Health-related quality of life and disease symptoms in postmenopausal women with HR+, HER2- advanced breast cancer treated with everolimus plus exemestane versus exemestane monotherapy
Campone, M., Beck, J. T., Gnant, M., Neven, P., Pritchard, K. I., Bachelot, T., ... Burris, H. A. (2013). Health-related quality of life and disease symptoms in postmenopausal women with HR+, HER2- advanced breast cancer treated with everolimus plus exemestane versus exemestane monotherapy. Current Medical Research and Opinion, 29(11), 1463-1473. DOI: 10.1185/03007995.2013.836078
Everolimus (EVE)+exemestane (EXE; n?=?485) more than doubled median progression-free survival versus placebo (PBO)?+?EXE (n?=?239), with a manageable safety profile and no deterioration in health-related quality-of-life (HRQOL) in patients with hormone-receptor-positive (HR+) advanced breast cancer (ABC) who recurred or progressed on/after nonsteroidal aromatase inhibitor (NSAI) therapy. To further evaluate EVE?+?EXE impact on disease burden, we conducted additional post-hoc analyses of patient-reported HRQOL.
Research design and methods:
HRQOL was assessed using EORTC QLQ-C30 and QLQ-BR23 questionnaires at baseline and every 6 weeks thereafter until treatment discontinuation because of disease progression, toxicity, or consent withdrawal. Endpoints included the QLQ-C30 Global Health Status (QL2) scale, the QLQ-BR23 breast symptom (BRBS), and arm symptom (BRAS) scales. Between-group differences in change from baseline were assessed using linear mixed models with selected covariates. Sensitivity analysis using pattern-mixture models determined the effect of study discontinuation on/before week 24. Treatment arms were compared using differences of least squares mean (LSM) changes from baseline and 95% confidence intervals (CIs) at each timepoint and overall.
Clinical trial registration:
Main outcome measures:
Progression-free survival, survival, response rate, safety, and HRQOL.
Linear mixed models (primary model) demonstrated no statistically significant overall difference between EVE?+?EXE and PBO?+?EXE for QL2 (LSM difference?=??1.91; 95% CI?=??4.61, 0.78), BRBS (LSM difference?=??0.18; 95% CI?=??1.98, 1.62), or BRAS (LSM difference?=??0.42; 95% CI?=??2.94, 2.10). Based on pattern-mixture models, patients who dropped out early had worse QL2 decline on both treatments. In the expanded pattern-mixture model, EVE?+?EXE-treated patients who did not drop out early had stable BRBS and BRAS relative to PBO?+?EXE.