Association of physical and psychological symptom burden with time to death among palliative cancer outpatients

Abstract

19523 Background: Patients with terminal cancer have a high symptom burden, which tends to increase as death approaches. Previous studies have assessed the association of symptom burden with time to death (TTD) among inpatients or using baseline data for patients enrolled in a trial. Our purpose was to determine the association of symptom burden with TTD in patients who were followed by an outpatient palliative oncology clinic (OPOC). Methods: Cancer patients seen in the OPOC between January 2005 to June 2006 and who subsequently died were identified from the palliative care database. The last outpatient Edmonton Symptom Assessment Scale (ESAS) score completed in clinic was compared among patients in the last 4 months of life. Multiple linear regression was used to determine the association of ESAS total symptom distress score (SDS), physical subscore (PHS), psychological subscore (PSS) and individual symptom scores with demographic parameters, disease characteristics and TTD. Results: In total, 198 patients were identified. All patients had stage IV cancer, the mean age was 63.8 years (SD 12.9) and 55% were male. Median survival time from initial assessment was 6.6 weeks (range 0.3 to 16.7) and mean SDS was 46.0 (SD 18.0). Sites of cancer included gastrointestinal (36%), lung (12%), genitourinary (10%), hematological (8%), gynecological (8%), breast (7%) and others (19%). There was no significant association between symptom burden and gender, age or cancer site. TTD was significantly associated with SDS (p<0.001) and PHS (p<0.001), but not with PSS (p=0.19). Individual symptoms most strongly associated with TTD were fatigue (p=0.001), appetite (p=0.001), drowsiness (p=0.0005) and shortness of breath (p=0.0008). There was no significant association between TTD and depression (p=0.24) or anxiety (p=0.20). Conclusions: In this outpatient palliative cancer population, the association between TTD and symptoms held true only for physical symptoms, particularly constitutional symptoms and shortness of breath which are amenable to therapy. Symptoms in palliative patients should be rigorously assessed and treated, regardless of prognosis and especially at end-of-life. No significant financial relationships to disclose.