Table 3.

Factors related to COVID-19 Contact-Confirming Application installation.

Independent variables			Odds ratio (95% CI)
Female (reference: male)			0.7 (0.5-1.0)
Age (years) group (reference: aged <34 years)
	35-64	1.0(0.6-1.8)
	≥65	0.8 (0.4-1.6)
Living alone (reference: living with others)			1.1 (0.7-1.6)
SNSa accessed occasionally per week (reference: accessed below this amount)
	Twitter	1.1 (0.8-1.6)
	Facebook	1.5 (1.0-2.2)
	Instagram	1.3 (0.9-1.9)
COVID-19 infection history (reference: no history)
	Respondent has a history of COVID-19	1.3 (0.6-2.6)
	Respondent’s family has a history of COVID-19	1.2 (0.9-1.6)
Respondent fears COVID-19 infection (reference: disagree)
	Fear of health deterioration to oneself	1.0 (0.6-1.7)
	Fear of transmission to one's family and friends	0.6 (0.3-1.3)
	Fear of transmission to people other than family members or friends	2.2 (1.1-4.7)
Compliance with preventative behaviors (reference: I do not do this)
	Wearing masks when going out	0.7 (0.3-1.6)
	Restrictions on activities such as meetings	2.0 (1.0-4.0)
Assessment of authorities (reference: disagree)
	Infection is being controlled through infection countermeasures conducted by authorities	1.3 (0.8-2.0)
	Authorities are conducting infection control with a sense of responsibility	0.9 (0.6-1.5)
	I am concerned that my personal information collected by authorities might be leaked or misused for other purposes	0.9 (0.7-1.2)

^aSNS: social networking site.