Fig. 1From: Effect of different surgical procedures on the accuracy of prediction of the plasma concentration of fentanyl: comparison between mastectomy and laparoscopic prostatectomyCorrelation between the plasma concentration of fentanyl and simulation-predicted concentration of fentanyl. The plasma concentration of fentanyl was correlated significantly with the simulation-predicted concentration of fentanyl (r = 0.734, P < 0.01, y = 0.94x + 0.29)Back to article page