Table 2.

Instruments to assess primary and secondary outcomes.

Concepts			Instruments		Cronbach α		Test-retest reliability		Assessment
									Baseline		Follow-up
Primary outcomes
	Proportion of informed relatives	Website data		N/Aa		N/A		✓b		✓
	Intention to inform relatives	Informing Relatives Inventory [64], 68 items, 7-point Likert scale		.86		—c		✓		✓
	Intention for genetic testing (untested relatives)	1 item, 7-point Likert scale		N/A		N/A		✓		✓
Secondary outcomes
	Psychological distress	Profile of Mood States [65], 37 items, 7-point Likert scale		.86		—		✓		✓
	Genetic literacy—genetic affinity	Risk Factor Knowledge Index [39], 17 items, true, false, and do not know		.89		0.85		✓		✓
	Genetic literacy—cancer genetics	Breast Cancer Genetics Index [66], 12 items, true, false, and do not know		.82		0.81		✓		✓
	Coping with stressful events	Brief Cope [67], 25 items, 7-point Likert scale		.81		0.78		✓		✓
	Decision making—untested individuals	Decisional Conflict Scale-HBOCd Genetic Testing [68], 16 items, 7-point Likert scale		.96		—		✓		✓
	Decision making—tested individuals	Decisional Regret-Genetic Testing [69], 5 items, 7-point Likert scale		.87		—		✓		✓
Intervention evaluation
	Acceptability, detail, usefulness, relevance, and satisfaction	Intervention Evaluation [62,70], 16 items, 7-point Likert scale		—		—				✓

^aN/A: not applicable.

^bThe variable will be assessed at the specific time frame.

^cNot available.

^dHBOC: hereditary breast and ovarian cancer.