Table 4.

Estimates of percentage of people who at least somewhat agreed the app has security and privacy risks/self benefits/societal benefits and other people will install this app (%). The first column of each variable is the reference condition.

Mediator variable	All	Proximity			Location Use			App Provider				Security risk
		Decen.	Ano.Central.	Id.Central.	None	Local	Uploaded	State	Federal	Tech	Employer	None	Breach	2nd use	Re-id.
% of participants who agreed “Installing this app presents a risk to my security and privacy.”
S&P risks	54.8	52.7	52.5	59.1	50.2	57.1	57.3	54.1	50.4	56.8	58.1	43.3	62.8	59.7	53.6
% of participants who agreed “Installing this app helps me protect myself against COVID-19.”
Self benefits	68.2	68.6	67.0	69.0	66.2	67.7	70.8	70.2	70.9	65.4	66.4	69.8	67.1	67.2	68.9
% of participants who agreed “This app helps slow the spread of COVID-19 in my area.”
Societal benefits	64.9	63.6	65.2	65.9	62.5	64.1	68.0	64.9	65.4	63.0	66.4	68.0	63.4	61.8	66.6
% of participants who agreed “Most people in my area would install this app if it became available.”
Perceived adoption	41.7	41.4	41.3	42.4	41.3	40.7	43.2	40.0	44.7	42.4	39.7	42.9	42.7	37.4	44.1

Condition names are abbreviated. Decen.: Decentralized; Ano.Central.: Anonymized Centralized; Id.Central.: Identified Centralized; None: No location use; Local: Location on device; Uploaded.: Location uploaded; State: State health authorities; Federal: Federal health authorities; Tech: Tech company; Employer: Employer or school; None: No risk mentioned; Breach: Data breach risk; 2nd use: Secondary use risk; Re-id.: Re-identification risk.