Table 2.

Sample demographics and one-way ANOVA (N = 728).

Items	n	%	PEa		EEb		SIc		FCd		KNe		BIf		UBg
			Meanh	Pi	Mean	p	Mean	p	Mean	p	Mean	p	Mean	p	Mean	p
Gender				0.625		0.149		0.686		0.692		0.457		0.042*		0.000***
Male (1)	312	42.9	4.89		4.77		4.85		4.43		3.74		4.29		4.95
Female (2)	416	57.1	4.93		4.87		4.89		4.39		3.67		4.47		4.63
Age				0.272		0.754		0.017*		0.269		0.770		0.008**		0.368
Under 20 (1)	79	10.9	4.32		4.90		4.72		4.28		3.84		4.17		4.92
21–35 years old (2)	116	15.9	5.00		4.93		4.87		4.49		3.75		4.48		4.73
36–50 years old (3)	320	44.0	5.07		4.95		4.84		4.46		3.66		4.47		4.79
51–65 years old (4)	147	20.2	4.96		4.77		4.80		4.25		3.68		4.15		4.62
65+ years old (5)	66	9.1	4.91		5.06		4.89		4.52		3.70		4.67		4.87
Education				0.700		0.165		0.166		0.134		0.304		0.434		0.256
High school education or below (1)	113	15.5	4.92		4.76		4.78		4.29		3.85		4.26		4.91
Vocational college degree (2)	341	46.8	4.94		4.89		4.82		4.50		3.67		4.43		4.78
Bachelor degree and above (3)	274	37.6	4.88		4.77		4.99		4.34		3.67		4.40		4.69
Annual household income before tax				0.543		0.178		0.690		0.064		0.377		0.359		0.007**
Under $ 10,000 (1)	111	15.2	4.96		4.83		4.93		4.63		3.82		4.52		5.08
$ 10,001–$ 20,000 (2)	229	31.5	4.89		4.88		4.88		4.37		3.73		4.33		4.81
$ 20,001–$ 30,000 (3)	187	25.7	4.87		4.76		4.85		4.35		3.63		4.40		4.67
$ 30,001–$ 40,000 (4)	107	14.7	5.05		4.95		4.75		4.53		3.77		4.52		4.75
More than $ 40,001 (5)	94	12.9	4.86		4.68		5.00		4.20		3.54		4.24		4.51
Current marital status				0.920		0.799		0.762		0.089		0.010*		0.982		0.000***
Married (1)	531	72.9	4.91		4.82		4.87		4.36		3.63		4.39		4.61
Unmarried (2)	197	27.1	4.92		4.84		4.90		4.53		3.88		4.39		5.20

Note: ^a-g PE: Performance Expectancy; EE: Effort Expectancy; SI: Social Influence; FC: Facilitating Conditions; KN: Knowledge about COVID-19; BI: Behavioral Intention; UB: Use Behavior; ^h Average scores of items among groups (7-point Likert scale); ⁱ Results of the one-way ANOVA, ***p < 0.001, **p < 0.01, *p < 0.05.