Table 4.

Latent class logit model of respondent preferences (n = 1883).

Attribute	Class 1		Class 2		Class 3
	ß	SEa	ß	SE	ß	SE
Vaccine effectiveness
60%	0.202***	0.042	0.736***	0.212	2.366***	0.231
85%	0.505***	0.049	1.806***	0.167	4.435***	0.338
Vaccine related side-effects
10/100,000	0.170***	0.039	3.134***	0.105	0.790***	0.168
1/100,000	0.366***	0.043	6.510***	0.532	0.935***	0.204
Access to vaccine
Free and compulsory	0.043	0.037	−1.007***	0.190	0.434**	0.180
Chargeable and voluntary	0.000***	0.039	−2.017***	0.164	0.145	0.176
Number of doses
≥2 doses	−0.037	0.027	−0.902***	0.108	0.218*	0.115
Vaccination sites
Second level	−0.072**	0.037	0.493**	0.203	0.114	0.180
Third level	0.025	0.036	0.844***	0.163	0.173	0.163
Duration of vaccine protection
One year	0.187***	0.037	−0.412***	0.149	0.102	0.151
More than two years	0.309***	0.036	0.151	0.215	0.606***	0.196
Acquaintances vaccinated
60%	0.221***	0.036	0.798***	0.188	−0.161	0.180
90%	0.405***	0.037	0.522***	0.168	−0.006	0.163
Class probability model
Age	0.467***	0.119	0.350**	0.135	–	–
Education	−0.257***	0.093	0.109	0.105	–	–
Region	0.183**	0.090	0.083	0.098	–	–
Average monthly household income	−0.375***	0.086	−0.109	0.094	–	–
Trust in vaccines	−0.156	0.104	−0.558***	0.125	–	–
Risk of infection	−0.094	0.088	−0.228**	0.103	–	–
Constant	1.707***	0.353	0.242	0.485	–	–
Class probability
Average	0.548		0.232		0.219
Model fit
Observations = 30128
Respondents = 1883
AIC	16334.25
BIC	16766.54

^aSE standard errors.

^***Statistically significant at the 1%.

^**At 5%.

^*At 10% level.