Second?line treatment for acute graft?versus?host disease with mesenchymal stromal cells: A decision model.

Frederick Thielen, Hedwig Blommestein, LEM Oosten, FG Calkoen, AC Lankester, JJ Zwaginga, K Le Blanc, A Redondo, F Sánchez?Guijo, M Algeri, F (Franco) Locatelli, WE Fibbe, Carin Uyl - de Groot

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Abstract Objective No standard second?line treatment exists for acute graft?versus?host disease steroid?refractory (SR?aGvHD), and long?term outcomes remain poor. Mesenchymal stromal cells (MSCs) have been evaluated as treatment, but no disease model (DM) exists that integrates and extrapolates currently available evidence. The aim of this study was to develop such a DM to describe the natural history of SR?aGvHD and to predict long?term outcomes. Method The DM was developed in collaboration with experts in haematology?oncology. Subsequently, a model simulation was run. Input parameters for transition and survival estimates were informed by published data of clinical trials on MSC treatment for SR?aGvHD. Parametric distributions were used to estimate long?term survival rates after MSCs. Results The newly developed DM is a cohort model that consists of eight health states. For the model simulation, we obtained data on 327 patients from 14 published phase II trials. Due to limited evidence, DM structure was simplified and several assumptions had to be made. Median overall survival was 3.2 years for complete response and 0.5 years for no complete response. Conclusion The DM provides a comprehensive overview on the second?line treatment pathway for aGvHD and enables long?term predictions that can be used to perform a cost?effectiveness analysis comparing any treatment for SR?aGvHD.
Original languageEnglish
Pages (from-to)676-683
Number of pages8
JournalEuropean Journal of Haematology
Issue number5
Publication statusPublished - 11 Jul 2018

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