Table 4.

Moderation effects of intention subgroups on the outcome measures according to the intention-to-treat analyses (N=8062).

Outcome			Negative—in doubt			Negative—positive			In doubt—positive
			Beta (standard error)	P value	Beta (standard error)		P value	Beta (standard error)		P value
Primary outcome
	HPV a vaccination uptake
		Has received no HPV injection (reference)
		Has received one or two HPV injections	−.21 (.13)	.22	.01 (.18)		.97	.22 (.18)		.24
Secondary outcomes
	IDM b : dichotomous
		Not informed (reference)
		Informed	.18 (.15)	.22	.09 (.15)		.56	−.10 (.14)		.50
	IDM: continuous (0-48)		.92 (.69)	.18	1.03 (.65)		.12	.11 (.65)		.87
	Decisional conflict (1-7)		.26 (.08)	.001c	.04 (.07)		.57	.22 (.08)		.004
	Intention (1-7)		−.26 (.08)	.002c	−.40 (.08)		<.001c	−.14 (.07)		.03
	Attitude (1-7)		−.17 (.06)	.009	−.21 (.06)		.001c	−.04 (.06)		.51
	Beliefs (1-7)		−.04 (.04)	.36	−.02 (.04)		.68	.02 (.04)		.67
	Risk perception not vaccinated (1-7)		.04 (.07)	.51	.09 (.07)		.18	.05 (.06)		.41
	Risk perception vaccinated (1-7)		.04 (.06)	.51	−.06 (.07)		.38	−.10 (.07)		.17
	Anticipated regret (1-5)		−.03 (.07)	.70	.02 (.07)		.81	.04 (.06)		.46
	Subjective norm (−10 to 10)		−1.18 (.47)	.01	−1.64 (.43)		<.001c	−.46 (.37)		.22
	Habit (1-7)		.08 (.08)	.34	.06 (.08)		.45	−.01 (.07)		.87
	Relative effectiveness (1-10)		−.39 (.12)	.001c	−.53 (.12)		<.001c	−.14 (.11)		.21
	Self-efficacy (1-7)		−.00 (.05)	.97	.03 (.04)		.45	.03 (.05)		.50
	Knowledge (−8 to 8)		−.01 (.13)	.92	−.13 (.12)		.29	−.11 (.12)		.34

^aHPV: human papillomavirus.

^bIDM: informed decision making.

^cP<.003, thus significant (Bonferroni: 0.05/14 factors).