Samarium-153 effectiveness in the quality of life of bone metastatic cancer patients.

Abstract

e20635 Background: Osseous metastases in patients suffering from cancer, is a multifactor symptom which affects quality of life. Methods: The Samarium group (SG) n=53 patients received a single bolus infusion of (153)Sm (37 MBq/kg), and we compared with a Control group(CG) n=37. Both groups of patients who had metastatic bone cancer requiring analgesia answered the following questionnaires: Greek Brief Pain Inventory (GBPI), Brief Multidimensional Life Satisfaction Scale (BMLSS), Hospital Anxiety Depression Scale (HADS), ECOG/WHO/Zubrod score and Hospital Satisfaction Scale (HSS),day 0 and 30±3 days after the intervention start.There was no statistically significant(SS) difference for the variables(V-) sex, age, pain’s localization and lodging. Results: Pain severity and pain interference change over time was the same for both groups P= 0.0005. For the V- HADS-anxiety, SG showed no SS improvementP= 0.397, something which was achieved for the CG,P= 0.031. The V- HADS improved SS for both groups P= 0.031 and P= 0.003 respectively which changed over time with the same way. This may show the strong relation between pain and depression. The V- ECOG also changed over time in the same way for both SG(P=0.005) and CG (P=0.014). The percentage of patients who changed scale towards improvement for their quality of life was 24,3% for the CG and 15,1% for the SG. The V-BMLSS change over time was similar for both groups. There was no SS difference for the V-HSS towards medical and nursing personnel for both groups (P=1.000). Myelotoxicity for the SG was moderate and reversible, as well as the side effects for the CG. Finally an equivalence test between the two groups, showing that both treatment regimens were equivalent for all variables: Pain severity=0.034, Pain interference=0.009, HAD-anxiety P=0.048, HAD-depression=0.033, BMLSS=0.016, ECOG=0.0005. During our study among the patients of the SG in some cases the stabilization of bone lesions was observed, and in one case partial and/or complete remission. Conclusions: Administration of (153)Sm is another equivalent option for those patients who are intolerant or resistant to medication treatment having a better cost-effectiveness result.