Estimating Minimally Important Differences for the Worst Pain Rating of the Brief Pain Inventory–Short Form

Conflicts of interest: This research was funded by Amgen Inc., Thousand Oaks, CA in part through a contract to Health Outcomes Solutions. SDM and RDC were paid by Health Outcomes Solutions, and YQ, QJ, RD and KC are employees of Amgen and own Amgen stock and stock options.

Correspondence to: Susan D. Mathias, Health Outcomes Solutions, PO Box 2343, Winter Park, FL 32790; telephone: (407) 643-9016; fax: (866) 384-0194

¹ PubMed ID in brackets