI in older adults was statistically significant in crude model (OR: 5.94, 95% CI: 3.46-11.27, P < 0.001). Upon adjusting for baseline characteristics, the association remained robust (AOR: 5.35, 95% CI: 3.09-10.19, P < 0.001). Model II did not substantially alter the association between frailty and SI after further adjustment for lifestyle factors (AOR: 5.23, 95% CI: 3.02-9.98, P < 0.001). In a sensitivity analysis controlling for depression, the association remained statistically significant (AOR:3.62, 95%CI: 1.76-8.75, P = 0.001). Furthermore, the associations between the Frailty Index and SI were pronounced in the restricted cubic spline (RCS) models (P overall < 0.001, P nonlinearity = 0.771). Conclusion: Frailty appears to heighten vulnerability to suicidal ideation in older adults. Training healthcare professionals to identify and address mental health issues related to frailty is crucial. Through comprehensive intervention measures, we can better safeguard the mental well-being of older adults and reduce the risk of suicide.