Nonlinear Association Between Geriatric Nutritional Risk Index and Cardiovascular Disease in the Elderly Based on the NHANES Database

There is growing evidence that body nutritional status influences the development of cardiovascular disease, particularly in the elderly population. The Geriatric Nutritional Risk Index (GNRI), as a tool for assessing the nutritional status and nutritional risk of elderly individuals, is applied in clinical practice. This study aimed to elucidate the relationship between GNRI and cardiovascular disease in the elderly and to assess the impact of nutritional status on cardiovascular disease.This study is a cross-sectional study based on the National Health and Nutrition Examination Survey (NHANES) database. The data for this investigation were obtained from the NHANES database from 2007 to 2018, which included 10,277 individuals aged 60 years and older. The relationship between GNRI and cardiovascular disease in the elderly was investigated using weighted multivariable logistic regression models, and smooth fitting curves were drawn to explore their association. In addition, subgroup analyses were used to explore population differences.In this study, after adjusting for all confounding variables, the odds ratio and 95% confidence intervals (CI) of the model were 0.98 (0.96, 1.00), with no statistically significant association. Smooth fitting curves showed a nonlinear correlation between GNRI and cardiovascular disease. We found an inflection point (GNRI = 139.55). Moreover, GNRI was negatively associated with cardiovascular disease in the elderly before the inflection point and not statistically significant after the inflection point.In this large cross-sectional study, we found a nonlinear correlation between GNRI and cardiovascular disease in the general elderly population in the United States.