Figure 6From: A randomized, double-blind comparison of OROS®hydromorphone and controlled-release morphine for the control of chronic cancer pain Mean (standard error, SE) pain now scores in the evening during the sustained-release (SR) phase. Pain was rated using the 11-point Brief Pain Inventory (BPI), ranging from 0 (no pain) to 10 (worst pain imaginable). CR, controlled-release.Back to article page