Boxplot depicting the slopes from separate simple linear regressions for the effect of the absolute percent difference in OR_PQL and OR_QUAD on the absolute percent bias in OR_QUAD or OR_PQL, respectively, overall and by data generation parameters.

<p>Median (interquartile range) of the estimated slope is the center of the box, box edges are the 25^th and 75^th percentile respectively, ends of the dashed lines are the 10^th and 90^th percentile, respectively.