Is Oxycodone Efficacy Reflected in Serum Concentrations Is Oxycodone Efficacy Reflected in Serum Concentrations? A Multicenter, Cross- Sectional Study in 456 Adult Cancer Patients  Trine Naalsund Andreassen, MSc, Pål Klepstad, MD, PhD, Andrew Davies, MD, Kristin Bjordal, MD, PhD, Staffan Lundström, MD, PhD, Stein Kaasa, MD, PhD, Ola Dale, MD, PhD  Journal of Pain and Symptom Management  Volume 43, Issue 4, Pages 694-705 (April 2012) DOI: 10.1016/j.jpainsymman.2011.05.008 Copyright © 2012 U.S. Cancer Pain Relief Committee Terms and Conditions

Fig. 1 Distribution of the pain intensity measured by NRS 0–10. Median score was three, corresponding to “mild pain.” Journal of Pain and Symptom Management 2012 43, 694-705DOI: (10.1016/j.jpainsymman.2011.05.008) Copyright © 2012 U.S. Cancer Pain Relief Committee Terms and Conditions