Table 3.

Measurement invariance of the TPB measures.

	x2	df	CFI	ΔCFI	SRMR	RMSEA (90%CI)
Attitudes toward vaccines
M1 Configural invariance	8.815	6	0.999	-	0.012	0.048 [0.000, 0.110]
M2 Metric invariance	9.307	10	1.000	0.001	0.021	0.000 [0.000, 0.072]
M3 Scalar invariance	17.737	14	0.998	−0.002	0.030	0.036 [0.000, 0.081]
Subjective norms
M1 Configural invariance	0.000	0	1.000	-	0.000	0.000 [0.000, 0.000]
M2 Metric invariance	1.877	2	1.000	0	0.042	0.000 [0.000, 0.136]
M3 Scalar invariance	6.628	4	0.995	−0.005	0.055	0.057 [0.000, 0.130]
Perceived behavioral control
M1 Configural invariance	0.000	0	1.000	-	0.000	0.000 [0.000, 0.000]
M2 Metric invariance	6.539	2	0.993	−0.007	0.088	0.106 [0.021, 0.201]
M3 Partial measurement invariance	0.164	1	1.000	0.007	0.015	0.000 [0.000, 0.138]
M4 Scalar invariance	1.929	3	1.000	0	0.027	0.000 [0.000, 0.100]