Box Plot from Scientific Research

X-axes are log transformed in panels B, C, and D. Thick solid lines inside the boxes are the medians. The lower and upper hinges (ie, the ends of the boxes) correspond to the 25th and 75th percentiles. The whiskers (ie, the lines beyond the boxes) extend from the hinge to 1.5 IQR. The panel-wide dotted vertical lines are study-wide medians. In panel B, the dashed line is the WHO interim target level one annual guideline value of 35 g/m3.

DOI