Impact of a web-based treatment decision aid for early-stage prostate cancer on shared decision-making and health outcomes: study protocol for a randomized controlled trial

Table 1 Outcome measures

Outcomes	Instrument	T1	T2	T3
Shared decision-making outcomes
Decisional conflict	Decisional Conflict Scale	X
Decisional regret	Decisional Regret Scale		X	X
PrCa Knowledge	PrCa decision quality instrument	X
Satisfaction with information	SCIP-B	X
Decision-making preparedness	Preparation for DM-scale	X
Decision-making role	PSDM-scale	X
Perceived doctor-patient relationship	Single item	X	X	X
Actual treatment choice and health outcomes
Initial preference and treatment choice	Single items	X
Treatment satisfaction	Single item		X	X
Health-related Quality of Life	EORTC QLQ-C30	X	X	X
	EORTC QLQ-PR25	X	X	X
Side-effect impact	IIQ-7 subset for emotional state		X	X
Acceptance & Control over health status	Subjective experienced health (SBG)	X	X	X

ISSN: 1745-6215