SPITEX stands for "spitalexterne Hilfe, Gesundheits- und Krankenpflege" and is an organisaion providing care and support services to individuals of all ages at home. When a person newly applies for SPITEX services, a case manager will assess patient needs during a first visit and use the tool Resident Assessment Instrument-Home Care (RAI-HC). Within this tool, the Minimum Data Set (MDS) contains the question P6 that assesses medication adherence. The case manager estimates if the client is adhrent to his/her medication «always», «80% of the time or more» or «less than 80% of the time». We aim at investigating the subjective criteria used by the case managers of SPITEX Basel to assess patient medication adherence, and to explore whether the question P6 and the answer options are appropriate. We will perform a secondary  analysis of first MDS assessments in 2017/2018 and focus groud discussion with SPITEX case managers.