COVID-19 Vaccination Among Adolescents and Young Adults: Test of the Triandis Model of Interpersonal Behavior and the Health Belief Model.

This study purpose was to test the Health Belief Model (HBM) and the Triandis Model of Interpersonal Behavior (TMIB) in predicting COVID-19 vaccine uptake among adolescents and young adults (AYAs). Data from an anonymous online survey were collected. Clusters of risk perceptions of infection were identified using Latent Class Analysis, and predictive values of TMIB and HBM factors were evaluated using logistic regression models. Response rate was 30% (468 participants). There was a combined significant effect of TMIB model components (habitual health behavior, intention, and facilitation conditions) on having received ≥1 dose of COVID-19 vaccine. Having received influenza vaccine in the past 12 months was associated with higher odds of COVID-19 vaccine uptake. Perceived vaccination benefits, and perceived risks of infection were associated with vaccine receipt; however, the HBM model performed inadequately. The HBM is commonly used in vaccine acceptance research; however, the TMIB may be more effective among AYAs.