Hypertension is the leading cause of mortality and disability-adjusted life years worldwide. Patients with hypertension suffer a higher risk of metabolic syndrome. The cardiometabolic index (CMI) is an innovative metabolic indicator for screening diabetes mellitus, stroke, and renal dysfunction. However, it remains unclear whether there exists an association between CMI and hypertension among older adults. Thus, the purpose of this study is to investigate the association between CMI and hyperten