SARS-CoV-2 vaccination may improve anxious, insomnia and depressive symptoms among Chinese population aged 18–75 years during the COVID-19 pandemic

Abstract Previous studies have reported significant decreases in the incidence of mental health problems following SARS-CoV-2 vaccination. However, less relevant studies are published in China. We conducted a cross-sectional study involving Chinese adults aged 18–75 years with no known psychiatric diseases. The study used data from mental health of SARS-CoV-2 vaccinated and unvaccinated participants from May 2020 to July 2021.Three standardized scales, namely, the Generalized Anxiety Disorder-7 (GAD-7) for anxious symptoms, Patient Health Questionnaire-9 (PHQ-9) for depressive symptoms and Athens Insomnia Score-8 (AIS-8) for insomnia symptoms, as well as basic demographic questions were used. The hierarchical regression method was used for multivariate logistic regression analysis to explore the effects of SARS-CoV-2 vaccination on anxious, insomnia, and depressive symptoms. The results confirmed first that vaccinated participants experienced significantly lower anxious, insomnia, and depressive symptoms scores (P