Table 4.

Model performance with different number of classes.

	COVID-19 vaccine (N = 746)				Influenza vaccine (N = 763)
Number of latent classes	2	3	4	5	2	3	4	5
Log-likelihood	−4162.210	−4047.660	−3952.929	−3881.149	−4044.581	−3941.215	−3792.420	−3756.619
CAIC	8538.249	8481.856	8465.101	8494.248	8227.863	8113.597	7908.475	7929.339
BIC	8564.249	8528.856	8533.101	8583.248	8212.863	8088.597	7873.475	7884.339