Fig. 1From: Development and validation of nomogram to predict severe illness requiring intensive care follow up in hospitalized COVID-19 casesEvaluation of missing data mechanism. The first plot represents the distribution of the missing data proportions in the variables considered in the study. The second plot is a heatmap represent the missing data pattern in the study. The third plot is the vertical version of the first plot which represents the missing data proportions in the heatmapBack to article page