Background
cancer
CANCER
Shared decision-making (SDM), a medical decision-making process between patients and health care professionals (HCP) on an equal footing [Influencing factors on the uptake of SDM in routine care have been examined on different levels. A systematic review assessing barriers and facilitators on the individual HCP level found limited time and SDM not being applicable due to patient characteristics or due to the clinical situation to be the most frequently reported barriers to SDM implementation [Multi-component implementation programs (also called complex interventions, [Implementation science advises to base trials evaluating implementation programs on theory [Thus, the aim of this study was to investigate influencing factors on SDM implementation in the context of a theoretically and empirically based multi-component SDM implementation program by means of an a priori planned process evaluation. The exploration of these influencing factors complemented the outcomes evaluation of a cluster-randomized implementation trial to foster SDM in routine cancer care and added to the understanding of its results [