Use of Complementary Health Approaches and Research Interests among Older Adults in the COSMOS Trial

OBJECTIVE:We examined the prevalence and patterns of complementary health approaches (CHA) use and interest in CHA research participation among COSMOS older adults. METHODS:We conducted cross-sectional analyses of the COSMOS Study 2024 survey that asked participants about their use of and research interest in six CHA categories (manual therapies, mind-body therapies, herbal products, acupuncture, spiritual practices, and cannabis/psychedelics). We compared key baseline sociodemographic, lifestyle, and clinical characteristics between CHA users and non-users overall, and for each CHA category. We used multivariable logistic regression models to estimate the odds of CHA use in the past 12 months and ever in lifetime. RESULTS:Of the 16,144 participants who responded (median age, 77.5 y), 58.8% and 76.4% indicated using CHA at least once in the past 12 months and ever in lifetime, respectively, and 50.4% reported interest in participating in CHA research. The highest prevalence of recent use was observed for spiritual practices (38.6%; 95% CI, 37.8-39.3) and lifetime use for manual therapies (51.9%; 95% CI, 51.2-52.7). A history of falls or depression was linked to higher odds of recent and lifetime CHA use. CONCLUSIONS:The high prevalence of selected CHA highlights the need to identify evidence gaps for safety, harm, and public health impact for new focused research studies. Limited generalizability to more diverse and medically underserved populations underscores the need for continued integrative health research.