Table 3.

Factors influencing COVID-19 vaccine acceptance.

Factors	Thai (n,%)	Expat (n,%)	P-value
The biggest influence on getting vaccine
Myself	560 (87.9)	220 (68.3)	<0.001**
Family member	372 (58.4)	55 (17)	<0.001**
Scientist	254 (39.9)	140 (43.5)	0.284
Expert vaccine	414 (65.0)	161 (50.0)	<0.001**
Government	78 (12.2)	55 (17.1)	0.041*
Friend or People I work	45 (7.1)	13 (4.0)	0.063
Community	22 (3.5)	20 (6.2)	0.049*
Concerns among responders
Adverse	554 (87.0)	165 (51.2)	<0.001**
Vaccine efficacy	392(61.5)	157(48.8)	<0.001**
Immunity after vaccine	265 (41.6)	127 (39.4)	0.520
Research on vaccine	205 (32.2)	67 (20.8)	<0.001**
Vaccine authorization	112 (17.6)	25 (7.8)	<0.001**
Vaccine safety	453 (71.1)	111 (34.5)	<0.001**
Vaccine manufacturer	212 (33.3)	156 (48.4)	<0.001**
Political involve	144 (22.6)	125 (38.8)	<0.001**
Vaccine manufacturer preference
Domestic	39 (6.1)	4 (1.2)	<0.001**
Imported	272 (42.7)	176 (54.7)
-US	236 (87.1)	116 (66.3)
-UK	25 (9.2)	41(23.4)
-China	5 (1.8)	1 (0.6)
-other	5 (1.8)	17 (9.7)
No preference	326 (51.2)	142 (44.1)
Delay vaccination
Yes	358 (56.2)	121 (37.6)	<0.001**
-At least 1 month	116 (32.4)	22 (18.2)
-At least 3 months	129 (36.0)	47 (38.8)
-At least 6 months	71 (19.8)	31 (25.6)
-At least 1 year	42 (11.7)	21 (17.4)
No	146 (22.9)	87 (27.0)
Not sure	133 (20.0)	114 (35.4)
Level of vaccine efficacy
Any level	39 (6.1)	20(6.2)	0.369
At least 30%	1 (0.2)	1 (0.3)
At least 50%	98 (15.4)	36 (11.2)
At least 70%	257 (40.3)	146 (45.3)
At least 90%	242 (38.0)	119 (37.0)
Level of serious side effect
In 10,000	30 (4.7)	32 (9.9)	<0.001**
In 100,000	136 (21.4)	112 (34.8)
In 1,000,000	471 (73.9)	178 (55.3)
Level of mild side effect
In 10	94 (14.8)	121 (37.6)	<0.001**
In 100	252 (39.6)	103 (32.0)
> 1 in 100	291 (45.7)	98 (30.4)

* P-value < 0.05; ** P-value < 0.01.