Reliability and validity of a scale measuring barriers to COVID-19 booster vaccination in the post-pandemic context
Main Article Content
Abstract
A cross-sectional study was conducted among 405 adults attending Quang Xuong General Hospital in 2024 using convenience sampling and face-to-face interviews with a structured questionnaire to evaluate the reliability and validity of a scale measuring barriers to COVID-19 booster vaccination. The scale was assessed using exploratory factor analysis (EFA), confirmatory factor analysis (CFA), Cronbach’s alpha. The results showed a Kaiser–Meyer–Olkin (KMO) value of 0.853, and Bartlett’s test of sphericity was statistically significant (p < 0.001). The final scale comprised two factors: (1) concerns about vaccine safety and adverse effects, and (2) perceived lack of necessity for booster vaccination. Two items, “COVID-19 is no longer a serious threat” and “I am afraid of receiving the COVID-19 vaccine”, were removed because of cross-loadings in the EFA. The modified CFA model demonstrated a good model fit. Cronbach’s alpha ranged from 0.84 to 0.95, confirming satisfactory reliability and validity of the scale. The scale may be used to assess barriers to COVID-19 booster vaccination in similar populations.
Article Details
Keywords
COVID-19, COVID-19 booster vaccination, vaccination barriers, reliability, scale validity
References
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