Table 1.

Overview of outcome parameters and measurement instruments in this study.

Outcome parameters	Measurement instruments	Items
Patient self-efficacy (primary outcome)	German version of the Cancer Behavior Inventory–Brief Version (CBI-B-G) [18]	14
Control preferences	Control Preferences Scale [19]	5
Psychosocial distress	Distress Thermometer [20]	1
Utilization of medical services	[Mannheimer Module Resource Consumption]a	30
Involvement in care	Perceived Involvement in Care Scale [21]	13
Usability of PEPAb prototype	System Usability Scale [15]	10

^aNot published.

^bPEPA: personal electronic health record.