Table 4.

Results of the mediation effect test.

Hypotheses	Paths	Standard regression coefficient (95% CI)	Total effect (95% CI)	Direct effect (95% CI)	standard error
H6	Accessibility of vaccination services → perceived usefulness → vaccination intention	0.093*** (0.047–0.161)	0.186 (0.093–0.290)	0.093 (0.004–0.183)	0.033
H7	Social norms → perceived usefulness → vaccination intention	0.283*** (0.198–0.386)	0.493 (0.390–0.590)	0.210 (0.081–0.333)	0.057

*H6: Perceived usefulness of HZV plays a mediating role in the accessibility of vaccination services and vaccination intention; H7: Perceived usefulness of the HZV plays a mediating role in social norms and vaccination intention. ***P < 0.001.