Figure 2

Comparing the covariate imbalance before and after weighting. Each point on the plot is a covariate and each boxplot represents the median, min and max (excluding the outliers), upper and lower quartiles of the covariates for each contrast. Comparing the covariate imbalance before (the upper panel) and after (the lower panel) weighting shows that the weighting is significantly reduced the imbalance across the treatment groups