Table 2.

Factors positively associated with HPV vaccination outcomes among U.S. female and male adolescents ages 9-17 years

Target population	Outcomes
	Initiation		Completion	Initiation and Completion
Female adolescents	Parent psychosocial factors	Parent behaviors	Parent psychosocial factors
	Knowledge	Seeking HPV vaccination information32	Knowledge
	HPV*25,36,38	Familial decision making about vaccine32	HPV vaccine30
	HPV vaccine*38	Maternal experience with Pap tests39	Provider behavior
	Beliefs	Adolescent behaviors	Recommendation25,30
	Perceived benefits37	Interaction with healthcare system	Adolescent behaviors
	Perceived susceptibility28	Regular visit with provider39	Interaction with healthcare system*30
	Perceived vaccine effectiveness36,37	Recent visit with provider25,38	Parental behaviors
	Perceived vaccine safety36	Receipt of other adolescent vaccines25	Maternal experience with Pap tests30
	Satisfaction with information25	Provider behavior
	Adolescent psychosocial factors	Recommendation28,36-39
	Knowledge
	HPV25
	HPV vaccine25
Male adolescents	Parent psychosocial factor
	Intentions to vaccinate34
	Parent behavior
	Discussions about vaccine with son34
	Adolescent behavior
	Interaction with healthcare system
	Visit with provider in past year34
Female and male adolescents	Parent psychosocial factors	Clinic systems		Clinic systems
	Acceptance33	Provider-targeted		Provider-targeted
	Knowledge	Assessment and feedback31		Assessment and feedback31
	HPV vaccine32	Education only*40		Reminder/recall only35
	Beliefs	Education paired + other40		Patient-targeted
	Perceived effectiveness26	Reminder/recall only40		Reminder/recall29,31,40
	Perceived susceptability26	Reminder/recall + other27,40
	Adolescent behaviors	Patient-targeted
	Interaction with healthcare system	Reminder/recall31
	Receipt of other adolescent vaccines40
	Provider behavior
	Recommendation27,32,33,40

^*Mixed results found for association between factor and vaccination outcomes