Table 1.

Structure of the Trial Version of the Patient Reported Experiences and Outcomes of Safety in Primary Care (PREOS-PC 0.2)

Domain	Quantitative Summary		Open-Ended Questions
	Constructs	Items in Scalea
Practice activation	Practice activation	11	1
Patient activation	Patient activation	2	1
Experiences of safety problems	Types of patient safety problems experienced	12	3
	Most recent experience: type of patient safety problem, location, people involved and degrees of responsibility (including patient), preventability	[12]b
Outcomes of patient safety (harm)	Harm specific to health domain	5	2
	Health care, personal care, and financial needs	3
	Time to recover from harm (type specific)	4
	Time to recover from harm (overall)	1
	Amount of harm experienced (overall)	1c
	Impact on overall health	1
General perceptions of patient safety	Trustworthiness	1	0
	Overall rating of patient safety	1c
Total	12 constructs	11 scales (54 items)	7

^aItems are based on Likert scales unless otherwise noted.

^bThese 12 items are not part of any scale, since their purpose is descriptive rather than evaluative.

^cVisual analog scale.