Fig. 2.

Boxplots for the two primary outcomes. Legend. In boxplots, the box ranges from a quartile in the lower range (25th percentile of data) to a quartile in the upper range (75th percentile). It also contains a line in the median value (50th percentile). Whiskers plots range from the quartile with a low value and a low adjacent value to the quartile in the upper range and upper adjacent value. So, we have: Lower Adjacent Value = lower quartile—3/2 IQR (interquartile range); and Upper Adjacent Value = upper quartile + 3/2 IQR. Observations after the lower and upper adjacent value are plotted in terms of points and represent outside values.