Fig. 2: Differences in the main study variables between T1 and T2.

a Comparison of the total scores of the PCL-5 and its four subscales between T1 and T2. b Comparison of the overall risk perception towards the pandemic and its four hazards between T1 and T2. PCL Posttraumatic Stress Disorder Checklist for DSM-5, RP risk perception towards the pandemic, T1 the first measurement point from May to June 2020, T2 the second measurement point from June 2021.