Table 7.

Chain mediation effect analysis results.

Effect type	Pathway	Effect	Boot SE	95% confidence interval
Direct Effect	HPV Knowledge → Vaccination Willingness	0.124	0.010	[0.105, 0.143]
Indirect Effect 1	HPV Knowledge → Perceived Susceptibility → Vaccination Willingness	0.013	0.004	[0.006, 0.020]
Indirect Effect 2	HPV Knowledge → Perceived Severity → Vaccination Willingness	0.008	0.002	[0.004, 0.013]
Indirect Effect 3	HPV Knowledge → Perceived Susceptibility → Perceived Severity → Vaccination Willingness	0.010	0.002	[0.005, 0.014]
Total Indirect Effect	Sum of all indirect pathways	0.030	0.004	[0.023, 0.039]