Figure 1.

Prevalence of stress level prior to and during COVID-19 lockdown. (A) Frequency of stress levels prior to and during COVID-19 lockdown. (B) Changes in PSS stress score prior to and during COVID-19. (C) Sex differences in changes in stress levels prior to and during COVID-19. (D) Age group differences in changes in stress levels prior to and during COVID-19. The box plots with whiskers represent the median and the first and the third quartiles are extended by 1.5 times the interquartile range. Upper horizontal bars indicate significant differences in stress levels prior to and during COVID-19, lower horizontal bars indicate significant cross-sectional differences in stress levels between individual groups (**P < 0.01, ***P < 0.001).