Table 2.

Perceptions of vaccination and booster vaccination acceptance based on the health belief model.

Factors	Total		Booster Vaccination Accept		Booster Vaccination Refuse		p Value
	n	Column %	n	Column %	n	Column %
Perceived susceptibility
The risk of COVID-19 infection							0.668
High	95	8.30	82	8.44	13	7.47
Fair/low	1050	91.70	889	91.56	161	92.53
Variants have higher risk of infection than the existing strains							<0.001
Agree	978	85.41	849	87.44	129	74.14
Neutral/disagree	167	14.59	122	12.56	45	25.86
Perceived severity
The severity of COVID-19 infection							0.040
High	830	72.49	715	73.64	115	66.09
Fair/low	315	27.51	256	26.36	59	33.91
Variants can cause more severe illness than the existing strains							<0.001
Agree	943	82.36	822	84.65	121	69.54
Neutral/disagree	202	17.64	149	15.35	53	30.46
Perceived benefits
Efficacy of boosters against early circulating strains							<0.001
High	962	84.02	854	87.95	108	62.07
Fair/low	183	15.98	117	12.05	66	37.93
Efficacy of boosters to extend protection							<0.001
High	937	81.83	829	85.38	108	62.07
Fair/low	208	18.17	142	14.62	66	37.93
Efficacy of boosters against variants							<0.001
High	874	76.33	782	80.54	92	52.87
Fair/low	271	23.67	189	19.46	82	47.13
Perceived barriers
Safety of boosters							<0.001
High	958	83.67	867	89.29	91	52.30
Fair/low	187	16.33	104	10.71	83	47.70
Worry about serious adverse reaction after vaccination							<0.001
High	206	17.99	152	15.65	54	31.03
Fair/low	939	82.01	819	84.35	120	68.97
Self-efficacy
It is easy to get the COVID-19 vaccine if wanted							<0.001
Agree	845	73.80	744	76.62	101	58.05
Neutral/disagree	300	26.20	227	23.38	73	41.95
Cues to action
Used to have confirmed or suspected cases in daily close contacts							0.353
Yes	63	5.50	56	5.77	7	4.02
No	1082	94.50	915	94.23	167	95.98
Know about at least one foreign variant							0.003
Yes	984	85.94	847	87.23	137	78.74
No	161	14.06	124	12.77	37	21.26