Fig. 4

Post-operative daily dose of study medication (mg): Previous studies have shown that 50 mg of tapentadol is the equivalent dose to 10 mg of oxycodone. The following boxplot has two y-axes for the doses of each treatment arm. Box edges indicate 25th and 75th percentiles. Whiskers indicate 5th and 95th percentiles. Mean daily dose of study medication over the 5-days observation period did not differ between the groups