Fig. 1
From: COVID-19 outbreaks surveillance through text mining applied to electronic health records
Frequencies stratified by age for ECU patients and confirmed cases of COVID-19 datasets. The bar chart shows the absolute frequency of age groups for both datasets (in gray and orange). Further, we also show the suspected cases of COVID-19 (in blue), estimated by the proposed model from the ECU patients dataset. The line chart (inset) shows the relative frequency of age groups for these quantities. We note the similarity between the relative frequencies of ECU patients and suspected cases, suggesting good representativeness of the suspected cases of COVID-19 compared to the ECU patients dataset