Fig 1.
Spread of COVID-19 and governmental reactions.
(A) Severity of governmental measures in response to the pandemic summarized as a stringency index (SI) [28], (B) confirmed cases and (C) deaths per million citizens caused by COVID-19 over the course of the study for Spain (yellow), Austria (green), Poland (red) and Czech Republic (blue). Source: Hale et al. [50]; Eurostat [51].
Table 1.
Features included in machine learning models to predict the targets ‘fear’ and ‘perceived health’.
Fig 2.
Summary of the results from the machine-learning models.
The most important predictors of the better-performing models and the most notable variables with no predictive value are featured.