Health-related quality of life and its predictors in patients receiving first-line treatment for newly diagnosed glioblastoma multiforme in EU5: A real-world study.
157 Background: This study describes health-related quality of life (HRQoL) and its predictors including the role of O6-methylguanine DNA methyltransferase promoter (MGMT) testing in first-line (1L) patients (pts) with newly diagnosed glioblastoma multiforme (GBM). Methods: Real-world data were drawn from the GBM Disease-Specific Programme – a cross-sectional study administered to medical and neuro-oncologists who provided information on demographic/clinical status and treatment (tx) patterns for their next 4 consulting 1L GBM pts from May to July 2016 in EU5 countries. Pts voluntarily completed self-completion forms (PSCs), comprising the EORTC QLQ-C30, BN20, and EQ-5D-3L. Linear regressions were conducted using QLQ-C30 global health status (GHS), EQ-5D-3L utility, and EQ-5D visual analogue scale (VAS) scores as dependent variables. Demographic and clinical factors were included as independent variables. Statistically significant results with P<0.05 are presented. Results: 279 1L GBM pts completed a PSC, with a mean age 58.7 years old, 63% were male. 68% (n=189) were MGMT-tested with known results, of which 58% (n=110) were methylated and 42% (n=79) unmethylated. Mean GHS was 45.6 (SD=19.4), utility was 0.57 (SD=0.35), and VAS was 53.5 (SD=18.3). All functional domain scores of the QLQ-C30 were below reference values for general brain cancer population, with differences larger than published thresholds for clinical importance. Age >75 years and ECOG score of 2+ were associated with decreased HRQoL. Longer 1L tx duration, stable/responding disease, and receiving care in Germany, Italy, Spain, or UK (vs France) were associated with increased HRQoL. Results were similar for the subset of pts that was MGMT-tested; however, a greater Charlson index score and not receiving steroids (or RT) were associated with increased HRQoL. MGMT status did not appear to be an independent predictor of HRQoL. Conclusions: HRQoL in pts with GBM receiving 1L treatment is poor. Functional domain scores indicate clinically meaningful problems for these patients. Important predictors of HRQoL include age, performance status, time since tx initiation, country of care, comorbidities, and steroid use alongside RT. Results suggest there remains an unmet need in the tx management of GBM.