[Medico-economic benefits of subcutaneous formulations of trastuzumab and rituximab in day hospitalisation (SCuBA Study)].

Introduction: New pharmaceutical forms of trastuzumab and rituximab which can be administered by the subcutaneous route have been developed recently. For day hospitalisation units, these can be used in simpler treatment protocols than previous intravenous formulations. The objective of this study was to evaluate the medical and economic consequences of switching to subcutaneous formulations of trastuzumab and rituximab.

Methods: Thirty-six day care units in 30 hospitals or clinics participated in this observational study. Data were collected on the capacity of the units, the number of chemotherapy sessions implemented, the duration of occupation of a chair and the production capacity of the unit pharmacy. The number of additional sessions made possible by the use of subcutaneous forms in 2016 was determined and the associated gain in earnings calculated using national tariffs.

Results: Compared to the intravenous route, the mean duration of occupation of a chair was reduced by 56.1 % for a session of subcutaneous trastuzumab and by 73.8 % for a session of subcutaneous rituximab. The mean number of additional sessions made possible by the use of subcutaneous treatments was 242 [168-316] sessions by year by unit, corresponding to 2.7 % [1.9 %-3.4 %] of the total number of chemotherapy sessions in the unit. The corresponding gain in annual earnings was € 111 388.

Discussion: Switching the route of administration from the intravenous to the subcutaneous route is a useful strategy to address the increase in activity of day hospitalisation units. This allows an increase of 2.7 % in the total number of chemotherapy sessions in the unit. In most of the participating units, there was room for further optimization of activity, potentially to reach 4.2 % of the total number of sessions.