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Objectives: This study aimed to identify the factors related to generalized anxiety disorder (GAD) among older adults. Methods: We analyzed 1,392 older adults (aged≥65) from the National Health and Nutrition Examination Survey 2021. Participants were divided into two age groups: early (aged<75) and late (aged≥75) older adults. The GAD was measured using the GAD-7. We performed multiple linear regression analysis using the stepwise selection method to identify factors associated with GAD. Results: Chewing discomfort and lower subjective health perception were associated with GAD in the early group (p<.05). In the late group, female sex was associated with GAD (p<.05). Higher perceived stress levels were associated with GAD in both the early and late groups (p<.001). Conclusions: Chewing discomfort, subjective health perception, and stress levels were associated with GAD in the early age group, while female sex and stress levels significantly influenced GAD in the late age group.