Table 2.

Multivariable analysis of factors associated with the acceptance of TraceTogether (reference: unwilling/unsure about using TraceTogether)

	Cohort 1 (Jul–Oct 2020)		Cohort 2 (Nov–Dec 2020)		Cohort 3 (Jan–Feb 2021)
Model variable	AOR (95% CI)	P-value	AOR (95% CI)	P-value	AOR (95% CI)	P-value
Factors from PCA
Perceived TraceTogether as useful and necessary	2.77 (2.29–3.34)	<0.001	2.04 (1.61–2.58)	<0.001	2.30 (1.62–3.25)	<0.001
Values personal and loved ones' health	1.16 (1.02–1.32)	0.026	–		–
Concerns about personal data collected by TraceTogether	0.68 (0.60–0.78)	<0.001	0.62 (0.52–0.75)	<0.001	0.53 (0.40–0.70)	<0.001
Liberal individualism	0.88 (0.77–1.01)	0.071	0.87 (0.72–1.05)	0.137	–
Individual variablesa
I think people who are important to me (i.e. family members, spouse, friends) would recommend the use of the TraceTogether app/token [Q10].	1.62 (1.39–1.88)	<0.001	1.52 (1.24–1.87)	<0.001	1.68 (1.25–2.27)	0.001
I think the TraceTogether app/token is currently used by a lot of people [Q11].	1.35 (1.17–1.56)	<0.001	1.71 (1.40–2.08)	<0.001	1.49 (1.09–2.04)	0.012
I believe that my data collected by the TraceTogether app/token is secure [Q17].	1.26 (1.06–1.49)	0.008	1.44 (1.13–1.84)	0.003	1.67 (1.23–2.27)	0.001
I would use the TraceTogether app/token only if it benefits me [Q19].	–		0.80 (0.70–0.92)	0.002	–
Demographicsb
>50 years of age	1.31 (1.03–1.68)	0.031	–		–

Significance is p < 0.05 for bolded values.

^aRefer to Supplementary Table S1 for the Likert scale questions.

^bAll demographics variables are binary.