Longitudinal trajectory of quality of life for patients with melanoma brain metastases: A secondary analysis from a whole brain radiotherapy randomized clinical trial.

Purpose: Brain metastases are common in patients with advanced melanoma. This study describes 12-month quality of life (QoL) trajectories following local management of 1-3 melanoma brain metastases.

Methods: This study assessed QoL data collected during a multi-center, prospective, open-label, phase III randomized controlled trial comparing the efficacy of adjuvant whole brain radiotherapy (WBRT) with observation after local treatment of 1-3 melanoma brain metastases. Patients completed the European Organization for Research and Treatment of Cancer Quality of Life Core (QLQ-C30) and Brain Tumour (BN-20) questionnaires at baseline and every 2 months, for 12 months.Using growth mixture modelling, QoL trajectories were identified for global health status, QLQ-C30 and BN-20 subscales for patients with baseline and at least one follow-up assessment. Multivariable logistic regression was used to examine associations between trajectories, demographic, and clinical factors.

Results: After combining QoL data from observation and WBRT arms, QLQ-C30 and BN-20 trajectories were calculated for 139 and 137 patients respectively. Depending on the QoL domain, 9-54 % of patients reported a deterioration in QoL. Older age (≥65 years) was significantly associated with deterioration in global health status (OR = 2.88, 95 %CI = 1.27-6.54), physical (OR = 3.49, 95 %CI = 1.29-9.41), role (OR = 4.15, 95 %CI = 1.77-9.71), social (OR = 4.42, 95 % CI = 1.57-12.46), cognitive (OR = 6.70, 95 % CI = 1.93-23.29) and motor functioning (OR = 4.95, 95 %CI = 1.95-12.61) and increased future uncertainty (OR = 0.20, 95 %CI = 0.07-0.53). Female sex (OR = 0.10, 95 %CI = 0.02-0.41), not having neurosurgery at baseline (OR = 0.09, 95 %CI = 0.02-0.52), 2-3 brain metastases (OR = 5.75, 95 %CI = 1.76-18.85) or receiving adjuvant WBRT (OR = 6.77, 95 %CI = 2.00-22.99) were associated with poorer physical, emotional, cognitive and social outcomes respectively.

Conclusions: Poorer QoL outcomes in the first 12 months after diagnosis of melanoma brain metastases were observed in patients aged ≥ 65 years, females, having 2-3 brain metastases, non-surgical treatment of metastases or adjuvant WBRT.Clinical Trial Registration Number:Whole Brain Radiotherapy Trial (WBRTMel) was registered with the Australian Clinical Trials Registry (ACTRN12607000512426) and ClinicalTrials.gov (NCT01503827).Study Support:This project was funded by Cancer Australia PdCCRS (Grants No. 512358, 1009485, and 1084046) and the National Helath and Medical Research Coucil of Australia (NHMRC; Grant No. 1135285).ADT was supported by a Cancer Australia Priority-driven Collaborative Cancer Research Scheme. Project #1046923. RLM was supported by an NHMRC Fellowship #1194703 and a University of Sydney, Robinson Fellowship. JFT was supported by an NHMRC Program Grant #1093017.