["To evaluate the effectiveness of a psychoeducational program (i.e., PRO-SELF Pain Control Program) compared to standard care in increasing patients' knowledge regarding cancer pain management.", 'Randomized clinical trial.', 'Seven outpatient settings in northern California.', '174 outpatients with cancer and pain from bone metastasis.', 'Following randomization into either the PRO-SELF or standard care group, patients completed the Pain Experience Scale (PES) prior to and at the completion of the intervention.', 'Total and individual item scores on the PES.', 'Total PES knowledge scores increased significantly in the PRO-SELF group (21%) compared to the standard care group (0.5%). Significant improvements in knowledge scores for patients in the PRO-SELF group were found on five of the nine PES items when compared to baseline scores.'] Does the PRO-SELF pain control program improve patients ' knowledge of cancer pain management?