Analysis of survival of patients treated with vemurafenib, ipilimumab and dabrafenib for advanced skin melanoma in daily clinical practice (Real-World Data): retrospective analysis of patients treated under drug/reimbursement programmes in Poland in 2013–2016

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Vemurafenib, ipilimumab and dabrafenib were registered for the treatment of advanced skin melanoma pursuant to the results of randomized phase III clinical trials. Real-world data on survival time for patients treated with those drugs in daily clinical practice are so far limited. Patients with advanced skin melanoma treated under reimbursement programmes (drug programmes), for which they were qualified pursuant to uniform inclusion criteria in force in all oncology centres in Poland. Data were obtained from the electronic databases of the national payer (NFZ) responsible for the implementation and monitoring of reimbursement (drug) programmes. The analysis included all patients included for treatment with vemurafenib (since March of 2013), ipilimumab (since March of 2014) and dabrafenib (since July of 2015) until December 2016. The end date of the observation was set to 31 December 2016. The total survival analysis was performed using the Kaplan–Meier estimator. Until 31 December 2016, 759 patients were treated with vemurafenib, 370 with ipilimumab and 181 with dabrafenib. The overall survival (OS) median was 9.8 months for patients treated with vemurafenib (95% confidence interval: 8.8–10.6) and 6.9 months for patients treated with ipilimumab (95% confidence interval: 5.7–9.2). For patients treated with dabrafenib, the OS median was not reached because of an overly short observation period. The probability of surviving 12 months in the group of patients treated with vemurafenib was 40.5%, ipilimumab was 35.1% and dabrafenib was 60.7%. The probability of surviving 24 and 36 months in the group of patients treated with vemurafenib or ipilimumab amounted to, respectively, 20.1, 15.4 and 21, 18.8%. OS of patients with advanced melanoma treated in daily clinical practice may be comparable to the ones achieved in registration trials. The use of appropriate treatment inclusion criteria may affect the obtained OS.

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